Edgar Filing: Flaherty & Crumrine PREFERRED INCOME OPPORTUNITY FUND INC

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
-------------

Date of reporting period: AUGUST 31, 2008
-----------------

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 Flaherty & Crumrine Preferred Income Opportunity:

Stating the obvious, we are facing extraordinary and unprecedented times in
the financial markets. The events that ultimately culminated in the government's
massive financial rescue plan have impacted the market for preferred securities
particularly hard. As a result, for the quarter ended August 31, 2008, the
Fund's common shareholders experienced a total return on net asset value of
-14.1%, subsequent to the quarter-end and through the date of this letter, the
net asset value has continued to decline significantly.

Prices on long-term US Treasury bonds rose during the quarter, as investors
sought the safety of government bonds despite historically low yields. On the
flip side, there were few buyers and abundant sellers of most preferred
securities and corporate bonds. A downward cycle for prices ensued, as selling
pressure pushed prices lower which in turn led to more selling pressure.

This pattern of selling begetting selling is an effect of severe bear
market psychology. In addition, investors and lenders, seeking the safety and
security of cash, withhold capital from borrowers. Since the free flow of
capital is essential to our economy, and economic growth is a key factor in
security valuation, concerns about price declines become self-fulfilling. The
bears clearly were in control both during and subsequent to the quarter.

The root cause of the current financial problems remains
unresolved-residential real estate markets have yet to stabilize. The
speculative component of residential housing has resulted in "bubble and crash"
cycles in the past, but the current adjustment is unlike any we can recall. Far
too many people wanted to buy homes under the "greater fool" plan and lenders
were far too willing to help. The real estate market will eventually return to
equilibrium and the dramatic measures taken by the government will help calm the
markets. In the meantime we must deal with circumstances at hand.

Since the end of our fiscal quarter events have transpired at a
breathtaking pace - particularly relating to the Fund's use of leverage and its
dividend. Our website allows for much more frequent communication than our
quarterly letters. We have posted updates throughout this financial crisis and
we encourage you to continue visiting us at www.preferredincome.com.

In addition to managing your Fund, we are also shareholders. We understand
your concerns about recent events and we are doing our best to respond to them.
Nonetheless, our goals remain constant - conduct exhaustive research and
construct an investment portfolio that is designed to deliver high current
income consistent with the objectives and guidelines of the Fund.

Sincerely,

/s/ Donald F. Crumrine /s/ Robert M. Ettinger

Donald F. Crumrine Robert M. Ettinger
Chairman of the Board President

October 16, 2008

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OVERVIEW
AUGUST 31, 2008 (UNAUDITED)

FUND STATISTICS ON 8/31/08
--------------------------

Net Asset Value $ 7.36
Market Price $ 7.25
Discount 1.49%
Yield on Market Price 11.26%
Common Stock Shares Outstanding 11,833,198

MOODY'S RATINGS % OF PORTFOLIO
--------------- --------------

AA 4.4%
A 11.5%
BBB 57.0%
BB 21.4%
Below "BB" 0.2%
Not Rated 3.4%
----
Below Investment Grade* 18.5%

* BELOW INVESTMENT GRADE BY BOTH MOODY'S AND S&P.

(PIE CHART)

INDUSTRY CATEGORIES % OF PORTFOLIO
------------------- --------------

Banking 22%
Energy 7%
Financial Services 14%
Insurance 16%
Other 5%
REITs 2%
Utilities 34%

TOP 10 HOLDINGS BY ISSUER % OF PORTFOLIO
------------------------- --------------

Interstate Power & Light 5.8%
Liberty Mutual Group 4.5%
Merrill Lynch 4.4%
Southern California Edison 3.6%
Sovereign Bancorp 3.5%
Puget Energy 3.1%
Entergy Louisiana 2.9%
Metlife 2.8%
Banco Santander 2.8%
CIT Group 2.6%

% OF PORTFOLIO**
----------------

Holdings Generating Qualified Dividend Income (QDI) for Individuals 56%
Holdings Generating Income Eligible for the Corporate Dividend Received Deduction (DRD) 51%

** 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.

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OF INVESTMENTS
AUGUST 31, 2008 (UNAUDITED)

