UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR


   CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

                  Investment Company Act file number 811-4757

                        SMITH BARNEY SECTOR SERIES INC.
               (Exact name of registrant as specified in charter)

                      125 Broad Street, New York, NY 10004
               (Address of principal executive offices) (Zip code)

                            Robert I. Frenkel, Esq.
                        Smith Barney Fund Management LLC
                            300 First Stamford Place
                               Stamford, CT 06902
                     (Name and address of agent for service)

       Registrant's telephone number, including area code: (800) 451-2010

                   Date of fiscal year end:  OCTOBER 31
                   Date of reporting period: OCTOBER 31, 2003





ITEM 1.  REPORT TO STOCKHOLDERS.

         The ANNUAL Report to Stockholders is filed herewith.


                                  SMITH BARNEY
                               SECTOR SERIES INC.
                                  SMITH BARNEY
                             FINANCIAL SERVICES FUND

               RESEARCH SERIES | ANNUAL REPORT | OCTOBER 31, 2003




                        [SMITH BARNEY MUTUAL FUNDS LOGO]


 YOUR SERIOUS MONEY. PROFESSIONALLY MANAGED.(R) is a registered service mark of
                         Citigroup Global Markets Inc.


           NOT FDIC INSURED  o  NOT BANK GUARANTEED  o  MAY LOSE VALUE




- --------------------
SMITH BARNEY FUND
MANAGEMENT LLC
- --------------------

Smith Barney Fund Management LLC is the investment manager to the fund.
Citigroup Asset Management Ltd. is the subadviser. The fund's management team
follows a systematic and rigorous approach designed to provide appropriate
exposure to the market sector.

- --------------------
FUND OBJECTIVE*
- --------------------

The fund seeks long-term capital appreciation by investing primarily in common
stocks. The fund invests at least 80% of its assets in securities of companies
principally engaged in providing financial services to consumers and industries.
These companies may include, for example, commercial banks, savings and loan
associations, broker-dealers, investment banks, investment advisers, insurance
companies, real estate-related companies, leasing companies, and consumer and
industrial finance companies.

- --------------------
FUND FACTS
- --------------------

FUND INCEPTION
- --------------------
February 28, 2000


* Since the fund focuses its investments on companies involved in financial
  services, an investment in the fund may involve a greater degree of risk than
  an investment in other mutual funds with greater diversification.


[GRAPHIC] Research Series

Annual Report  o  October 31, 2003

SMITH BARNEY
FINANCIAL SERVICES FUND


WHAT'S INSIDE

LETTER FROM THE CHAIRMAN ....................................................  1
MANAGER OVERVIEW ............................................................  2
FUND PERFORMANCE ............................................................  4
HISTORICAL PERFORMANCE ......................................................  5
SCHEDULE OF INVESTMENTS .....................................................  6
STATEMENT OF ASSETS AND LIABILITIES .........................................  8
STATEMENT OF OPERATIONS .....................................................  9
STATEMENTS OF CHANGES IN NET ASSETS ......................................... 10
NOTES TO FINANCIAL STATEMENTS ............................................... 11
FINANCIAL HIGHLIGHTS ........................................................ 16
TAX INFORMATION ............................................................. 17
INDEPENDENT AUDITORS' REPORT ................................................ 18
ADDITIONAL INFORMATION ...................................................... 19





- --------------------------------------------------------------------------------
                            LETTER FROM THE CHAIRMAN
- --------------------------------------------------------------------------------


                                                       [PHOTO OF R. JAY GERKEN]

                                                       R. JAY GERKEN, CFA

                                                       CHAIRMAN, PRESIDENT AND
                                                       CHIEF EXECUTIVE OFFICER

DEAR SHAREHOLDER,

We are pleased to present the annual report for Smith Barney Financial Services
Fund. After a torturous three-year bear market, the U.S. stock market has
rallied strongly so far in 2003 as geopolitical uncertainties eased and
investors began to look forward to better economic times. The recent performance
of the U.S. economy has supported an improvement in investor sentiment and
corporate earnings.

SPECIAL SHAREHOLDER NOTICES

It is with great sadness that we bring to your attention the passing of Alfred
J. Bianchetti, Director Emeritus, and James J. Crisona, Director Emeritus, of
the fund. Messrs. Bianchetti and Crisona, who both passed away on September 4th,
lived accomplished lives to the ages of 80 and 97, respectively. We will sorely
miss their presence and will remember the dedicated service they provided to the
fund's shareholders through their outstanding contributions as long-term members
of the Board.

The Board of Directors of the Smith Barney Sector Services, Inc. on behalf of
the fund has approved the transfer and assignment of the sub-advisory agreements
from Citi Fund Management, Inc. ("CFM") to Citigroup Asset Management Limited
("CAM Ltd.") effective August 1, 2003. The current CFM managers will continue to
manage the fund's portfolio through CAM Ltd. CAM Ltd. and CFM are both
affiliates of the fund's current manager Smith Barney Fund Management LLC
("SBFM"). CAM Ltd. and SBFM are subsidiaries of Citigroup Inc. CAM Ltd. is
located at Citigroup Centre, Canada Square, Canary Wharf, London E14 5LB, United
Kingdom.

If you have any questions about recent economic events or investing in a
recovering economy, we urge you to talk with your financial adviser. As always,
we thank you for entrusting your assets to us, and we look forward to helping
you continue to meet your financial goals. Please read on to learn more about
your fund's performance and the Manager's strategy.

Sincerely,


/s/ R. Jay Gerken

R. Jay Gerken, CFA
Chairman, President and Chief Executive Officer

NOVEMBER 19, 2003



             1  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
                                MANAGER OVERVIEW
- --------------------------------------------------------------------------------


PERFORMANCE REVIEW

For the 12 months ended October 31, 2003, Class A shares of the Smith Barney
Financial Services Fund, excluding sales charges, returned 21.33%. These shares
performed worse than the fund's unmanaged benchmark the Goldman Sachs Financials
Index,(i) which returned 24.96% for the same period. They also underperformed
the average of the fund's Lipper peer group of financial services funds, which
returned 25.65% for the same period.(1) We attribute the fund's underperformance
to relative weakness among its thrifts and mortgage finance holdings.

MARKET OVERVIEW

The financial services sector generally declined during the first half of the
fund's fiscal year, which began in November 2002, reaching a low point in March
2003 as persistent economic weakness and the build-up to the war in Iraq took
their toll on stock prices. However, the sector and the broader market recovered
strongly over the balance of the year, as investor sentiment improved against a
backdrop of low global interest rates, the quick resolution of major combat
operations in Iraq and signs of a more sustainable economic recovery in the
U.S., Japan and elsewhere. Over the year, the financials sector's greatest gains
were concentrated primarily in the capital markets and real estate sub-sectors.
Laggards included the insurance area.

The stock market over the past year has been focused on recovery prospects for
corporate profits. Companies in the capital markets and consumer finance areas
- -- many of which have suffered from weak financial positions or have operated in
a relatively depressed business environment -- tended to rebound more strongly
than others, because their operations benefited more from the general market
recovery and declining rate of defaults on consumer credit. In general, despite
attractive valuations and sound finances, stocks of higher quality, blue-chip
companies did not rally as strongly as smaller and more speculative stocks,
which were more leveraged to improving economic conditions.

                              PERFORMANCE SNAPSHOT
                             AS OF OCTOBER 31, 2003
                            (EXCLUDING SALES CHARGES)
- --------------------------------------------------------------------------------
 CLASS A SHARES
- --------------------------------------------------------------------------------
 6 Months                                                                 16.43%
- --------------------------------------------------------------------------------
 12 Months                                                                21.33%
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
 GOLDMAN SACHS FINANCIALS INDEX
- --------------------------------------------------------------------------------
 6 Months                                                                 18.74%
- --------------------------------------------------------------------------------
 12 Months                                                                24.96%
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
 AVERAGE OF LIPPER FINANCIAL SERVICES FUNDS
- --------------------------------------------------------------------------------
 6 Months                                                                 19.78%
- --------------------------------------------------------------------------------
 12 Months                                                                25.65%
- --------------------------------------------------------------------------------

Class A share returns assume the reinvestment of income dividends and capital
gains distributions at net asset value and the deduction of all fund expenses.
Returns have not been adjusted to include sales charges that may apply when
shares are purchased or the deduction of taxes that a shareholder would pay on
fund distributions. Results for other share classes may vary.

The Goldman Sachs Financial Services Index is an unmanaged market-value weighted
index comprised of companies in the banking services, brokerage, asset
management, insurance and real estate industries. Please note that an investor
cannot invest directly in an index.

