UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY Investment Company Act file number 811-06495 ---------------------------- FLAHERTY & CRUMRINE PREFERRED INCOME OPPORTUNITY FUND INCORPORATED -------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 301 E. Colorado Boulevard, Suite 720 PASADENA, CA 91101 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Donald F. Crumrine Flaherty & Crumrine Incorporated 301 E. Colorado Boulevard, Suite 720 PASADENA, CA 91101 -------------------------------------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: 626-795-7300 ------------- Date of fiscal year end: NOVEMBER 30, 2007 ------------------ Date of reporting period: FEBRUARY 28, 2007 ------------------ Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (ss.ss. 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 100 F Street, NE, Washington, DC 20549. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. SCHEDULE OF INVESTMENTS. The Schedule(s) of Investments is attached herewith. FLAHERTY & CRUMRINE PREFERRED INCOME OPPORTUNITY FUND To the Shareholders of the Flaherty & Crumrine Preferred Income Opportunity Fund ("PFO"): During the Fund's first fiscal quarter ended February 28, 2007, the Fund performed well in choppy, but ultimately little-changed, fixed-income markets by earning a total return of 1.6% on its net asset value (NAV). These three months saw the Fund continue its recent strong performance. Interest rates were unchanged to slightly higher over the quarter, as the Federal Reserve left the federal funds rate unchanged and long-term Treasury rates rose only slightly. Corporate credit spreads also ended the quarter little changed, while the Fund's interest-rate hedge had only a minimal impact. Both the recent quarter and trailing twelve-month periods delivered what the Fund is intended to produce - current income and stability of principal. As you can see on the following pages detailing actual holdings in the Fund's portfolio, the Fund invests in a relatively small number of industries, including utilities and insurers, banks and other finance companies. In terms of the industries the Fund's assets are in, its portfolio is no different than the overall preferred securities market. Because of the preferred securities market's overall emphasis in financial services, a portfolio of preferred securities, including the Fund's, can be at risk if the U.S. economy goes into recession. One important area of recent concern for the U.S. economy in general, and U.S. credit markets in particular, is subprime mortgage lending, which has experienced increasing default and delinquency rates in recent months. The numbers here are large in an absolute sense, but they are small relative to a $13 trillion U.S. economy and to the mortgage market as a whole. Because of this, while we cannot entirely rule it out, we currently do not believe that problems in subprime mortgages will push the economy into recession. The Fund holds no positions in securities issued by mortgage brokers or subprime specialty lenders. Nonetheless, many of the banks and insurance companies in which we have invested do have some exposure to subprime mortgages in their lending or investment portfolios. While we are examining these companies very closely, the lack of detailed disclosure about subprime mortgages makes it impossible for us to make definitive statements about the Fund's potential exposure to the problem. However, given what we now know and can infer about the companies in which we invest, we expect that EARNINGS (which flow to the companies' common shareholders) will be reduced at some of the companies we hold as a result of the problems in subprime lending. However, we currently do not expect that they will suffer losses large enough to cut meaningfully into CAPITAL (which support the debt and preferred securities owned by the Fund). Although we cannot rule out the possibility - despite our best judgment to the contrary - that some of the Fund's investments could be seriously affected, we do not currently see any serious subprime credit problems in the holdings of the Fund. The Fund's website at WWW.PREFERREDINCOME.COM has more information about Fund performance and a more complete discussion of the state of the economy (in our First Quarter Economic Update) and of subprime mortgages and their potential impact on the economy and the Fund's portfolio (in the "Frequently Asked Questions" section). We encourage you to explore the website for a wide range of additional information about your Fund. Sincerely, /S/ DONALD F. CRUMRINE /S/ ROBERT M. ETTINGER Donald F. Crumrine Robert M. Ettinger Chairman of the Board President April 20, 2007 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OVERVIEW FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ FUND STATISTICS ON 02/28/07 ----------------------------------------------- Net Asset Value $ 12.60 Market Price $ 12.61 Premium 0.08% Yield on Market Price 6.19% Common Stock Shares Outstanding 11,700,433 INDUSTRY CATEGORIES % OF PORTFOLIO ----------------------------------------------------- [GRAPHIC OMITTED] EDGAR REPRESENTATION