SHARES/$ PAR VALUE
------------ ------------

PREFERRED SECURITIES -- 95.4%
BANKING -- 21.7%
$ 3,000,000 Astoria Capital Trust I, 9.75% 11/01/29, Series B ............................... $ 3,020,100
Banco Santander:
178,200 6.50% Pfd. ................................................................... 3,569,578**(1)
36,800 6.80% Pfd. ................................................................... 788,900**(1)
$ 2,400,000 Capital One Capital III, 7.686% 08/15/36 ........................................ 1,781,760
$ 4,500,000 CBG Florida REIT Corporation, 7.114%, 144A**** .................................. 1,407,600
25,000 Citigroup, Inc., 8.50% Pfd., Series F ........................................... 538,000*
19,648 Citizens Funding Trust I, 7.50% Pfd. 09/15/66 ................................... 246,828
45,000 Cobank, ACB, 7.00% Pfd., 144A**** ............................................... 1,478,700*
$ 3,500,000 Comerica Capital Trust II, 6.576% 02/20/37 ...................................... 1,992,200
4,500 FBOP Corporation, Adj. Rate Pfd., 144A**** ...................................... 2,475,000*
$ 2,250,000 First Hawaiian Capital I, 8.343% 07/01/27, Series B ............................. 2,172,600(1)
1,750 First Tennessee Bank, Adj. Rate Pfd., 144A**** .................................. 918,750*
$ 450,000 HBOS PLC, 6.657%, 144A**** ...................................................... 282,915**(1)
4,400 HSBC Series II, Variable Inverse Pfd., Pvt. ..................................... 0*+
2,500 HSBC USA, Inc., $2.8575 Pfd. .................................................... 97,825*
JPMorgan Chase & Co.:
10,000 6.15% Pfd., Series E ......................................................... 394,800*
$ 250,000 7.90%, Series I .............................................................. 227,825*
60,000 Keycorp Capital IX, 6.75% Pfd. 12/15/66 ......................................... 903,750
99,000 National City Corporation, 9.875% Pfd. .......................................... 1,948,320*
28,000 PFGI Capital Corporation, 7.75% Pfd. ............................................ 441,560
$ 2,500,000 Regions Financing Trust II, 6.625% 05/15/47 ..................................... 1,322,000
3,200 Regions Financing Trust III, 8.875% Pfd. 06/15/78 ............................... 69,920(2)
212,700 Sovereign Bancorp, 7.30% Pfd., Series C ......................................... 3,409,858*
20,375 Sovereign Capital Trust V, 7.75% Pfd. 05/22/36 .................................. 372,710(2)
1,850 Sovereign REIT, 12.00% Pfd., Series A, 144A**** ................................. 1,764,641
U.S. Bancorp, Auction Pass-Through Trust, Cl. B:
9 Series 2006-5, Variable Rate Pfd., 144A**** .................................. 225*+
9 Series 2006-6, Variable Rate Pfd., 144A**** .................................. 225*+
60,000 Wachovia Corporation, 8.00% Pfd., Series J ...................................... 1,118,400*
$ 900,000 Washington Mutual Preferred Funding IV, 9.75%, 144A**** ......................... 403,560
$ 1,400,000 Webster Capital Trust IV, 7.65% 06/15/37 ........................................ 903,420
------------
34,051,970
------------
FINANCIAL SERVICES -- 14.2%
CIT Group, Inc.:
10,000 5.189% Pfd., Series B ........................................................ 460,800*
261,200 6.35% Pfd., Series A ......................................................... 3,667,901*

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OF INVESTMENTS (CONTINUED)
AUGUST 31, 2008 (UNAUDITED)