Lipper Inc. is a major independent mutual-fund tracking organization. Returns
are based on the period ended October 31, 2003, calculated among 116 funds for
the six-month period and among 115 funds for the 12-month period, in the fund's
Lipper peer group including the reinvestment of dividends and capital gains and
excluding sales charges.

ALL FIGURES REPRESENT PAST PERFORMANCE AND ARE NOT A GUARANTEE OF FUTURE
RESULTS. Principal value and investment returns will fluctuate and investors'
shares, when redeemed may be worth more or less than their original cost.


(1)  Lipper Inc. is a major independent mutual-fund tracking organization.
     Returns are based on the period ended October 31, 2003, calculated among
     115 funds for the 12-month period, in the fund's Lipper financial services
     funds category including the reinvestment of dividends and capital gains
     and excluding sales charges.



             2  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




FUND OVERVIEW

Our investment approach seeks to add value relative to the fund's benchmark from
our stock selection strategy rather than through industry or thematic
allocations. In the improving market environment, we continued to focus on
companies that our analysis suggests are most attractive within their
sub-sectors. This analysis employs a long-term valuation framework that seeks to
project earnings and dividends several years into the future. While this
approach historically has produced strong results, it proved less effective in
an environment in which investors were focused primarily on short-term recovery
prospects.

Our fundamental valuation methodology led to particularly disappointing stock
selections in the mortgage finance industry. FREDDIE MAC and FANNIE MAE
underperformed the averages amid uncertainty surrounding the restatement of
prior-year financial results, accounting errors, changes in senior management
and regulatory investigations. We continue to hold Freddie Mac and Fannie Mae in
anticipation of a resolution of these issues, which we believe will cause
investors' attention to return to the more fundamental strengths of attractive
valuations in a competitively advantaged, stable and high-return business. The
fund's relatively light exposure to the real estate and diversified financials
segments also detracted from its relative performance.

On the other hand, the fund benefited from its overweighted position in consumer
finance companies, such as CAPITAL ONE FINANCIAL CORP., which has since been
eliminated from the fund, and AMERICAN EXPRESS CO., which has been retained.
J.P. MORGAN CHASE & CO. contributed strongly to performance as the capital
markets segment recovered, and we sold our position after realizing gains.
FRANKLIN RESOURCES, INC. and STATE STREET CORP. also contributed positively, and
these holdings have been retained because we see potential for further gains.
Results from our security selection strategy in the commercial banks area was
aided by strong performance from ZIONS BANCORP. and FIFTH THIRD BANCORP, but the
sub-sector's relative performance was hurt by not owning FLEETBOSTON FINANCIAL
CORP.

ADDITIONAL INFORMATION ABOUT YOUR FUND

The Fund's Adviser and some of its affiliates have received requests for
information from various government regulators regarding market timing, late
trading, fees and other mutual fund issues in connection with various
investigations. The Adviser and its affiliates are responding to those
information requests, but are not in a position to predict the outcome of these
requests and investigations.

Thank you for your investment in the Smith Barney Financial Services Fund. We
appreciate that you have entrusted us to manage your money and we value our
relationship with you.

Sincerely,

The Portfolio Management Team
Citigroup Asset Management, Limited.

NOVEMBER 19, 2003


     The information provided is not intended to be a forecast of future events,
     a guarantee of future results or investment advice. Views expressed may
     differ from those of the firm as a whole.

     Portfolio holdings and breakdowns are as of October 31, 2003 and are
     subject to change. Please refer to pages 6 through 7 for a list and
     percentage breakdown of the fund's holdings.

(i)  The Goldman Sachs Financial Services Index is an unmanaged market-value
     weighted index comprised of companies in the banking services, brokerage,
     asset management, insurance and real estate industries. Please note that an
     investor cannot invest directly in an index.

     The fund's top ten holdings as of October 31, 2003 were: Wells Fargo & Co.
     (6.44%); Berkshire Hathaway Inc., Class A Shares (6.11%); Bank of America
     Corp. (5.31%); American International Group, Inc. (5.08%); American Express
     Co. (4.82%); Fannie Mae (4.65%); The Goldman Sachs Group, Inc. (3.87%);
     Freddie Mac (3.57%); Morgan Stanley (3.39%); Washington Mutual, Inc.
     (3.11%).



             3  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
AVERAGE ANNUAL TOTAL RETURNS+ (UNAUDITED)
- --------------------------------------------------------------------------------
                                              WITHOUT SALES CHARGES(1)
                                ------------------------------------------------
                                    CLASS A           CLASS B          CLASS L
- --------------------------------------------------------------------------------
Twelve Months Ended 10/31/03         21.33%            20.39%           20.48%
- --------------------------------------------------------------------------------
Inception* through 10/31/03          10.50              9.67             9.69
- --------------------------------------------------------------------------------

                                               WITH SALES CHARGES(2)
                                ------------------------------------------------
                                    CLASS A           CLASS B          CLASS L
- --------------------------------------------------------------------------------
Twelve Months Ended 10/31/03         15.23%            15.39%           18.32%
- --------------------------------------------------------------------------------
Inception* through 10/31/03           8.97              9.24             9.38
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
CUMULATIVE TOTAL RETURNS+ (UNAUDITED)
- --------------------------------------------------------------------------------
                                                      WITHOUT SALES CHARGES(1)
- --------------------------------------------------------------------------------
Class A (Inception* through 10/31/03)                          44.34%
- --------------------------------------------------------------------------------
Class B (Inception* through 10/31/03)                          40.38
- --------------------------------------------------------------------------------
Class L (Inception* through 10/31/03)                          40.45
- --------------------------------------------------------------------------------

(1)  ASSUMES  REINVESTMENT OF ALL DIVIDENDS AND CAPITAL GAIN  DISTRIBUTIONS,  IF
     ANY,  AT NET  ASSET  VALUE  AND  DOES  NOT  REFLECT  THE  DEDUCTION  OF THE
     APPLICABLE  SALES  CHARGES  WITH  RESPECT  TO CLASS A AND L  SHARES  OR THE
     APPLICABLE CONTINGENT DEFERRED SALES CHARGES ("CDSC") WITH RESPECT TO CLASS
     B AND L SHARES.

(2)  ASSUMES  REINVESTMENT OF ALL DIVIDENDS AND CAPITAL GAIN  DISTRIBUTIONS,  IF
     ANY, AT NET ASSET  VALUE.  IN  ADDITION,  CLASS A AND L SHARES  REFLECT THE
     DEDUCTION  OF THE  MAXIMUM  INITIAL  SALES  CHARGES  OF  5.00%  AND  1.00%,
     RESPECTIVELY;  CLASS B SHARES REFLECT THE DEDUCTION OF A 5.00% CDSC,  WHICH
     APPLIES  IF SHARES ARE  REDEEMED  WITHIN  ONE YEAR FROM  PURCHASE  PAYMENT.
     THEREAFTER,  THE CDSC  DECLINES  BY 1.00% PER YEAR UNTIL NO CDSC  CHARGE IS
     INCURRED.  CLASS L SHARES ALSO REFLECT THE DEDUCTION OF A 1.00% CDSC, WHICH
     APPLIES IF SHARES ARE REDEEMED WITHIN ONE YEAR FROM PURCHASE PAYMENT.

*    INCEPTION DATES FOR CLASS A, B AND L SHARES IS FEBRUARY 28, 2000.

+    THE RETURNS  SHOWN DO NOT REFLECT THE DEDUCTION OF TAXES THAT A SHAREHOLDER
     WOULD PAY ON FUND  DISTRIBUTIONS  OR THE REDEMPTION  SHARES OF FUND SHARES.
     PERFORMANCE FIGURES MAY REFLECT FEE WAIVERS AND/OR EXPENSE  REIMBURSEMENTS.
     PAST  PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.  IN THE ABSENCE OF FEE
     WAIVERS AND/OR EXPENSE REIMBURSEMENTS, THE TOTAL RETURN WOULD BE REDUCED.





            4  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
HISTORICAL PERFORMANCE (UNAUDITED)
- --------------------------------------------------------------------------------

VALUE OF $10,000 INVESTED IN CLASS A, B AND L SHARES OF THE
SMITH BARNEY FINANCIAL SERVICES FUND VS. GOLDMAN SACHS FINANCIALS INDEX+
- --------------------------------------------------------------------------------
                         FEBRUARY 2000 -- OCTOBER 2003


          [DATA BELOW REPRESENTS A LINE CHART IN THE ORIGINAL PIECE.]