OF DATA POINTS Other 1% Banks 25% Utilities 35% Insurance 19% Financial Services 9% Energy 7% REITs 4% MOODY'S RATINGS % OF PORTFOLIO --------------------------------------------- AAA 0.0% AA 1.1% A 17.6% BBB 59.8% BB 11.9% Not Rated 8.6% --------------------------------------------- Below Investment Grade* 15.1% * BELOW INVESTMENT GRADE BY BOTH MOODY'S AND S&P. TOP 10 HOLDINGS BY ISSUER % OF PORTFOLIO ------------------------------------------------------- Interstate Power & Light 5.0% Liberty Mutual Group 4.5% Xcel Energy 3.7% Goldman Sachs 3.6% RenaissanceRe Holdings 3.3% First Republic Bank 3.0% EOG Resources 3.0% Cobank 2.9% Public Storage 2.9% Capital One Financial 2.8% % OF PORTFOLIO** --------------------------------------------------------------------------------------------------------------------- Holdings Generating Qualified Dividend Income (QDI) for Individuals 64% Holdings Generating Income Eligible for the Corporate Dividend Received Deduction (DRD) 55% ---------------------------------------------------------------------------------------------------------------------** THIS DOES NOT REFLECT YEAR-END RESULTS OR ACTUAL TAX CATEGORIZATION OF FUND DISTRIBUTIONS. THESE PERCENTAGES CAN, AND DO, CHANGE, PERHAPS SIGNIFICANTLY, DEPENDING ON MARKET CONDITIONS. INVESTORS SHOULD CONSULT THEIR TAX ADVISOR REGARDING THEIR PERSONAL SITUATION. 3 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- PREFERRED SECURITIES -- 94.0% BANKING -- 24.7% ----------------------------------------------------------------------------------------------------------------------------- $ 3,000,000 Astoria Capital Trust I, 9.75% 11/01/29 Capital Security, Series B............... $ 3,451,992 Auction Pass-Through Trust, Cl. B: 9 Series 2006-5, Variable Rate Pfd., 144A****.................................... 295,200* 9 Series 2006-6, Variable Rate Pfd., 144A****.................................... 295,200* Banco Santander: 160,000 6.50% Pfd., 144A****........................................................... 4,080,000**(1) 62,400 6.80% Pfd., 144A****........................................................... 1,601,808**(1) $ 1,000,000 Barclays Bank PLC, 6.278% Pfd.................................................... 1,006,200**(1) 19,648 Citizens Funding Trust I, 7.50% Pfd. 09/15/66.................................... 512,076 Cobank, ACB: 45,000 7.00% Pfd., 144A****........................................................... 2,379,690* 75,000 7.814% Pfd., 144A****.......................................................... 4,020,075* $ 500,000 Comerica (Imperial) Capital Trust I, 9.98% 12/31/26 Capital Security, Series B... 531,130 4,500 FBOP Corporation, Adj. Rate Pfd., 144A****....................................... 4,668,750* $ 2,250,000 First Hawaiian Capital I, 8.343% 07/01/27 Capital Security, Series B............. 2,356,879(1) First Republic Bank: 200,000 6.25% Pfd...................................................................... 5,181,260* 5,000 6.70% Pfd...................................................................... 130,469* 640 First Republic Preferred Capital Corporation, 10.50% Pfd., 144A****.............. 709,082 22,500 First Republic Preferred Capital Corporation II, 8.75% Pfd., Series B, 144A****.. 607,050 5,000 Fleet Capital Trust VIII, 7.20% Pfd. 03/15/32.................................... 127,188 $ 4,349,000 GreenPoint Capital Trust I, 9.10% 06/01/27 Capital Security...................... 4,569,899 HBOS Capital Funding LP: $ 3,500,000 6.85% Pfd...................................................................... 3,545,150(1) $ 250,000 6.413% Pfd., 144A****.......................................................... 259,954**(1) 5,000 HSBC Series II, Variable Inverse Pfd., Pvt....................................... 5,695,000* 2,500 HSBC USA, Inc., $2.8575 Pfd...................................................... 125,825* 12,000 Keycorp Capital VIII, 7.00% Pfd. 06/15/66........................................ 316,500 25,000 Keycorp Capital IX, 6.75% Pfd. 12/15/66.......................................... 647,658 5,000 National City Capital Trust II, 6.625% Pfd. 11/15/36............................. 126,719 $ 1,500,000 North Fork Capital Trust I, 8.70% 12/15/26 Capital Security...................... 1,564,066 16,000 PFGI Capital Corporation, 7.75% Pfd.............................................. 416,320 $ 650,000 RBS Capital Trust B, 6.80% Pfd................................................... 669,500**(1) 10 Roslyn Real Estate, 8.95% Pfd., Series C, 144A****............................... 1,104,156 70,500 Sovereign Bancorp, 7.30% Pfd., Series C.......................................... 1,962,988* 20,375 Sovereign Capital Trust V, 7.75% Pfd. 05/22/36................................... 543,758 6,000 USB Capital XI, 6.60% Pfd. 09/15/66.............................................. 