SHARES/$ PAR VALUE
------------ ------------

PREFERRED SECURITIES -- (CONTINUED)
FINANCIAL SERVICES -- (CONTINUED)
160,000 Countrywide Capital IV, 6.75% Pfd. .............................................. $ 2,410,000(2)
12,000 Countrywide Capital V, 7.00% Pfd. 11/01/36 ...................................... 178,500
890 First Republic Preferred Capital Corporation, 10.50% Pfd., 144A**** ............. 940,926
22,500 First Republic Preferred Capital Corporation II, 8.75% Pfd., Series B,
144A**** ..................................................................... 519,750
Goldman Sachs:
20,000 Adj. Rate Pfd., Series C ..................................................... 323,750*
175,000 Adj. Rate Pfd., Series D ..................................................... 2,723,438*
24,680 Cabco Trust Capital I, Adj. Rate Pfd. 02/15/34 ............................... 346,569
11 Pass-Through Certificates, Class B, 144A**** ................................. 0*+
3,500 STRIPES Custodial Receipts, Pvt. ............................................. 35*+
Lehman Brothers Holdings, Inc.:
45,800 5.67% Pfd., Series D ......................................................... 1,257,668*
9,500 5.94% Pfd., Series C ......................................................... 257,830*
25,000 6.50% Pfd., Series F ......................................................... 376,500*
13,400 7.95% Pfd. ................................................................... 208,504*
Merrill Lynch:
112,000 Adj. Rate Pfd., Series 5 ..................................................... 1,323,000*
3,000 Series II STRIPES Custodial Receipts, Pvt. ................................... 30*+
200,000 6.25% Pfd. ................................................................... 3,562,000*
30,000 8.625% Pfd., Series 8 ........................................................ 640,200*
SLM Corporation:
4,000 Adj. Rate Pfd., Series B ..................................................... 161,500*
94,150 6.97% Pfd., Series A ......................................................... 2,985,497*
------------
22,344,398
------------
INSURANCE -- 13.8%
$ 1,000,000 AMBAC Financial Group, Inc., 6.15% 02/15/37 ..................................... 353,300
$ 3,250,000 AON Capital Trust A, 8.205% 01/01/27 ............................................ 3,043,407
Arch Capital Group Ltd.:
10,000 7.875% Pfd., Series B ........................................................ 231,563**(1)
24,400 8.00% Pfd., Series A ......................................................... 559,675**(1)
29,700 Axis Capital Holdings, 7.50% Pfd., Series B ..................................... 2,323,431(1)
90,000 Delphi Financial Group, 7.376% Pfd. 05/15/37 .................................... 1,577,817
$ 3,250,000 Everest Re Holdings, 6.60% 05/15/37 ............................................. 2,151,500
Liberty Mutual Group:
$ 4,500,000 7.80% 03/15/37, 144A**** ..................................................... 3,359,250
$ 250,000 10.75% 06/15/58, 144A**** .................................................... 227,800

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OF INVESTMENTS (CONTINUED)
AUGUST 31, 2008 (UNAUDITED)

SHARES/$ PAR VALUE
------------ ------------

PREFERRED SECURITIES -- (CONTINUED)
INSURANCE -- (CONTINUED)
$ 500,000 MetLife Capital Trust X, 9.25% 04/08/38, 144A**** ............................... $ 507,450
186,600 MetLife, Inc., 6.50% Pfd., Series B ............................................. 3,919,067*
$ 200,000 PartnerRe Finance II, 6.44% 12/01/66 ............................................ 154,440(1)
Renaissancere Holdings Ltd.:
42,050 6.08% Pfd., Series C ......................................................... 740,080**(1)
56,700 6.60% Pfd., Series D ......................................................... 1,111,320**(1)
115,500 Scottish Re Group Ltd., 7.25% Pfd. .............................................. 245,438**(1)+
$ 1,060,000 USF&G Capital, 8.312% 07/01/46, 144A**** ........................................ 1,140,194
------------
21,645,732
------------
UTILITIES -- 34.3%
Alabama Power Company:
4,980 4.60% Pfd. ................................................................... 388,639*
6,485 4.72% Pfd. ................................................................... 519,189*
868 4.92% Pfd. ................................................................... 72,443*
1,579 Baltimore Gas & Electric Company, 6.70% Pfd., Series 1993 ....................... 155,800*
92,000 Calenergy Capital Trust III, 6.50% Pfd. 09/01/27 ................................ 4,125,280
5,560 Central Vermont Public Service Corporation, 8.30% Sinking Fund Pfd., Pvt. ....... 572,902*
Connecticut Light & Power Company:
2,050 4.50% Pfd., Series 1956 ...................................................... 75,399*
25,000 5.28% Pfd., Series 1967 ...................................................... 1,102,000*
2,000 Consolidated Edison Company of New York, 4.65% Pfd., Series C ................... 163,920*
40,000 Constellation Energy Group, Inc, 8.625% Pfd. 06/15/63, Series A ................. 1,003,200
$ 1,750,000 Dominion Resources, Inc., 7.50% ................................................. 1,587,775
15,030 Duquesne Light Company, 3.75% Pfd. .............................................. 434,066*
90,000 Entergy Arkansas, Inc., 6.45% Pfd. .............................................. 2,223,000*
46,000 Entergy Louisiana, Inc., 6.95% Pfd. ............................................. 4,582,520*
4,400 Florida Power Company, 4.75% Pfd. ............................................... 363,880*
Georgia Power Company:
8,000 6.125% Pfd. .................................................................. 195,680*
6,500 6.50% Pfd., Series 07-A ...................................................... 644,410*
2,000 Great Plains Energy, Inc., 4.35% Pfd. ........................................... 156,720*
Hawaiian Electric Company, Inc.:
2,471 5.00% Pfd., Series D ......................................................... 43,011*
7,438 5.00% Pfd., Series E ......................................................... 129,468*
1,383 5.00% Pfd., Series I ......................................................... 24,073*
30,500 Indianapolis Power & Light Company, 5.65% Pfd. .................................. 2,637,030*
336,400 Interstate Power & Light Company, 8.375% Pfd., Series B ......................... 9,096,256*