                 SMITH BARNEY         SMITH BARNEY         SMITH BARNEY
              FINANCIAL SERVICES   FINANCIAL SERVICES   FINANCIAL SERVICES
                    FUND--               FUND--               FUND--          GOLDMAN SACHS
                CLASS A SHARES       CLASS B SHARES       CLASS L SHARES     FINANCIAL INDEX
              ------------------   ------------------   ------------------   ---------------
                                                                      
2/28/00              9500               10000                  9896               10000
10/31/00            13242               13868                 13724               13919
10/31/01            11940               12406                 12276               12555
10/31/02            11301               11660                 11537               12425
10/31/03            13712               13838                 13899               15526


+    Hypothetical illustration of $10,000 invested in Class A, B and L shares at
     inception on February 28, 2000, assuming deduction of the maximum 5.00% and
     1.00%  sales  charges at the time of  investment  for Class A and L shares,
     respectively;  and the  deduction  of the  maximum  5.00%  CDSC for Class B
     shares.  It also assumes  reinvestment  of dividends and capital gains,  if
     any,  at net asset  value  through  October 31,  2003.  The  Goldman  Sachs
     Financials  Index  is  comprised  of  companies  in the  banking  services,
     brokerage,  asset  management,  insurance and real estate  industries.  The
     Index is unmanaged  and is not subject to the same  management  and trading
     expenses  as a mutual  fund.  Please note that an  investor  cannot  invest
     directly in an index.  The returns  shown do not reflect the  deduction  of
     taxes that a shareholder would pay on fund  distributions or the redemption
     of fund shares.

     ALL FIGURES  REPRESENT PAST  PERFORMANCE  AND ARE NOT A GUARANTEE OF FUTURE
     RESULTS.  The performance  data represents past  performance  including the
     investment  return  and  principal  value  of  an  investment,  which  will
     fluctuate so that an investor's shares, when redeemed, may be worth more or
     less than their original cost.  Performance figures may reflect fee waivers
     and/or expense reimbursements. In the absence of fee waivers and/or expense
     reimbursements, the total return would be reduced.



            5  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS                                         OCTOBER 31, 2003
- --------------------------------------------------------------------------------

        SHARES                    SECURITY                             VALUE
- --------------------------------------------------------------------------------
COMMON STOCK -- 99.8%
BANKS -- 36.5%
         28,990     AmSouth Bancorp.                               $    684,744
         48,185     Bank of America Corp.                             3,649,050
         22,156     Bank of Montreal                                    829,521
         35,267     Bank One Corp.                                    1,497,084
         17,202     Canadian Imperial Bank of Commerce                  771,854
          8,047     Comerica Inc.                                       414,260
         22,800     Fifth Third Bancorp                               1,321,488
         10,442     HSBC Holdings PLC, ADR                              783,881
         27,140     Huntington Bancshares Inc.                          587,852
          8,560     M&T Bank Corp.                                      803,784
         17,150     Marshall & Ilsley Corp.                             614,313
         17,809     Regions Financial Corp.                             654,481
         24,690     Royal Bank of Canada                              1,189,564
         22,698     SouthTrust Corp.                                    722,931
         21,181     The Toronto-Dominion Bank                           705,115
         46,000     U.S. Bancorp                                      1,252,120
         14,383     UnionBancal Corp.                                   779,127
         48,867     Washington Mutual, Inc.                           2,137,931
         78,593     Wells Fargo & Co.                                 4,426,358
         21,163     Zions Bancorp.                                    1,297,080
- --------------------------------------------------------------------------------
                                                                     25,122,538
- --------------------------------------------------------------------------------

COMMERCIAL SERVICES AND SUPPLIES -- 0.7%
         10,740     H&R Block, Inc.                                     505,747
- --------------------------------------------------------------------------------

DIVERSIFIED FINANCIALS -- 34.2%
         21,300     Alliance Capital Management Holding L.P.            715,041
         70,547     American Express Co.                              3,310,771
         15,336     The Bank of New York Co., Inc.                      478,330
          9,263     The Bear Stearns Cos., Inc.                         706,304
         44,613     Fannie Mae                                        3,198,306
         38,389     Franklin Resources, Inc.                          1,820,406
         43,691     Freddie Mac                                       2,452,376
         28,357     The Goldman Sachs Group, Inc.                     2,662,722
         44,808     J.P. Morgan Chase & Co.                           1,608,607
         10,062     Lehman Brothers Holdings Inc.                       724,464
         53,000     MBNA Corp.                                        1,311,750
         24,019     Mellon Financial Corp.                              717,448
         42,406     Morgan Stanley                                    2,326,817
         27,724     State Street Corp.                                1,451,629
- --------------------------------------------------------------------------------
                                                                     23,484,971
- --------------------------------------------------------------------------------






                       SEE NOTES TO FINANCIAL STATEMENTS.

            6  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS (CONTINUED)                             OCTOBER 31, 2003
- --------------------------------------------------------------------------------

        SHARES                    SECURITY                             VALUE
- --------------------------------------------------------------------------------
INSURANCE -- 26.2%
         34,580     AFLAC Inc.                                      $ 1,261,478
         24,614     The Allstate Corp.                                  972,253
         57,338     American International Group, Inc.                3,487,871
             54     Berkshire Hathaway Inc., Class A Shares*          4,201,740
          9,160     The Chubb Corp.                                     611,980
         11,836     Cincinnati Financial Corp.                          484,329
          9,096     The Hartford Financial Services Group, Inc.         499,370
          9,945     Jefferson-Pilot Corp.                               474,774
         20,621     Lincoln National Corp.                              823,397
         19,616     Marsh & McLennan Cos., Inc.                         838,584
          8,631     MBIA Inc.                                           514,494
          7,094     MGIC Investment Corp.                               363,993
         45,900     Nationwide Financial Services, Inc.               1,559,223
         12,400     The Progressive Corp.                               915,120
         12,302     Protective Life Corp.                               399,446
          8,665     XL Capital Ltd.                                     602,217
- --------------------------------------------------------------------------------
                                                                     18,010,269
- --------------------------------------------------------------------------------

REAL ESTATE -- 2.2%
         12,600     Archstone-Smith Trust                               336,420
         12,700     Equity Office Properties Trust                      355,727
          8,200     Health Care Property Investors, Inc.                382,366
          9,300     Simon Property Group, Inc.                          419,244
- --------------------------------------------------------------------------------
                                                                      1,493,757
- --------------------------------------------------------------------------------

                    TOTAL COMMON STOCK
                    (Cost -- $61,215,961)                            68,617,282
- --------------------------------------------------------------------------------

         FACE
        AMOUNT                         SECURITY                        VALUE
- --------------------------------------------------------------------------------
REPURCHASE AGREEMENT -- 0.2%
       $117,000     State Street Bank and Trust Co., 0.940%
                      due 11/3/03; Proceeds at maturity -- $117,009;
                      (Fully collateralized by Federal Home Loan
                      Bank Notes, 1.250% due 7/2/04; Market value --
                      $120,583) (Cost -- $117,000)                      117,000
- --------------------------------------------------------------------------------

                    TOTAL INVESTMENTS -- 100.0%
                    (Cost -- $61,332,961**)                         $68,734,282
- --------------------------------------------------------------------------------

  * NON-INCOME PRODUCING SECURITY.
 ** AGGREGATE COST FOR FEDERAL INCOME TAX PURPOSES IS $61,808,677.

    Abbreviation used in this schedule:
    -----------------------------------
    ADR -- American Depositary Receipt





                       SEE NOTES TO FINANCIAL STATEMENTS.