153,660 ------------------------------------------------------------------------------------------------------------------- 53,655,202 ---------------- 4 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- PREFERRED SECURITIES -- (CONTINUED) FINANCIAL SERVICES -- 8.6% ----------------------------------------------------------------------------------------------------------------------------- 36,500 Cabco Trust For Goldman Sachs Capital I, Adj. Rate Pfd. 02/15/34, Series GS...... $ 872,580 $ 1,000,000 CIT Group Inc, 6.10% Pfd......................................................... 1,000,100 Goldman Sachs Group, Inc.: 25 Pass-Through Certificates, Class B, 144A****................................... 2,905,000* 3,500 STRIPES Custodial Receipts, Pvt................................................ 4,039,000* 3,000 Merrill Lynch Series II STRIPES Custodial Receipts, Pvt.......................... 3,369,000* 47,000 Morgan Stanley Capital Trust VI, 6.60% Pfd....................................... 1,199,088 94,150 SLM Corporation, 6.97% Pfd., Series A............................................ 5,213,086* ------------------------------------------------------------------------------------------------------------------- 18,597,854 ---------------- INSURANCE -- 16.5% ----------------------------------------------------------------------------------------------------------------------------- 20,000 ACE Ltd., 7.80% Pfd., Series C................................................... 515,250**(1) $ 500,000 AMBAC Financial Group, Inc., 6.15% Pfd., 02/15/37................................ 496,300 $ 3,500,000 AON Capital Trust A, 8.205% 01/01/27 Capital Security............................ 4,121,698 Arch Capital Group Ltd.: 10,000 7.875% Pfd., Series B.......................................................... 261,875**(1) 4,400 8.00% Pfd...................................................................... 116,875**(1) $ 2,500,000 AXA SA 6.463% Pfd. Series 144A****............................................... 2,488,767**(1) Axis Capital Holdings: 73,950 7.25% Pfd., Series A........................................................... 1,929,636**(1) 12,750 7.50% Pfd., Series B........................................................... 1,356,345(1) 22,300 Berkley W.R. Capital Trust II, 6.75% Pfd. 07/26/45............................... 567,256 37,100 Endurance Specialty Holdings, 7.75% Pfd.......................................... 980,831**(1) 13,750 Everest Re Capital Trust II, 6.20% Pfd., Series B................................ 331,719(1) $ 1,250,000 Glen Meadow Pass Through, 6.505% Pfd., Capital Security 144A****................. 1,286,500 $ 5,000,000 Liberty Mutual Group, 7.80%, 03/15/37, 144A****.................................. 4,990,050 175,000 Principal Financial Group, 6.518% Pfd............................................ 4,998,438* $ 511,000 Provident Financing Trust I, 7.405% 03/15/38 Capital Security.................... 539,338(2) $ 4,000,000 Renaissancere Capital Trust, 8.54% 03/01/27 Capital Security, Series B........... 4,170,540(1) 25,000 Renaissancere Holdings Ltd., 6.08% Pfd., Series C................................ 603,500**(1) 100,000 Renaissancere Holdings Ltd., 6.60% Pfd., Series D................................ 2,473,000**(1) 115,500 Scottish Re Group Ltd., 7.25% Pfd................................................ 2,370,060**(1) $ 560,000 USF&G Capital, 8.312% 07/01/46 Capital Security, 144A****........................ 708,792 22,850 XL Capital Ltd., 8.00% Pfd., Series A............................................ 586,959**(1) ------------------------------------------------------------------------------------------------------------------- 35,893,729 ---------------- 5 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- PREFERRED SECURITIES -- (CONTINUED) UTILITIES -- 33.8% ----------------------------------------------------------------------------------------------------------------------------- Alabama Power Company: 4,980 4.60% Pfd...................................................................... $ 439,933* 6,485 4.72% Pfd...................................................................... 587,865* 868 4.92% Pfd...................................................................... 82,009* 6,579 Baltimore Gas & Electric Company, 6.70% Pfd., Series 1993........................ 689,767* 10,000 Calenergy Capital Trust III, 6.50% Pfd. 09/01/27................................. 483,750 1,628 Central Hudson Gas & Electric Corporation, 4.35% Pfd., Series D, Pvt............. 133,008* 3,798 Central Maine Power Company, 4.75% Pfd........................................... 322,640* 8,339 Central Vermont Public Service Corporation, 8.30% Sinking Fund Pfd., Pvt......... 866,005* Connecticut Light & Power Company: 2,050 4.50% Pfd., Series 1956........................................................ 82,799* 10,000 4.50% Pfd., Series 1963, Pvt................................................... 398,500* 25,000 5.28% Pfd., Series 1967........................................................ 1,190,500* 883 $2.04 Pfd., Series 1949........................................................ 32,335* 2,900 $2.20 Pfd., Series 1949........................................................ 