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OF INVESTMENTS (CONTINUED)
AUGUST 31, 2008 (UNAUDITED)

SHARES/$ PAR VALUE
------------ ------------

PREFERRED SECURITIES -- (CONTINUED)
UTILITIES -- (CONTINUED)
Pacific Enterprises:
15,935 $4.50 Pfd. ................................................................... $ 1,259,343*
8,935 $4.75 Pfd., Series 53 ........................................................ 745,268*
$ 1,500,000 PECO Energy Capital Trust III, 7.38% 04/06/28, Series D ......................... 1,482,150
14,020 Public Service Electric & Gas Company, 5.28% Pfd., Series E ..................... 1,334,564*
$ 5,750,000 Puget Sound Energy, Inc., 6.974% 06/01/67 ....................................... 4,821,375
21,635 San Diego Gas & Electric Company, $1.70 Pfd. .................................... 535,466*
South Carolina Electric & Gas Company:
13,711 5.125% Purchase Fund Pfd., Pvt. .............................................. 706,117*
7,774 6.00% Purchase Fund Pfd., Pvt. ............................................... 396,629*
Southern California Edison:
25,000 6.00% Pfd., Series C ......................................................... 2,290,000*
35,000 6.125% Pfd. .................................................................. 3,289,300*
Southern Union Company:
$ 1,780,000 7.20% 11/01/66 ............................................................... 1,421,686
6,575 7.55% Pfd. ................................................................... 167,046*
$ 750,000 TXU Electric Capital V, 8.175% 01/30/37 ......................................... 600,075
Union Electric Company:
5,700 4.56% Pfd. ................................................................... 445,797*
10,156 $7.64 Pfd. ................................................................... 991,835*
Virginia Electric & Power Company:
3,878 $6.98 Pfd. ................................................................... 384,310*
12,500 $7.05 Pfd. ................................................................... 1,267,969*
$ 1,700,000 Wisconsin Energy Corporation, 6.25% 05/15/67 .................................... 1,409,351
------------
53,844,942
------------
ENERGY -- 6.3%
$ 4,000,000 Enbridge Energy Partners LP, 8.05% 10/01/37 ..................................... 3,565,436
$ 2,500,000 Enterprise Products Partners, 7.034% 01/15/68 ................................... 2,171,757
3,000 Kinder Morgan GP, Inc., 8.33% Pfd., 144A**** .................................... 3,085,020*
10,000 Lasmo America Limited, 8.15% Pfd., 144A**** ..................................... 1,015,000*(1)
------------
9,837,213
------------
REAL ESTATE INVESTMENT TRUST (REIT) -- 2.1%
65,000 Duke Realty Corporation, 8.375% Pfd., Series O .................................. 1,536,600
PS Business Parks, Inc.:
10,000 6.70% Pfd., Series P ......................................................... 186,250(2)
59,400 6.875% Pfd., Series I ........................................................ 1,128,600
7,500 7.20% Pfd., Series M ......................................................... 150,704

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OF INVESTMENTS (CONTINUED)
AUGUST 31, 2008 (UNAUDITED)