            7  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
STATEMENT OF ASSETS AND LIABILITIES                             OCTOBER 31, 2003
- --------------------------------------------------------------------------------

ASSETS:
     Investments, at value (Cost -- $61,332,961)                   $ 68,734,282
     Cash                                                                    10
     Dividends and interest receivable                                   92,559
     Receivable for Fund shares sold                                     65,375
- --------------------------------------------------------------------------------
     TOTAL ASSETS                                                    68,892,226
- --------------------------------------------------------------------------------

LIABILITIES:
     Management fee payable                                              47,022
     Payable for Fund shares reacquired                                  23,423
     Distribution plan fees payable                                      23,108
     Accrued expenses                                                    77,956
- --------------------------------------------------------------------------------
     TOTAL LIABILITIES                                                  171,509
- --------------------------------------------------------------------------------
TOTAL NET ASSETS                                                   $ 68,720,717
- --------------------------------------------------------------------------------

NET ASSETS:
     Par value of capital shares                                   $      4,732
     Capital paid in excess of par value                             64,912,285
     Undistributed net investment income                                180,332
     Accumulated net realized loss from investment transactions      (3,778,056)
     Net unrealized appreciation of investments and foreign
       currencies                                                     7,401,424
- --------------------------------------------------------------------------------
TOTAL NET ASSETS                                                   $ 68,720,717
- --------------------------------------------------------------------------------

SHARES OUTSTANDING:
     Class A                                                          1,115,885
     ---------------------------------------------------------------------------
     Class B                                                          2,189,376
     ---------------------------------------------------------------------------
     Class L                                                          1,426,666
     ---------------------------------------------------------------------------

NET ASSET VALUE:
     Class A (and redemption price)                                      $14.81
     ---------------------------------------------------------------------------
     Class B *                                                           $14.43
     ---------------------------------------------------------------------------
     Class L *                                                           $14.44
     ---------------------------------------------------------------------------

MAXIMUM PUBLIC OFFERING PRICE PER SHARE:
     Class A (net asset value plus 5.26% of net asset value per share)   $15.59
     ---------------------------------------------------------------------------
     Class L (net asset value plus 1.01% of net asset value per share)   $14.59
- --------------------------------------------------------------------------------

*    REDEMPTION  PRICE  IS NAV OF CLASS B AND L SHARES  REDUCED  BY A 5.00%  AND
     1.00%  CDSC,  RESPECTIVELY,  IF SHARES  ARE  REDEEMED  WITHIN ONE YEAR FROM
     PURCHASE PAYMENT (SEE NOTE 2).




                       SEE NOTES TO FINANCIAL STATEMENTS.

             8  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
STATEMENT OF OPERATIONS                      FOR THE YEAR ENDED OCTOBER 31, 2003
- --------------------------------------------------------------------------------

INVESTMENT INCOME:
     Dividends                                                      $ 1,409,116
     Interest                                                             3,058
     Less: Foreign withholding tax                                      (17,201)
- --------------------------------------------------------------------------------
     TOTAL INVESTMENT INCOME                                          1,394,973
- --------------------------------------------------------------------------------

EXPENSES:
     Distribution plan fees (Note 6)                                    528,796
     Management fee (Note 2)                                            512,889
     Shareholder servicing fees (Note 6)                                 98,308
     Audit and legal                                                     27,758
     Custody                                                             19,080
     Directors' fees                                                     13,051
     Registration fees                                                    5,427
     Other                                                                5,910
- --------------------------------------------------------------------------------
     TOTAL EXPENSES                                                   1,211,219
- --------------------------------------------------------------------------------

NET INVESTMENT INCOME                                                   183,754
- --------------------------------------------------------------------------------

REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS
AND FOREIGN CURRENCIES (NOTE 3):
     Realized Gain (Loss) From:
        Investment transactions                                      (3,191,303)
        Foreign currency transactions                                       900
- --------------------------------------------------------------------------------
     NET REALIZED LOSS                                               (3,190,403)
- --------------------------------------------------------------------------------

     Change in Net Unrealized Appreciation (Depreciation) of
       Investments:
        Beginning of year                                            (7,766,245)
        End of year                                                   7,401,424
- --------------------------------------------------------------------------------
     INCREASE IN NET UNREALIZED APPRECIATION                         15,167,669
- --------------------------------------------------------------------------------
NET GAIN ON INVESTMENTS AND FOREIGN CURRENCIES                       11,977,266
- --------------------------------------------------------------------------------
INCREASE IN NET ASSETS FROM OPERATIONS                              $12,161,020
- --------------------------------------------------------------------------------




                       SEE NOTES TO FINANCIAL STATEMENTS.

            9  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
STATEMENTS OF CHANGES IN NET ASSETS              FOR THE YEARS ENDED OCTOBER 31,
- --------------------------------------------------------------------------------



                                                                              2003                2002
- ----------------------------------------------------------------------------------------------------------
                                                                                        
OPERATIONS:
     Net investment income (loss)                                         $   183,754         $  (205,916)
     Net realized gain (loss)                                              (3,190,403)          1,101,240
     Increase (decrease) in net unrealized appreciation                    15,167,669          (5,088,640)
- ----------------------------------------------------------------------------------------------------------
     INCREASE (DECREASE) IN NET ASSETS FROM OPERATIONS                     12,161,020          (4,193,316)
- ----------------------------------------------------------------------------------------------------------

DISTRIBUTIONS TO SHAREHOLDERS FROM (NOTE 7):
     Net realized gains                                                    (1,303,919)         (4,375,419)
- ----------------------------------------------------------------------------------------------------------
     DECREASE IN NET ASSETS FROM DISTRIBUTIONS TO SHAREHOLDERS             (1,303,919)         (4,375,419)
- ----------------------------------------------------------------------------------------------------------

FUND SHARE TRANSACTIONS (NOTE 8):
     Net proceeds from sale of shares                                       6,357,450          16,096,034
     Net asset value of shares issued for reinvestment of dividends         1,234,602           4,157,273
     Cost of shares reacquired                                            (14,924,847)        (25,373,865)
- ----------------------------------------------------------------------------------------------------------
     DECREASE IN NET ASSETS FROM FUND SHARE TRANSACTIONS                   (7,332,795)         (5,120,558)
- ----------------------------------------------------------------------------------------------------------

INCREASE (DECREASE) IN NET ASSETS                                           3,524,306         (13,689,293)

NET ASSETS:
     Beginning of year                                                     65,196,411          78,885,704
- ----------------------------------------------------------------------------------------------------------
     END OF YEAR*                                                         $68,720,717         $65,196,411
- ----------------------------------------------------------------------------------------------------------
*  Includes undistributed net investment income of:                          $180,332                  --
- ----------------------------------------------------------------------------------------------------------
*  Includes accumulated net investment loss of:                                    --             $(4,214)
- ----------------------------------------------------------------------------------------------------------










                       SEE NOTES TO FINANCIAL STATEMENTS.

           10  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report





- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------

1. Significant Accounting Policies

The Smith Barney Financial Services Fund ("Fund"), a separate investment fund of
the Smith Barney  Sector Series Inc.  ("Company"),  a Maryland  corporation,  is
registered  under  the  Investment  Company  Act  of  1940,  as  amended,  as  a
non-diversified, open-end management investment company. The Company consists of
this Fund and two other separate  investment funds: Smith Barney Health Sciences
Fund and Smith Barney  Technology  Fund. The financial  statements and financial
highlights for the other funds are presented in separate shareholder reports.

The significant  accounting policies  consistently followed by the Fund are: (a)
security  transactions are accounted for on trade date; (b) securities traded on
national  securities  markets  are valued at the  closing  prices in the primary
exchange  on which  they are  traded;  securities  listed or  traded on  certain
foreign  exchanges or other  markets  whose  operations  are similar to the U.S.
over-the-counter  market  (including  securities  listed on exchanges  where the
primary market is believed to be  over-the-counter)  and securities for which no
sale was  reported on that date are valued at the mean between the bid and asked
prices;  securities listed on the NASDAQ National Market System for which market
quotations  are available are valued at the official  closing price or, if there
is no official closing price that day, at the last sales price. Securities which
are  listed  or traded on more than one  exchange  or market  are  valued at the
quotations  on the exchange or market  determined  to be the primary  market for
such  securities;  (c) securities for which market  quotations are not available
will be valued in good  faith at fair  value by or under  the  direction  of the
Board of Directors;  (d) securities  maturing  within 60 days are valued at cost
plus accreted discount,  or minus amortized premium,  which approximates  value;
(e) the  accounting  records of the Fund are  maintained  in U.S.  dollars.  All
assets and  liabilities  denominated in foreign  currencies are translated  into
U.S.  dollars  based on the rate of exchange  of such  currencies  against  U.S.
dollars on the date of valuation.  Purchases and sales of securities, and income
and expenses are  translated  at the rate of exchange  quoted on the  respective
date that such transactions are recorded.  Differences between income or expense
amounts  recorded  and  collected  or paid are  adjusted  when  reported  by the
custodian;  (f)  interest  income,  adjusted  for  amortization  of premium  and
accretion of discount,  is recorded on an accrual basis;  (g) dividend income is
recorded  on  the  ex-dividend  date;  foreign  dividends  are  recorded  on the
ex-dividend date or as soon as practical after the Fund determines the existence
of a  dividend  declaration  after  exercising  reasonable  due  diligence;  (h)
dividends and  distributions  to  shareholders  are recorded on the  ex-dividend
date; the Fund distributes  dividends and capital gains, if any,  annually;  (i)
gains or losses on the sale of securities  are  calculated by using the specific
identification  method;  (j) class specific  expenses are charged to each class;
management fees and general Fund expenses are allocated on the basis of relative
net assets of each class or on another  reasonable  basis;  (k) the character of
income and gains to be distributed  is determined in accordance  with income tax
regulations which may differ from accounting  principles  generally  accepted in
the United States of America. At October 31, 2003,  reclassifications  were made
to the Fund's capital  accounts to reflect  permanent  book/tax  differences and
income and gains available for  distributions  under income tax  regulations.Net
investment  income,  net realized gains and net assets were not affected by this
adjustment; (l) the Fund intends to comply with the applicable provisions of the
Internal  Revenue Code of 1986, as amended,  pertaining to regulated  investment
companies and to make  distributions of taxable income  sufficient to relieve it
from  substantially  all Federal income and excise taxes;  and (m) estimates and
assumptions are required to be made regarding assets, liabilities and changes in
net assets  resulting from  operations  when financial  statements are prepared.
Changes in the economic environment,  financial markets and any other parameters
used in determining these estimates could cause actual results to differ.