114,521* 9,652 $3.24 Pfd...................................................................... 505,379* 2,000 Consolidated Edison Company of New York, 4.65% Pfd., Series C.................... 169,960* 7,500 Dayton Power and Light Company, 3.90% Pfd., Series C............................. 475,800* 23,000 Dominion CNG Capital Trust I, 7.80% 10/31/41 Capital Security.................... 580,750 $ 1,500,000 Dominion Resources Capital Trust III, 8.40% 01/15/31 Capital Security............ 1,878,136 15,030 Duquesne Light Company, 3.75% Pfd................................................ 486,972* Entergy Arkansas, Inc.: 2,840 4.56% Pfd...................................................................... 235,663* 3,050 4.56% Pfd., Series 1965........................................................ 253,089* 1,435 6.08% Pfd...................................................................... 148,236* 90,000 6.45% Pfd...................................................................... 2,343,600* 2,441 Entergy Gulf States, Inc., 7.56% Pfd............................................. 244,564* 36,000 Entergy Louisiana, Inc., 6.95% Pfd............................................... 3,707,640* Entergy Mississippi, Inc.: 4,616 4.36% Pfd...................................................................... 336,922* 5,000 4.92% Pfd...................................................................... 411,850* 4,400 Florida Power Company, 4.75% Pfd................................................. 391,248* 128,500 FPC Capital I, 7.10% Pfd., Series A.............................................. 3,216,522 101,000 FPL Group Capital, Inc., 6.60% Pfd. 10/01/66, Series A........................... 2,613,375 8,900 Georgia Power, 6.125% Pfd........................................................ 233,069* Great Plains Energy, Inc.: 1,625 4.20% Pfd...................................................................... 128,863* 2,000 4.35% Pfd...................................................................... 164,260* 6 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- PREFERRED SECURITIES -- (CONTINUED) UTILITIES -- (CONTINUED) ----------------------------------------------------------------------------------------------------------------------------- Hawaiian Electric Company, Inc.: 2,471 5.00% Pfd., Series D........................................................... $ 43,984* 7,438 5.00% Pfd., Series E........................................................... 132,396* 1,383 5.00% Pfd., Series I........................................................... 24,617* 30,500 Indianapolis Power & Light Company, 5.65% Pfd.................................... 2,924,950* 340,000 Interstate Power & Light Company, 8.375% Pfd., Series B.......................... 10,773,750* 2,588 New York State Electric & Gas, $4.50 Pfd., Series 1949........................... 221,170* Ohio Power Company: 3,018 4.20% Pfd...................................................................... 243,885* 1,251 4.40% Pfd...................................................................... 105,897* Pacific Enterprises: 13,680 $4.36 Pfd...................................................................... 1,144,469* 24,985 $4.50 Pfd...................................................................... 2,157,205* 15,730 $4.75 Pfd., Series 53.......................................................... 1,433,632* Pacific Gas & Electric Co.: 7,600 4.50% Pfd., Series H........................................................... 158,612* 41,500 5.00% Pfd., Series D........................................................... 919,640* 83,000 5.00% Pfd., Series E........................................................... 1,889,080* PacifiCorp: 5,672 $4.56 Pfd...................................................................... 467,600* 6,708 $4.72 Pfd...................................................................... 572,461* 8,750 $7.48 Sinking Fund Pfd......................................................... 890,313* 1,250 PECO Energy Company, $4.30 Pfd., Series B........................................ 102,050* $ 1,500,000 PECO Energy Capital Trust III, 7.38% 04/06/28 Capital Security, Series D......... 1,638,600 12,748 Portland General Electric, 7.75% Sinking Fund Pfd................................ 1,292,010* 14,020 Public Service Electric & Gas Company, 5.28% Pfd., Series E...................... 1,423,030* 70,210 San Diego Gas & Electric Company, $1.70 Pfd...................................... 1,834,236* South Carolina Electric & Gas Company: 13,974 5.125% Purchase Fund Pfd., Pvt................................................. 717,984* 7,774 6.00% Purchase Fund Pfd., Pvt.................................................. 395,697* Southern California Edison: 5,000 4.24% Pfd...................................................................... 103,000* 11,300 6.00% Pfd...................................................................... 1,164,606* Southern Union Company: $ 700,000 7.20% 11/01/66, Capital Security............................................... 705,482 51,750 7.55% Pfd...................................................................... 1,347,570* $ 750,000 TXU Electric Capital V, 8.175% 01/30/37 Capital Security......................... 