SHARES/$ PAR VALUE
------------ ------------

PREFERRED SECURITIES -- (CONTINUED)
REAL ESTATE INVESTMENT TRUST (REIT) -- (CONTINUED)
Public Storage, Inc.:
10,500 6.75% Pfd., Series E ......................................................... $ 220,172
5,500 6.75% Pfd., Series L ......................................................... 116,875
------------
3,339,201
------------
MISCELLANEOUS INDUSTRIES -- 2.7%
13,600 E.I. Du Pont de Nemours and Company, $4.50 Pfd., Series B ....................... 1,107,448*
35,000 Ocean Spray Cranberries, Inc., 6.25% Pfd., 144A**** ............................. 3,159,450*
------------
4,266,898
------------
U.S. GOVERNMENT AGENCY -- 0.3%
55,000 Fannie Mae, Adj. Rate Pfd., Series P ............................................ 529,100*
------------
529,100
------------
TOTAL PREFERRED SECURITIES
(Cost $190,166,686) .......................................................... 149,859,454
------------
CORPORATE DEBT SECURITIES -- 2.5%
INSURANCE -- 2.2%
$ 4,417,000 Liberty Mutual Insurance, 7.697% 10/15/97, 144A**** ............................. 3,478,829
------------
3,478,829
------------
ENERGY -- 0.3%
19,500 Nexen, Inc., 7.35% Subordinated Notes ........................................... 460,079(1)
------------
460,079
------------
TOTAL CORPORATE DEBT SECURITIES
(Cost $4,835,608) ............................................................ 3,938,908
------------
OPTION CONTRACTS -- 0.2%
150 December Put Options on December U.S. Treasury Bond Futures,
Expiring 11/21/08 ............................................................... 234,375+
------------
TOTAL OPTION CONTRACTS
(Cost $262,010) .............................................................. 234,375
------------
SECURITIES LENDING COLLATERAL -- 1.9%
3,025,332 BlackRock Institutional Money Market Trust ...................................... 3,025,332
------------
TOTAL SECURITIES LENDING COLLATERAL
(Cost $3,025,332) ............................................................ 3,025,332
------------

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
PORTFOLIO OF INVESTMENTS (CONTINUED)
AUGUST 31, 2008 (UNAUDITED)

TOTAL INVESTMENTS (Cost $198,289,636***) ....................................................... 100.0% $157,058,069
OTHER ASSETS AND LIABILITIES (Net) ............................................................. 0.0% 47,932
----- ------------
TOTAL NET ASSETS AVAILABLE TO COMMON AND PREFERRED STOCK ....................................... 100.0%++ $157,106,001
----- ------------
AUCTION PREFERRED STOCK (APS) REDEMPTION VALUE ................................................. (70,000,000)
------------
TOTAL NET ASSETS AVAILABLE TO COMMON STOCK ..................................................... $ 87,106,001
============

----------
* 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) All or 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

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE TO COMMON STOCK(1)
FOR THE PERIOD FROM DECEMBER 1, 2007 THROUGH AUGUST 31, 2008 (UNAUDITED)

VALUE
------------

OPERATIONS:
Net investment income ................................................ $ 9,049,395
Net realized gain/(loss) on investments sold during the period ....... (3,053,082)
Change in net unrealized appreciation/depreciation of investments .... (28,552,710)
Distributions to APS* Shareholders from net investment income,
including changes in accumulated undeclared distributions ......... (3,026,812)
------------
NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS ................. (25,583,209)

DISTRIBUTIONS:
Dividends paid from net investment income to Common Stock
Shareholders(2) ................................................... (7,217,562)
------------
TOTAL DISTRIBUTIONS TO COMMON STOCK SHAREHOLDERS ..................... (7,217,562)

FUND SHARE TRANSACTIONS:
Increase from shares issued under the Dividend Reinvestment and Cash
Purchase Plan ..................................................... 820,339
------------
NET INCREASE IN NET ASSETS AVAILABLE TO COMMON STOCK RESULTING FROM
FUND SHARE TRANSACTIONS ........................................... 820,339
------------
NET DECREASE IN NET ASSETS AVAILABLE TO COMMON STOCK FOR THE PERIOD ..... $(31,980,432)
============
NET ASSETS AVAILABLE TO COMMON STOCK:
Beginning of period .................................................. $119,086,433
Net decrease in net assets during the period ......................... (31,980,432)
------------
End of period ........................................................ $ 87,106,001
============

----------
* Auction Preferred Stock.

(1) These tables summarize the nine months ended August 31, 2008 and should be
read in conjunction with the Fund's audited financial statements, including
footnotes, in its Annual Report dated November 30, 2007.