In  addition,  the Fund may enter into  forward  exchange  contracts in order to
hedge against foreign currency risk. These contracts are marked-to-market daily,
by recognizing the difference between the contract exchange rate and the current
market  rate as an  unrealized  gain or  loss.  Realized  gains  or  losses  are
recognized when contracts are settled or offset by entering into



            11  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report





- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

another  forward  exchange  contract.  The Fund from time to time may also enter
into  options  and/or  futures  contracts  typically to hedge market or currency
risk.

2. Management Agreement and Other Transactions

Smith Barney Fund Management LLC ("SBFM"), an indirect  wholly-owned  subsidiary
of Citigroup  Inc.  ("Citigroup"),  acts as investment  manager to the Fund. The
Fund pays SBFM a  management  fee  calculated  at an annual rate of 0.80% of the
Fund's average daily net assets.  This fee is calculated daily and paid monthly.
SBFM has delegated the daily management of the Fund to Citi Fund Management Inc.
("CFM"),  an affiliate of SBFM. For services provided to the Fund, SBFM pays CFM
a  sub-advisory  fee calculated at an annual rate of 0.50% of the Fund's average
daily net assets. The Board of Directors of the Company,  on behalf of the Fund,
has approved the transfer and assignment of the sub-advisory  agreement from CFM
to Citigroup Asset  Management Ltd. ("CAM Ltd."),  effective August 1, 2003. The
current CFM managers  will continue to manage the Fund's  portfolio  through CAM
Ltd.

Citicorp Trust Bank, fsb. ("CTB"), another subsidiary of Citigroup,  acts as the
Fund's transfer agent.  PFPC Inc.  ("PFPC") and Primerica  Shareholder  Services
("PSS"), another subsidiary of Citigroup, act as the Fund's sub-transfer agents.
CTB receives  account fees and asset-based  fees that vary according to the size
and type of account. PFPC and PSS are responsible for shareholder  recordkeeping
and financial  processing for all shareholder  accounts and are paid by CTB. For
the year ended October 31, 2003, the Fund paid transfer agent fees of $64,969 to
CTB.

Citigroup  Global Markets Inc.  ("CGM")  (formerly known as Salomon Smith Barney
Inc.) and PFS  Distributors,  Inc., both of which are subsidiaries of Citigroup,
act as the Fund's distributors. For the year ended October 31, 2003, CGM and its
affiliates did not receive any brokerage commissions.

There are  maximum  initial  sales  charges of 5.00% and 1.00% for Class A and L
shares,  respectively.  There is a contingent  deferred sales charge ("CDSC") of
5.00% on Class B shares, which applies if redemption occurs within one year from
purchase  payment  and  declines  thereafter  by 1.00% per year until no CDSC is
incurred.  Class L shares also have a 1.00% CDSC,  which  applies if  redemption
occurs within one year from purchase payment. In addition, Class A shares have a
1.00% CDSC,  which  applies if  redemption  occurs within one year from purchase
payment. This CDSC only applies to those purchases of Class A shares which, when
combined with current holdings of Class A shares,  equal or exceed $1,000,000 in
the aggregate. These purchases do not incur an initial sales charge.

For the year ended  October 31,  2003,  CGM and its  affiliates  received  sales
charges of approximately $58,000 and $2,000 on sales of the Fund's Class A and L
shares,  respectively.  In addition,  for the year ended October 31, 2003, CDSCs
paid to CGM and its affiliates were approximately $94,000 for Class B shares.

All officers  and one Director of the Company are  employees of Citigroup or its
affiliates.

3. Investments

During the year ended  October 31, 2003,  the  aggregate  cost of purchases  and
proceeds  from  sales  of   investments   (including   maturities  of  long-term
investments, but excluding short-term investments) were as follows:

- --------------------------------------------------------------------------------
Purchases                                                           $14,047,485
- --------------------------------------------------------------------------------
Sales                                                                22,828,411
- --------------------------------------------------------------------------------



           12   SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

At  October  31,  2003,  the  aggregate  gross   unrealized   appreciation   and
depreciation of investments for Federal income tax purposes were as follows:

- --------------------------------------------------------------------------------
Gross unrealized appreciation                                       $10,260,655
Gross unrealized depreciation                                        (3,335,050)
- --------------------------------------------------------------------------------
Net unrealized appreciation                                         $ 6,925,605
- --------------------------------------------------------------------------------


4. Repurchase Agreements

The Fund  purchases  (and the custodian  takes  possession  of) U.S.  government
securities  from  securities   dealers  subject  to  agreements  to  resell  the
securities to the sellers at a future date  (generally,  the next business day),
at  an  agreed  upon  higher  repurchase  price.  The  Fund  requires  continual
maintenance  of the market value (plus  accrued  interest) of the  collateral in
amounts at least equal to the repurchase price.


5. Concentration of Risk

The Fund  normally  invests  at least 80% of its  assets in  financial  services
related  investments.  As a result  of this  concentration  policy,  the  Fund's
investments  may be subject to greater risk and market  fluctuation  than a fund
that  invests  in  securities   representing   a  broader  range  of  investment
alternatives.


6. Class Specific Expenses

Pursuant  to a Rule 12b-1  Distribution  Plan,  the Fund pays a service fee with
respect to Class A, B and L shares  calculated at an annual rate of 0.25% of the
average  daily  net  assets  of each  respective  class.  The Fund  also  pays a
distribution  fee with respect to Class B and L shares  calculated  at an annual
rate of 0.75% of the average daily net assets of each class,  respectively.  For
the year ended October 31, 2003, total Rule 12b-1  Distribution Plan fees, which
are accrued daily and paid monthly, were as follows:

                                                 CLASS A     CLASS B    CLASS L
- --------------------------------------------------------------------------------
Rule 12b-1 Distribution Plan Fees                $37,438    $292,277    $199,081
- --------------------------------------------------------------------------------

For the year ended October 31, 2003,  total Shareholder  Servicing fees were as
follows:

                                                 CLASS A     CLASS B    CLASS L
- --------------------------------------------------------------------------------
Shareholder Servicing Fees                       $23,016    $ 44,840    $ 30,452
- --------------------------------------------------------------------------------


7. Distributions Paid to Shareholders by Class

                                              YEAR ENDED           YEAR ENDED
                                           OCTOBER 31, 2003     OCTOBER 31, 2002
- --------------------------------------------------------------------------------
NET REALIZED GAINS
Class A                                       $  291,292           $  892,781
Class B                                          587,336            1,885,444
Class L                                          425,291            1,597,194
- --------------------------------------------------------------------------------
Total                                         $1,303,919           $4,375,419
- --------------------------------------------------------------------------------



            13  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

8. Capital Shares

At October 31, 2003, the Fund had 400 million shares of capital stock authorized
with a par value of $0.001 per share. The Fund has the ability to issue multiple
classes of shares. Each share of a class represents an identical interest in the
Fund and has the same  rights,  except  that each class bears  certain  expenses
specifically related to the distribution of its shares.