766,017 7 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- PREFERRED SECURITIES -- (CONTINUED) UTILITIES -- (CONTINUED) ----------------------------------------------------------------------------------------------------------------------------- Union Electric Company: 5,700 4.56% Pfd...................................................................... $ 482,961* 10,156 $7.64 Pfd...................................................................... 1,051,349* Virginia Electric & Power Company: 1,665 $4.04 Pfd...................................................................... 126,707* 2,470 $4.20 Pfd...................................................................... 195,426* 1,673 $4.80 Pfd...................................................................... 151,273* 3,878 $6.98 Pfd...................................................................... 400,525* 12,500 $7.05 Pfd...................................................................... 1,295,313* 24,200 Virginia Power Capital Trust, 7.375% Pfd. 07/30/42............................... 615,951 2,262 Washington Gas & Light Company, $4.25 Pfd........................................ 190,257* 13,863 Wisconsin Power & Light Company, 6.20% Pfd....................................... 1,423,124* Xcel Energy, Inc.: 15,000 $4.08 Pfd., Series B........................................................... 1,201,500* 20,040 $4.10 Pfd., Series C........................................................... 1,613,220* 35,510 $4.11 Pfd., Series D........................................................... 2,865,302* 17,750 $4.16 Pfd., Series E........................................................... 1,449,643* 10,000 $4.56 Pfd., Series G........................................................... 886,700* ------------------------------------------------------------------------------------------------------------------- 73,492,724 ---------------- OIL AND GAS -- 4.4% ----------------------------------------------------------------------------------------------------------------------------- 8,000 Devon Energy Corporation, 6.49% Pfd., Series A................................... 815,500* 6,125 EOG Resources, Inc., 7.195% Pfd., Series B....................................... 6,566,796* $ 1,200,000 KN Capital Trust III, 7.63% 04/15/28 Capital Security............................ 1,171,200 10,000 Lasmo America Limited, 8.15% Pfd., 144A****...................................... 1,055,400*(1) ------------------------------------------------------------------------------------------------------------------- 9,608,896 ---------------- REAL ESTATE INVESTMENT TRUST (REIT) -- 3.7% ----------------------------------------------------------------------------------------------------------------------------- BRE Properties, Inc.: 12,600 6.75% Pfd., Series D........................................................... 316,969 18,900 8.08% Pfd., Series B........................................................... 483,723 10,000 Equity Office Property Trust, 7.75% Pfd., Series G............................... 250,938 1,000 Equity Residential Properties, 8.29% Pfd., Series K.............................. 60,440 8 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- PREFERRED SECURITIES -- (CONTINUED) REAL ESTATE INVESTMENT TRUST (REIT) -- (CONTINUED) ----------------------------------------------------------------------------------------------------------------------------- Public Storage, Inc.: 129,575 6.45% Pfd., Series F........................................................... $ 3,223,178 38,600 6.625% Pfd., Series M.......................................................... 960,175 2,900 6.75% Pfd., Series E........................................................... 73,588 79,900 7.25% Pfd., Series K........................................................... 2,089,888 20,000 Realty Income Corp., 6.75% Pfd., Series E........................................ 503,126 ------------------------------------------------------------------------------------------------------------------- 7,962,025 ---------------- MISCELLANEOUS INDUSTRIES -- 2.0% ----------------------------------------------------------------------------------------------------------------------------- 13,600 E.I. Du Pont de Nemours and Company, $4.50 Pfd., Series B........................ 1,166,626* 35,000 Ocean Spray Cranberries, Inc., 6.25% Pfd., 144A****.............................. 3,150,000* 26,000 Touch America Holdings, $6.875 Pfd............................................... --*+ ------------------------------------------------------------------------------------------------------------------- 4,316,626 ---------------- U.S. GOVERNMENT SECURITIES -- 0.3% ----------------------------------------------------------------------------------------------------------------------------- 4,450 Federal National Mortgage Association, 4.75% Series M............................ 206,091* 10,600 Federal Home Loan Mortgage, Adj. Rate Pfd., Series B............................. 478,272* ------------------------------------------------------------------------------------------------------------------- 684,363 ---------------- TOTAL PREFERRED SECURITIES (Cost $192,203,958).......................................................... 