(2) May include income earned, but not paid out, in prior fiscal year.

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
FINANCIAL HIGHLIGHTS(1)
FOR THE PERIOD FROM DECEMBER 1, 2007 THROUGH AUGUST 31, 2008 (UNAUDITED)
FOR A COMMON STOCK SHARE OUTSTANDING THROUGHOUT THE PERIOD.

PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ................................................ $ 10.14
-----------
INVESTMENT OPERATIONS:
Net investment income ............................................................... 0.77
Net realized and unrealized gain/(loss) on investments .............................. (2.68)

DISTRIBUTIONS TO APS* SHAREHOLDERS:
From net investment income .......................................................... (0.26)
-----------
Total from investment operations .................................................... (2.17)
-----------
DISTRIBUTIONS TO COMMON STOCK SHAREHOLDERS:
From net investment income .......................................................... (0.61)
-----------
Total distributions to Common Stock Shareholders .................................... (0.61)
-----------
Net asset value, end of period ...................................................... $ 7.36
===========
Market value, end of period ......................................................... $ 7.25
===========
Common Stock shares outstanding, end of period ...................................... 11,833,198
===========
RATIOS TO AVERAGE NET ASSETS AVAILABLE TO COMMON STOCK SHAREHOLDERS:
Net investment income+ .............................................................. 7.68%**
Operating expenses .................................................................. 2.03%**

SUPPLEMENTAL DATA:++
Portfolio turnover rate ............................................................. 52%***
Total net assets available to Common and Preferred Stock, end of period (in 000's) .. $ 157,106
Ratio of operating expenses to total average net assets available to Common and
Preferred Stock .................................................................. 1.21%**

* Auction Preferred Stock.

** Annualized.

*** Not Annualized.

+ The net investment income ratios reflect income net of operating expenses
and payments to APS Shareholders.

++ Information presented under heading Supplemental Data includes APS.

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, 2007 ... $0.0680 $ 9.64 $ 9.46 $ 9.64
January 31, 2008 .... 0.0680 10.23 10.25 10.23
February 29, 2008 ... 0.0680 9.94 10.06 9.94
March 31, 2008 ...... 0.0680 8.65 9.09 8.65
April 30, 2008 ...... 0.0680 8.93 9.47 9.00
May 31, 2008 ........ 0.0680 8.80 9.90 9.41
June 30, 2008 ....... 0.0680 8.10 9.30 8.83
July 31, 2008 ....... 0.0680 7.39 7.77 7.39
August 31, 2008 ..... 0.0680 7.36 7.25 7.35

----------
(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 reinvestment 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.

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

1. AGGREGATE INFORMATION FOR FEDERAL INCOME TAX PURPOSES

At August 31, 2008 the aggregate cost of securities for federal income tax
purposes was $198,176,947, the aggregate gross unrealized appreciation for all
securities in which there is an excess of value over tax cost was $3,570,966 and
the aggregate gross unrealized depreciation for all securities in which there is
an excess of tax cost over value was $44,689,844.

2. ADDITIONAL ACCOUNTING STANDARDS

STATEMENT OF FINANCIAL ACCOUNTING STANDARDS NO. 157 "FAIR VALUE
MEASUREMENTS" ("SFAS 157")

In September 2006, the Financial Accounting Standards Board issued SFAS 157
effective for fiscal years beginning after November 15, 2007. This standard
clarifies the definition of fair value for financial reporting, establishes a
framework for measuring fair value and requires additional disclosures about the
use of fair value measurements. The Fund has adopted SFAS 157 as of December 1,
2007. The three levels of the fair value hierarchy under SFAS 157 are described
below:

- Level 1 - quoted prices in active markets for identical securities

- Level 2 - other significant observable inputs (including quoted prices
for similar securities, interest rates, prepayment speeds,
credit risk, etc.)

- Level 3 - significant unobservable inputs (including the Fund's own
assumptions in determining the fair value of investments)

The inputs or methodology used for valuing securities are not necessarily
an indication of the risk associated with investing in those securities. A
summary of the inputs used to value the Fund's net assets as of August 31, 2008
is as follows:

OTHER FINANCIAL
INSTRUMENTS
INVESTMENTS (UNREALIZED
IN SECURITIES APPRECIATION/
VALUATION INPUTS (MARKET VALUE) DEPRECIATION)*
---------------- -------------- ---------------

Level 1 - Quoted Prices - Investments .......... $ 39,428,049 $--
Level 2 - Other Significant Observable Inputs .. 114,604,688 --
Level 3 - Significant Unobservable Inputs ...... -- --
------------ ---
TOTAL .......................................... $154,032,737 $--

* Other financial instruments are derivative instruments not reflected in the
Schedule of Investments, such as futures, forwards and swaps which are
valued at the unrealized appreciation/depreciation on the investment. As of
August 31, 2008 the Fund does not have any other financial instruments.