Transactions in shares of each class were as follows:



                                             YEAR ENDED                       YEAR ENDED
                                          OCTOBER 31, 2003                  OCTOBER 31, 2002
                                     -------------------------         --------------------------
                                      SHARES        AMOUNT               SHARES        AMOUNT
- -------------------------------------------------------------------------------------------------
                                                                         
CLASS A
Shares sold                           193,058     $ 2,484,197            505,631     $ 7,118,929
Shares issued on reinvestment          22,918         273,645             60,450         855,366
Shares reacquired                    (312,740)     (4,042,964)          (511,025)     (6,967,973)
- -------------------------------------------------------------------------------------------------
Net Increase (Decrease)               (96,764)    $(1,285,122)            55,056     $ 1,006,322
- -------------------------------------------------------------------------------------------------

CLASS B
Shares sold                           264,664     $ 3,299,291            446,749     $ 6,176,589
Shares issued on reinvestment          47,116         552,196            126,216       1,765,764
Shares reacquired                    (486,621)     (6,121,078)          (659,117)     (8,826,580)
- -------------------------------------------------------------------------------------------------
Net Decrease                         (174,841)    $(2,269,591)           (86,152)    $  (884,227)
- -------------------------------------------------------------------------------------------------

CLASS L
Shares sold                            45,324     $   573,962            197,150     $ 2,800,516
Shares issued on reinvestment          34,877         408,761            109,803       1,536,143
Shares reacquired                    (382,238)     (4,760,805)          (703,438)     (9,579,312)
- -------------------------------------------------------------------------------------------------
Net Decrease                         (302,037)    $(3,778,082)          (396,485)    $(5,242,653)
- -------------------------------------------------------------------------------------------------



9. Capital Loss Carryforward

At  October  31,  2003,   the  Fund  had,  for  Federal   income  tax  purposes,
approximately  $3,302,000  of unused  capital  loss  carryforwards  available to
offset future  capital  gains,  expiring on October 31, 2011. To the extent that
these carryforward  losses are used to offset capital gains, it is probable that
the gains so offset will not be distributed.


10. Income Tax Information and Distributions to Shareholders

At October 31, 2003, the tax basis components of distributable earnings were:

- --------------------------------------------------------------------------------
Undistributed ordinary income                                        $  182,674
- --------------------------------------------------------------------------------
Accumulated capital losses                                           (3,302,340)
- --------------------------------------------------------------------------------
Unrealized appreciation                                               6,925,708
- --------------------------------------------------------------------------------

The  difference  between  book basis and tax basis  unrealized  appreciation  is
attributable primarily to wash sales loss deferrals.

The tax character of  distributions  paid during the year ended October 31, 2003
was:

- --------------------------------------------------------------------------------
Ordinary income                                                      $      108
Long-term capital gains                                               1,303,811
- --------------------------------------------------------------------------------
Total                                                                $1,303,919
- --------------------------------------------------------------------------------



            14  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

11. Subsequent Event

The Fund has received the following  information from Citigroup Asset Management
("CAM"),  the  Citigroup  business  unit which  includes  the Fund's  Investment
Manager and other  investment  advisory  companies,  all of which are  indirect,
wholly-owned  subsidiaries of Citigroup.  CAM is reviewing its entry, through an
affiliate,  into the transfer  agent  business in the period  1997-1999.  As CAM
currently  understands  the facts, at the time CAM decided to enter the transfer
agent  business,  CAM  sub-contracted  for a period of five years certain of the
transfer agency services to a third party and also concluded a revenue guarantee
agreement  with this  sub-contractor  providing  that the  sub-contractor  would
guarantee  certain  benefits to CAM or its  affiliates  (the "Revenue  Guarantee
Agreement").  In connection with the subsequent purchase of the sub-contractor's
business by an affiliate of the current  sub-transfer  agent (PFPC Inc.) used by
CAM on many of the  funds it  manages,  this  Revenue  Guarantee  Agreement  was
amended  eliminating those benefits in exchange for arrangements that included a
one-time payment from the sub-contractor.

The Boards of CAM-managed  funds (the "Boards") were not informed of the Revenue
Guarantee  Agreement with the  sub-contractor  at the time the Boards considered
and approved the transfer agent  arrangements.  Nor were the Boards  informed of
the subsequent amendment to the Revenue Guarantee Agreement when that occurred.

CAM has begun to take corrective  actions.  CAM will pay to the applicable funds
$16  million  (plus  interest)  that CAM and its  affiliates  received  from the
Revenue  Guarantee  Agreement and its  amendment.  CAM also plans an independent
review to verify that the transfer agency fees charged by CAM were fairly priced
as compared to competitive  alternatives.  CAM is instituting new procedures and
making changes  designed to ensure no similar  arrangements  are entered into in
the future.

CAM has  briefed  the  SEC,  the New  York  State  Attorney  General  and  other
regulators  with  respect to this  matter,  as well as the U.S.  Attorney who is
investigating the matter.  CAM is cooperating with  governmental  authorities on
this matter, the ultimate outcome of which is not yet determinable.







            15  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------

FOR A SHARE OF EACH  CLASS OF CAPITAL  STOCK  OUTSTANDING  THROUGHOUT  EACH YEAR
ENDED OCTOBER 31, UNLESS OTHERWISE NOTED:



CLASS A SHARES                                      2003(1)          2002(1)            2001            2000(2)
- ------------------------------------------------------------------------------------------------------------------
                                                                                           
NET ASSET VALUE, BEGINNING OF YEAR                 $ 12.46          $ 13.87           $ 15.89          $ 11.40
- ------------------------------------------------------------------------------------------------------------------
INCOME (LOSS) FROM OPERATIONS:
   Net investment income(3)                           0.11             0.05              0.06             0.05
   Net realized and unrealized gain (loss)            2.49            (0.70)            (1.55)            4.44
- ------------------------------------------------------------------------------------------------------------------
Total Income (Loss) From Operations                   2.60            (0.65)            (1.49)            4.49
- ------------------------------------------------------------------------------------------------------------------
LESS DISTRIBUTIONS FROM:
   Net investment income                                --               --             (0.06)              --
   Net realized gains                                (0.25)           (0.76)            (0.47)              --
- ------------------------------------------------------------------------------------------------------------------
Total Distributions                                  (0.25)           (0.76)            (0.53)              --
- ------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR                       $ 14.81          $ 12.46           $ 13.87          $ 15.89
- ------------------------------------------------------------------------------------------------------------------
TOTAL RETURN(4)                                      21.33%           (5.35)%           (9.83)%          39.39%++
- ------------------------------------------------------------------------------------------------------------------
NET ASSETS, END OF YEAR (000s)                     $16,524          $15,105           $16,050          $14,276
- ------------------------------------------------------------------------------------------------------------------
RATIOS TO AVERAGE NET ASSETS:
   Expenses(3)(5)                                     1.31%            1.49%             1.50%            1.51%+
   Net investment income                              0.86             0.35              0.39             0.69+
- ------------------------------------------------------------------------------------------------------------------
PORTFOLIO TURNOVER RATE                                 22%              20%               42%              26%
- ------------------------------------------------------------------------------------------------------------------


CLASS B SHARES                                      2003(1)          2002(1)            2001            2000(2)
- ------------------------------------------------------------------------------------------------------------------
                                                                                           
NET ASSET VALUE, BEGINNING OF YEAR                 $ 12.24          $ 13.73           $ 15.81          $ 11.40
- ------------------------------------------------------------------------------------------------------------------
INCOME (LOSS) FROM OPERATIONS:
- ------------------------------------------------------------------------------------------------------------------
   Net investment gain (loss)(3)                      0.01            (0.06)            (0.05)           (0.01)
   Net realized and unrealized gain (loss)            2.43            (0.67)            (1.55)            4.42
- ------------------------------------------------------------------------------------------------------------------
Total Income (Loss) From Operations                   2.44            (0.73)            (1.60)            4.41
- ------------------------------------------------------------------------------------------------------------------
LESS DISTRIBUTIONS FROM:
   Net investment income                                --               --             (0.01)              --
   Net realized gains                                (0.25)           (0.76)            (0.47)              --
- ------------------------------------------------------------------------------------------------------------------
Total Distributions                                  (0.25)           (0.76)            (0.48)              --
- ------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR                       $ 14.43          $ 12.24           $ 13.73          $ 15.81
- ------------------------------------------------------------------------------------------------------------------
TOTAL RETURN(4)                                      20.39%           (6.02)%          (10.54)%          38.68%++
- ------------------------------------------------------------------------------------------------------------------
NET ASSETS, END OF YEAR (000s)                     $31,602          $28,933           $33,649          $28,696
- ------------------------------------------------------------------------------------------------------------------
RATIOS TO AVERAGE NET ASSETS:
   Expenses(3)(5)                                     2.06%            2.24%             2.25%            2.26%+
   Net investment income (loss)                       0.11            (0.40)            (0.36)           (0.07)+
- ------------------------------------------------------------------------------------------------------------------
PORTFOLIO TURNOVER RATE                                 22%              20%               42%              26%
- ------------------------------------------------------------------------------------------------------------------


(1)  PER SHARE AMOUNTS HAVE BEEN  CALCULATED  USING THE MONTHLY  AVERAGE  SHARES
     METHOD.

(2)  FOR THE PERIOD FEBRUARY 28, 2000 (INCEPTION DATE) TO OCTOBER 31, 2000.