204,211,419 ---------------- CORPORATE DEBT SECURITIES -- 6.2% INSURANCE -- 2.6% ----------------------------------------------------------------------------------------------------------------------------- $ 900,000 Farmers Exchange Capital, 7.20% 07/15/48, 144A****............................... 954,071 $ 4,417,000 Liberty Mutual Insurance, 7.697% 10/15/97, 144A****.............................. 4,757,135 ------------------------------------------------------------------------------------------------------------------- 5,711,206 ---------------- UTILITIES -- 1.2% ----------------------------------------------------------------------------------------------------------------------------- $ 1,000,000 Duquesne Light Holdings, 6.25% 08/15/35.......................................... 917,571 10,000 Entergy Louisiana LLC, 7.60% 04/01/32............................................ 254,375 Southern Union Company: $ 750,000 7.60% 02/01/24, Senior Notes................................................... 808,413 $ 500,000 8.25% 11/15/29, Senior Notes................................................... 578,924 ------------------------------------------------------------------------------------------------------------------- 2,559,283 ---------------- 9 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ SHARES/$ PAR VALUE -------------- --------- CORPORATE DEBT SECURITIES -- (CONTINUED) OIL AND GAS -- 2.2% ----------------------------------------------------------------------------------------------------------------------------- $ 2,450,000 KN Energy, Inc., 7.45% 03/01/98.................................................. $ 2,402,926 97,900 Nexen, Inc., 7.35% Subordinated Notes............................................ 2,517,871(1) ------------------------------------------------------------------------------------------------------------------- 4,920,797 ---------------- MISCELLANEOUS -- 0.2% ----------------------------------------------------------------------------------------------------------------------------- 15,000 AT&T Inc., 6.375% 02/15/56 ...................................................... 374,062 ---------------- 374,062 ---------------- TOTAL CORPORATE DEBT SECURITIES (Cost $12,858,312)........................................................... 13,565,348 ---------------- COMMON STOCK -- 0.1% BANKING -- 0.1% ----------------------------------------------------------------------------------------------------------------------------- 15,000 New York Community Bancorp, Inc.................................................. 251,100* ------------------------------------------------------------------------------------------------------------------- 251,100 ---------------- TOTAL COMMON STOCK (Cost $246,408).............................................................. 251,100 ---------------- OPTION CONTRACTS -- 0.1% 1,400 June Put Options on June U.S. Treasury Bond Futures, Expiring 05/25/07........... 142,750+ ------------------------------------------------------------------------------------------------------------------- TOTAL OPTION CONTRACTS (Cost $601,808).............................................................. 142,750 ---------------- MONEY MARKET FUND -- 0.3% 685,665 BlackRock Provident Institutional, TempFund...................................... 685,665 ------------------------------------------------------------------------------------------------------------------- TOTAL MONEY MARKET FUND (Cost $685,665).............................................................. 685,665 ---------------- 10 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated PORTFOLIO OF INVESTMENTS (CONTINUED) FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------ VALUE --------- TOTAL INVESTMENTS (Cost $206,596,151***).......................................... 100.7% $ 218,856,282 OTHER ASSETS AND LIABILITIES (Net)................................................ (0.7)% (1,479,633) ---------- ---------------- TOTAL NET ASSETS AVAILABLE TO COMMON AND PREFERRED STOCK.......................... 100.0%++ $ 217,376,649 ---------- ---------------- MONEY MARKET CUMULATIVE PREFERRED(TM) STOCK (MMP(R)) REDEMPTION VALUE.......................... (70,000,000) ---------------- TOTAL NET ASSETS AVAILABLE TO COMMON STOCK..................................................... $ 147,376,649 ================----------------------------- * Securities eligible for the Dividends Received Deduction and distributing Qualified Dividend Income. ** Securities distributing Qualified Dividend Income only. *** Aggregate cost of securities held. **** Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration to qualified institutional buyers. These securities have been determined to be liquid under the guidelines established by the Board of Directors. (1) Foreign Issuer. (2) A portion of this security is on loan. + Non-income producing. ++ The percentage shown for each investment category is the total value of that category as a percentage of net assets available to Common and Preferred Stock. ABBREVIATIONS: PFD. -- Preferred Securities PVT. -- Private Placement Securities 11 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated STATEMENT OF CHANGES IN NET ASSETS AVAILABLE TO COMMON STOCK(1) FOR THE PERIOD FROM DECEMBER 1, 2006 THROUGH FEBRUARY 28, 2007 (UNAUDITED) ------------------------------------------------------------------------- VALUE -------- OPERATIONS: Net investment income......................................................................... $ 3,049,498 Net realized gain/(loss) on investments sold during the period................................ 