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

3. SECTION 19 NOTICES

Section 19 of the Investment Company Act of 1940 requires registered
investment companies to include a notice with the payment of a dividend if a
portion of that dividend may come from sources other than undistributed net
income (other sources could include realized gains from the sale of securities
and non-taxable return of capital). Copies of the Section 19 notices for the
Fund are available on the website at www.preferredincome.com.

The amounts and sources of distributions reported below are only estimates
and are not being provided for tax reporting purposes. Form 1099-DIV will be
sent to shareholders in January 2009 reporting the amount and tax
characterization of distributions for the 2008 calendar year.

SOURCE OF DISTRIBUTIONS AS OF 08/31/08
------------------------------------------------
NET NET RETURN TOTAL PER
INVESTMENT REALIZED OF COMMON
INCOME CAPITAL GAINS CAPITAL SHARE
---------- ------------- ------- ---------

Calendar 2008 Distributions ........ $0.5256 $0.00 $0.0184 $0.544
Percentage of Total Distributions .. 96.6% 0.0% 3.4% --

4. SUBSEQUENT EVENTS

On September 7, 2008, Fannie Mae was placed into conservatorship. The value
of preferred stock issued by this entity, which was held by the Fund, has been
adversely impacted and is not reflected in this report. From August 31, 2008 to
September 25, 2008, when the Fund sold its remaining position, the decrease in
value totaled $425,700.

On September 15, 2008, Lehman Brothers Holdings Inc. filed for bankruptcy.
On September 26, 2008, Washington Mutual Inc. filed for bankruptcy. As a result,
the Fund may not be able to recover the principal invested in securities issued
by these entities, and also does not expect to receive income payments on these
securities going forward. The value of securities issued by these entities,
which were held by the Fund, has been adversely impacted and may decline
further. The decline since August 31, 2008 is not reflected in this report.

Subsequent to the reporting period, the market values of certain
investments of the Fund have declined significantly and may decline further as a
result of the ongoing financial crisis. The market value of the Fund's
investments is reflected in the weekly net asset values reported by the Fund.

The Funds are subject to several different asset coverage requirements that
arise from the use of leverage by the Fund. The decline in asset values has
resulted in the Fund not meeting these asset coverage requirements at various
points in time since the end of the fiscal quarter. According to these
requirements, the Fund may not declare, set aside, or pay a common stock
dividend unless the asset coverage requirements are met. The Fund has delayed
the payment of the September common stock dividend as a result. To meet the
requirements and pay the delayed dividend and future dividends, the Fund has
been selling assets to raise cash, and has applied much of the proceeds to the
reduction of

Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

leverage or invested in higher quality short-term securities in anticipation of
future reductions in leverage. On October 1, 2008, the Fund announced the
redemption of $10 million of auction preferred stock that was redeemed on
October 14, 2008. The Fund may be adversely impacted by the reduction in
leverage. Updated information on the status of these requirements may be found
on the Fund website at www.preferredincome.com.

[This page intentionally left blank]

(FLAHERTY & CRUMRINE LOGO)
PREFERRED INCOME OPPORTUNITY FUND

Quarterly Report

August 31, 2008

www.preferredincome.com

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?

- If your shares are held in a Brokerage Account, contact your Broker.

- If you have physical possession of your shares in certificate form,
contact the Fund's Transfer Agent & Shareholder Servicing Agent --

PNC Global Investment Servicing
(U.S.) 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.

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 October 27, 2008
----------------------------------------------------------------------------

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.

Date October 27, 2008
----------------------------------------------------------------------------

By (Signature and Title)* /S/ R. ERIC CHADWICK
-------------------------------------------------------
R. Eric Chadwick, Chief Financial Officer,
Treasurer and Vice President
(principal financial officer)

Date October 27, 2008
----------------------------------------------------------------------------

* Print the name and title of each signing officer under his or her signature.