(3)  THE MANAGER WAIVED ALL OR A PORTION OF ITS FEES AND/OR REIMBURSED  EXPENSES
     FOR THE YEAR ENDED  OCTOBER 31, 2001 AND THE PERIOD ENDED OCTOBER 31, 2000.
     IF SUCH FEES WERE NOT WAIVED AND  EXPENSES  NOT  REIMBURSED,  THE PER SHARE
     DECREASES TO NET INVESTMENT INCOME AND THE ACTUAL EXPENSE RATIOS WOULD HAVE
     BEEN AS FOLLOWS:

                           Per Share Decreases       Expense Ratios Without Fee
                         to Net Investment Income     Waivers and Reimbursements
                         ------------------------    ---------------------------
                           2001           2000          2001           2000
                           -----          -----         -----          -----
    Class A Shares        $0.01          $0.00*         1.53%          2.06%+
    Class B Shares         0.01           0.05          2.28           2.81+

(4)  PERFORMANCE FIGURES MAY REFLECT FEE WAIVERS AND/OR EXPENSE  REIMBURSEMENTS.
     PAST  PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.  IN THE ABSENCE OF FEE
     WAIVERS AND/OR EXPENSE REIMBURSEMENTS, THE TOTAL RETURN WOULD BE REDUCED.

(5)  AS A RESULT OF A  VOLUNTARY  EXPENSE  LIMITATION,  THE RATIO OF EXPENSES TO
     AVERAGE  NET  ASSETS  WILL NOT  EXCEED  1.50%  AND  2.25% FOR CLASS A AND B
     SHARES, RESPECTIVELY.

*    AMOUNT REPRESENTS LESS THAN $0.01 PER SHARE.

++   TOTAL  RETURN IS NOT  ANNUALIZED,  AS IT MAY NOT BE  REPRESENTATIVE  OF THE
     TOTAL RETURN FOR THE YEAR.

+    ANNUALIZED.



           16  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS (CONTINUED)
- --------------------------------------------------------------------------------

FOR A SHARE OF EACH  CLASS OF CAPITAL  STOCK  OUTSTANDING  THROUGHOUT  EACH YEAR
ENDED OCTOBER 31, UNLESS OTHERWISE NOTED:



CLASS L SHARES                                   2003(1)          2002(1)            2001            2000(2)
- --------------------------------------------------------------------------------------------------------------
                                                                                        
NET ASSET VALUE, BEGINNING OF YEAR              $ 12.24          $ 13.73           $ 15.81          $ 11.40
- --------------------------------------------------------------------------------------------------------------
INCOME (LOSS) FROM OPERATIONS:
   Net investment gain (loss)(3)                   0.01            (0.06)            (0.05)           (0.01)
   Net realized and unrealized gain (loss)         2.44            (0.67)            (1.55)            4.42
- --------------------------------------------------------------------------------------------------------------
Total Income (Loss) From Operations                2.45            (0.73)            (1.60)            4.41
- --------------------------------------------------------------------------------------------------------------
LESS DISTRIBUTIONS FROM:
   Net investment income                             --               --             (0.01)              --
   Net realized gains                             (0.25)           (0.76)            (0.47)              --
- --------------------------------------------------------------------------------------------------------------
Total Distributions                               (0.25)           (0.76)            (0.48)              --
- --------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR                    $ 14.44          $ 12.24           $ 13.73          $ 15.81
- --------------------------------------------------------------------------------------------------------------
TOTAL RETURN(4)                                   20.48%           (6.02)%          (10.55)%          38.68%++
- --------------------------------------------------------------------------------------------------------------
NET ASSETS, END OF YEAR (000s)                  $20,595          $21,158           $29,187          $30,863
- --------------------------------------------------------------------------------------------------------------
RATIOS TO AVERAGE NET ASSETS:
   Expenses(3)(5)                                  2.07%            2.24%             2.25%            2.26%+
   Net investment income (loss)                    0.11            (0.41)            (0.36)           (0.08)+
- --------------------------------------------------------------------------------------------------------------
PORTFOLIO TURNOVER RATE                              22%              20%               42%              26%
- --------------------------------------------------------------------------------------------------------------


(1)  PER SHARE AMOUNTS HAVE BEEN  CALCULATED  USING THE MONTHLY  AVERAGE  SHARES
     METHOD.

(2)  FOR THE PERIOD FEBRUARY 28, 2000 (INCEPTION DATE) TO OCTOBER 31, 2000.

(3)  THE MANAGER WAIVED ALL OR A PORTION OF ITS FEES AND/OR REIMBURSED  EXPENSES
     FOR THE YEAR ENDED  OCTOBER 31, 2001 AND THE PERIOD ENDED OCTOBER 31, 2000.
     IF SUCH FEES WERE NOT WAIVED AND  EXPENSES  NOT  REIMBURSED,  THE PER SHARE
     INCREASES TO NET  INVESTMENT  LOSS AND THE ACTUAL EXPENSE RATIOS WOULD HAVE
     BEEN AS FOLLOWS:

                                                               Expense Ratios
                                Per Share Increases         Without Fee Waivers
                              to Net Investment Loss        and Reimbursements
                               ---------------------       ---------------------
                                 2001        2000             2001       2000
                                -----        -----            -----      -----
     Class L Shares             $0.01        $0.06            2.29%      2.81%+

(4)  PERFORMANCE FIGURES MAY REFLECT FEE WAIVERS AND/OR EXPENSE  REIMBURSEMENTS.
     PAST  PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.  IN THE ABSENCE OF FEE
     WAIVERS AND/OR EXPENSE REIMBURSEMENTS, THE TOTAL RETURN WOULD BE REDUCED.

(5)  AS A RESULT OF A  VOLUNTARY  EXPENSE  LIMITATION,  THE RATIO OF EXPENSES TO
     AVERAGE NET ASSETS WILL NOT EXCEED 2.25% FOR CLASS L SHARES.

++   TOTAL  RETURN IS NOT  ANNUALIZED,  AS IT MAY NOT BE  REPRESENTATIVE  OF THE
     TOTAL RETURN FOR THE YEAR.

+    ANNUALIZED.




- --------------------------------------------------------------------------------
TAX INFORMATION (AUDITED)
- --------------------------------------------------------------------------------

For Federal tax  purposes the Fund hereby  designates  for the fiscal year ended
October 31, 2003:

     o   A corporate dividends received deduction of 100.00%.

     o   Total long-term capital gain distributions paid of $1,303,811.





            17  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
INDEPENDENT AUDITORS' REPORT
- --------------------------------------------------------------------------------


TO THE SHAREHOLDERS AND BOARD OF DIRECTORS
OF THE SMITH BARNEY SECTOR SERIES INC.:

We have audited the accompanying statement of assets and liabilities,  including
the schedule of investments,  of Smith Barney  Financial  Services Fund of Smith
Barney  Sector  Series Inc.  ("Fund") as of October  31,  2003,  and the related
statement of operations  for the year then ended,  the  statements of changes in
net  assets  for each of the years in the  two-year  period  then  ended and the
financial  highlights for each of the years in the three-year  period then ended
and for the period February 28, 2000 (commencement of operations) to October 31,
2000. These financial statements and financial highlights are the responsibility
of the Fund's  management.  Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the  United  States of  America.  Those  standards  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements and financial highlights are free of material misstatement.  An audit
includes  examining,  on a test  basis,  evidence  supporting  the  amounts  and
disclosures in the financial statements. Our procedures included confirmation of
securities  owned as of October 31, 2003, by  correspondence  with the custodian
and broker. An audit also includes assessing the accounting  principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of the
Fund as of October 31, 2003, and the results of its operations for the year then
ended,  the  changes  in its net  assets  for each of the years in the  two-year
period  then  ended and the  financial  highlights  for each of the years in the
three-year period then ended and for the period February 28, 2000 to October 31,
2000, in conformity with accounting  principles generally accepted in the United
States of America.


                                                /s/ KPMG LLP
New York, New York
December 10, 2003






           18  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
ADDITIONAL INFORMATION (UNAUDITED)
- --------------------------------------------------------------------------------

INFORMATION  ABOUT DIRECTORS AND OFFICERS

The business and affairs of the Smith Barney  Financial  Services  Fund ("Fund")
are managed under the direction of the Board of Directors of Smith Barney Sector
Series Inc. ("Company"). Information pertaining to the Directors and Officers of
the Company is set forth below. The Statement of Additional Information includes
additional information about the Directors and is available without charge, upon
request by calling the Fund's  transfer  agent  (Citicorp  Trust  Bank,  fsb. at
1-800-451-2010) or the Fund's sub-transfer agent (Primerica Shareholder Services
at 1-800-544-5445).