1,943,464 Change in net unrealized appreciation/depreciation of investments held during the period........................................................................... (1,992,960) Distributions to MMP(R)* Shareholders from net investment income, including changes in accumulated undeclared distributions .................................. (762,125) --------------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS.......................................... 2,237,877 DISTRIBUTIONS: Dividends paid from net investment income to Common Stock Shareholders(2)..................... (2,281,255) --------------- TOTAL DISTRIBUTIONS TO COMMON STOCK SHAREHOLDERS.............................................. (2,281,255) FUND SHARE TRANSACTIONS: Increase from shares issued under the Dividend Reinvestment and Cash Purchase Plan...................................................................... 62,701 --------------- NET INCREASE IN NET ASSETS AVAILABLE TO COMMON STOCK RESULTING FROM FUND SHARE TRANSACTIONS..................................................................... 62,701 NET INCREASE IN NET ASSETS AVAILABLE TO COMMON STOCK --------------- FOR THE PERIOD ............................................................................... $ 19,323 =============== ---------------------------------------------------------------------------------------------------------------------------- NET ASSETS AVAILABLE TO COMMON STOCK: Beginning of period........................................................................... $ 147,357,326 Net increase in net assets during the period.................................................. 19,323 --------------- End of period................................................................................. $ 147,376,649 ===============-------------------------------------------------------- * Money Market Cumulative Preferred(TM) StocK. (1) These tables summarize the three months ended February 28, 2007 and should be read in conjunction with the Fund's audited financial statements, including footnotes, in its Annual Report dated November 30, 2006. (2) May include income earned, but not paid out, in prior fiscal year. 12 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated FINANCIAL HIGHLIGHTS(1) FOR THE PERIOD FROM DECEMBER 1, 2006 THROUGH FEBRUARY 28, 2007 (UNAUDITED) FOR A COMMON STOCK SHARE OUTSTANDING THROUGHOUT THE PERIOD. ----------------------------------------------------------- PER SHARE OPERATING PERFORMANCE: Net asset value, beginning of period.......................................................... $ 12.60 ----------- INVESTMENT OPERATIONS: Net investment income......................................................................... 0.26 Net realized and unrealized gain/(loss) on investments........................................ 0.01 DISTRIBUTIONS TO MMP(R)* SHAREHOLDERS: From net investment income.................................................................... (0.07) From net realized capital gains............................................................... -- ----------- Total from investment operations.............................................................. 0.20 ----------- DISTRIBUTIONS TO COMMON STOCK SHAREHOLDERS: From net investment income.................................................................... (0.20) From net realized capital gains............................................................... -- ----------- Total distributions to Common Stock Shareholders.............................................. (0.20) ----------- Net asset value, end of period................................................................ $ 12.60 =========== Market value, end of period................................................................... $ 12.61 =========== Common Stock shares outstanding, end of period................................................ 11,700,433 =========== RATIOS TO AVERAGE NET ASSETS AVAILABLE TO COMMON STOCK SHAREHOLDERS: Net investment income+........................................................................ 6.28%** Operating expenses............................................................................ 1.58%** -------------------------------------------------------- SUPPLEMENTAL DATA:++ Portfolio turnover rate....................................................................... 15%*** Total net assets available to Common and Preferred Stock, end of period (in 000's)............ $ 217,377 Ratio of operating expenses to total average net assets available to Common and Preferred Stock ................................................................ 1.07%**(1) These tables summarize the three months ended February 28, 2007 and should be read in conjunction with the Fund's audited financial statements, including footnotes, in its Annual Report dated November 30, 2006. * Money Market Cumulative PreferredTM Stock. ** Annualized. *** Not Annualized. + The net investment income ratios reflect income net of operating expenses and payments to MMP(R)* Shareholders. ++ Information presented under heading Supplemental Data includes MMP(R)*. 13 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated FINANCIAL HIGHLIGHTS (CONTINUED) PER SHARE OF COMMON STOCK (UNAUDITED) ------------------------------------------------------------------ TOTAL DIVIDEND DIVIDENDS NET ASSET NYSE REINVESTMENT PAID VALUE CLOSING PRICE PRICE(1) --------- --------- ------------- ------------ December 31, 2006............................... $0.0650 $12.39 $12.36 $12.39 January 31, 2007................................ 0.0650 12.42 12.39 12.42 February 28, 2007............................... 0.0650 12.60 12.61 12.60-------------------- (1) Whenever the net asset value per share of the Fund's Common Stock is less than or equal to the market price per share on the payment date, new shares issued will be valued at the higher of net asset value or 95% of the then current market price. Otherwise, the reinvestment shares of Common Stock will be purchased in the open market. 14 -------------------------------------------------------------------------------- Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated NOTES TO FINANCIAL STATEMENTS (UNAUDITED) ---------------------------------------- 1. AGGREGATE INFORMATION FOR FEDERAL INCOME TAX PURPOSES At February 28, 2007, the aggregate cost of securities for federal income tax purposes was $206,731,009, the aggregate gross unrealized appreciation for all securities in which there is an excess of value over tax cost was $16,334,630 and the aggregate gross unrealized depreciation for all securities in which there is an excess of tax cost over value was $4,209,357. 15 DIRECTORS Donald F. Crumrine, CFA Chairman of the Board David Gale Morgan Gust Karen H. Hogan Robert F. Wulf, CFA OFFICERS Donald F. Crumrine, CFA Chief Executive Officer Robert M. Ettinger, CFA President R. Eric Chadwick, CFA Chief Financial Officer, Vice President and Treasurer Chad C. Conwell Chief Compliance Officer, Vice President and Secretary Bradford S. Stone Vice President and Assistant Treasurer Laurie C. Lodolo Assistant Compliance Officer, Assistant Treasurer and Assistant Secretary INVESTMENT ADVISER Flaherty & Crumrine Incorporated e-mail: flaherty@pfdincome.com QUESTIONS CONCERNING YOUR SHARES OF FLAHERTY & CRUMRINE PREFERRED INCOME OPPORTUNITY FUND? o If your shares are held in a Brokerage Account, contact your Broker. o If you have physical possession of your shares in certificate form, contact the Fund's Transfer Agent & Shareholder Servicing Agent -- PFPC Inc. P.O. Box 43027 Providence, RI 02940-3027 1-800-331-1710 THIS REPORT IS SENT TO SHAREHOLDERS OF FLAHERTY & CRUMRINE PREFERRED INCOME OPPORTUNITY FUND INCORPORATED FOR THEIR INFORMATION. IT IS NOT A PROSPECTUS, CIRCULAR OR REPRESENTATION INTENDED FOR USE IN THE PURCHASE OR SALE OF SHARES OF THE FUND OR OF ANY SECURITIES MENTIONED IN THIS REPORT. [GRAPHIC OMITTED] LIGHTHOUSE ART FLAHERTY & CRUMRINE ================ PREFERRED INCOME OPPORTUNITY FUND QUARTERLY REPORT FEBRUARY 28, 2007 www.preferredincome.com ITEM 2. CONTROLS AND PROCEDURES. (a) The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on their evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934, as amended (17 CFR 240.13a-15(b) or 240.15d-15(b)). (b) There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 3. EXHIBITS. Certifications pursuant to Rule 30a-2(a) under the 1940 Act and Section 302 of the Sarbanes-Oxley Act of 2002 are attached hereto. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) FLAHERTY & CRUMRINE PREFERRED INCOME OPPORTUNITY FUND INCORPORATED By (Signature and Title)* /S/ DONALD F. CRUMRINE ------------------------------------------------------- Donald F. Crumrine, Director, Chairman of the Board and Chief Executive Officer (principal executive officer) Date APRIL 23, 2007 ---------------------------------------------------------------------------- Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /S/ DONALD F. CRUMRINE ------------------------------------------------------- Donald F. Crumrine, Director, Chairman of the Board and Chief Executive Officer (principal executive officer) Date APRIL 23, 2007 ---------------------------------------------------------------------------- By (Signature and Title)* /S/ R. ERIC CHADWICK ------------------------------------------------------- R. Eric Chadwick, Chief Financial Officer, Treasurer and Vice President (principal financial officer) Date APRIL 23, 2007 ---------------------------------------------------------------------------- * Print the name and title of each signing officer under his or her signature.