                                                                                                     NUMBER OF
                                                                             PRINCIPAL             PORTFOLIOS IN        OTHER
                                      POSITION(S)    TERM OF OFFICE*       OCCUPATION(S)            FUND COMPLEX    DIRECTORSHIPS
                                          HELD        AND LENGTH OF         DURING PAST             OVERSEEN BY        HELD BY
 NAME, ADDRESS AND AGE                 WITH FUND       TIME SERVED           FIVE YEARS               DIRECTOR         DIRECTOR
- -----------------------------------------------------------------------------------------------------------------------------------

                                                                                                   
NON-INTERESTED DIRECTORS:

Herbert Barg                           Director          Since        Retired                            42              None
1460 Drayton Lane                                        2000
Wynnewood, PA 19096
Age 80

Dwight B. Crane                        Director          Since        Professor, Harvard Business        49              None
Harvard Business School                                  2000         School
Soldiers Field
Morgan Hall #375
Boston, MA 02163
Age 66

Burt N. Dorsett                        Director          Since        President-- Dorsett McCabe         27              None
201 East 62nd Street                                     2000         Capital Management Inc.;
New York, NY 10021                                                    Chief Investment Officer of
Age 73                                                                Leeb Capital Management, Inc.
                                                                      (1999-Present)

Elliot S. Jaffe                        Director          Since        Chairman of                        27       Zweig Total Return
The Dress Barn Inc.                                      2000         The Dress Barn Inc.                         Fund; Zweig Fund,
Executive Office                                                                                                  Inc.
30 Dunnigan Drive
Suffern, NY 10901
Age 77

Stephen E. Kaufman                     Director          Since        Attorney                           56              None
Stephen E. Kaufman PC                                    2000
277 Park Avenue, 47th Floor
New York, NY 10172
Age 71

Joseph J. McCann                       Director          Since        Retired                            27              None
200 Oak Park Place                                       2000
Suite One
Pittsburgh, PA 15243
Age 73

Cornelius C. Rose, Jr.                 Director          Since        Chief Executive Officer--          27              None
P.O. Box 5388                                            2000         Performance Learning
West Lebanon, NH 03784                                                Systems
Age 71





           19  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
ADDITIONAL INFORMATION (UNAUDITED) (CONTINUED)
- --------------------------------------------------------------------------------



                                                                                                     NUMBER OF
                                                                             PRINCIPAL             PORTFOLIOS IN        OTHER
                                      POSITION(S)    TERM OF OFFICE*       OCCUPATION(S)            FUND COMPLEX    DIRECTORSHIPS
                                          HELD        AND LENGTH OF         DURING PAST             OVERSEEN BY        HELD BY
 NAME, ADDRESS AND AGE                 WITH FUND       TIME SERVED           FIVE YEARS               DIRECTOR         DIRECTOR
- -----------------------------------------------------------------------------------------------------------------------------------

                                                                                                   
INTERESTED DIRECTOR:

R. Jay Gerken, CFA**                   Chairman,         Since        Managing Director of Citigroup     220             None
Citigroup Asset Management ("CAM")     President and     2002         Global Markets Inc. ("CGM");
399 Park Avenue, 4th Floor             Chief Executive                Chairman, President and Chief
New York, NY 10022                     Officer                        Executive Officer of Smith
Age 52                                                                Barney Fund Management LLC
                                                                      ("SBFM"), Travelers Investment
                                                                      Adviser, Inc. ("TIA") and Citi
                                                                      Fund Management Inc. ("CFM");
                                                                      President and Chief Executive
                                                                      Officer of certain mutual funds
                                                                      associated with Citigroup Inc.
                                                                      ("Citigroup"); Formerly
                                                                      Portfolio Manager of Smith
                                                                      Barney Allocation Series Inc.
                                                                      (from 1996-2001) and Smith
                                                                      Barney Growth and Income Fund
                                                                      (from 1996-2000)

OFFICERS:

Andrew B. Shoup***                     Senior Vice       Since        Director of CAM; Senior Vice       N/A             N/A
CAM                                    President and     2003         President and Chief
125 Broad Street, 10th Floor           Chief                          Administrative Officer of mutual
New York, NY 10004                     Administrative                 funds associated with Citigroup;
Age 47                                 Officer                        Head of International Funds
                                                                      Administration of CAM (from 2001
                                                                      to 2003); Director of Global
                                                                      Funds Administration of CAM
                                                                      (from 2000 to 2001); Head of
                                                                      U.S. Citibank Funds
                                                                      Administration of CAM (from 1998
                                                                      to 2000)

Richard L. Peteka                      Chief             Since        Director of CGM; Chief Financial   N/A             N/A
CAM                                    Financial         2002         Officer and Treasurer of certain
125 Broad Street, 11th Floor           Officer and                    mutual funds affiliated with
New York, NY 10004                     Treasurer                      Citigroup; Director and Head of
Age 42                                                                Internal Control for CAM U.S.
                                                                      Mutual Fund Administration (from
                                                                      1999-2002); Vice President, Head
                                                                      of Mutual Fund Administration
                                                                      and Treasurer at Oppenheimer
                                                                      Capital (from 1996-1999)

Kaprel Ozsolak                         Controller        Since        Vice President of CGM;             N/A             N/A
CAM                                                      2002         Controller of certain funds
125 Broad Street, 11th Floor                                          associated with Citigroup
New York, NY 10004
Age 38

Robert I. Frenkel                      Secretary***      Since        Managing Director and General      N/A             N/A
CAM                                    and Chief Legal   2003         Counsel of Global Mutual Funds
300 First Stamford Place               Officer                        for CAM and its predecessor
4th Floor                                                             (since 1994); Secretary of CFM;
Stamford, CT 06902                                                    Secretary and Chief Legal
Age 48                                                                Officer of mutual funds
                                                                      associated with Citigroup



- ----------
*    EACH DIRECTOR AND OFFICER SERVES UNTIL HIS OR HER SUCCESSOR HAS BEEN DULY
     ELECTED AND QUALIFIED.

**   MR. GERKEN IS AN "INTERESTED PERSON" OF THE COMPANY AS DEFINED IN THE
     INVESTMENT COMPANY ACT OF 1940, AS AMENDED, BECAUSE MR. GERKEN IS AN
     OFFICER OF SBFM AND CERTAIN OF ITS AFFILIATES.

***  AS OF NOVEMBER 25, 2003.



           20  SMITH BARNEY SECTOR SERIES INC. | 2003 Annual Report




- --------------------------------------------------------------------------------
SMITH BARNEY
FINANCIAL SERVICES FUND
- --------------------------------------------------------------------------------


    DIRECTORS                                  INVESTMENT MANAGER

    Herbert Barg                               Smith Barney Fund
    Dwight B. Crane                              Management LLC
    Burt N. Dorsett
    R. Jay Gerken, CFA
      CHAIRMAN                                 DISTRIBUTORS
    Elliot S. Jaffe
    Stephen E. Kaufman                         Citigroup Global Markets Inc.
    Joseph J. McCann                           PFS Distributors, Inc.
    Cornelius C. Rose, Jr.

                                               CUSTODIAN
    OFFICERS
                                               State Street Bank and
    R. Jay Gerken, CFA                           Trust Company
    President and
    Chief Executive Officer
                                               TRANSFER AGENT
    Andrew B. Shoup*
    Senior Vice President and                  Citicorp Trust Bank, fsb.
    Chief Administrative Officer               125 Broad Street, 11th Floor
                                               New York, New York 10004
    Richard L. Peteka
    Chief Financial Officer
    and Treasurer                              SUB-TRANSFER AGENTS

    Kaprel Ozsolak                             PFPC Inc.
    Controller                                 P.O. Box 9699
                                               Providence, Rhode Island
    Robert I. Frenkel                          02940-9699
    Secretary* and
    Chief Legal Officer                        Primerica Shareholder Services
                                               P.O. Box 9662
                                               Providence, Rhode Island
                                               02940-9662






    * AS OF NOVEMBER 25, 2003.




SMITH BARNEY SECTOR SERIES INC.
- --------------------------------------------------------------------------------

SMITH BARNEY FINANCIAL SERVICES FUND

The Fund is a separate investment fund of the Smith Barney Sector Series Inc.,
a Maryland  corporation.

This report is submitted for the general information of the shareholders of
Smith Barney Sector Series Inc. -- Smith Barney Financial Services Fund, but it
may also be used as sales literature when preceded or accompanied by the current
Prospectus, which gives details about charges, expenses, investment objectives
and operating policies of the Fund. If used as sales material after January 31,
2004, this report must be accompanied by performance information for the most
recently completed calendar quarter.


SMITH BARNEY FINANCIAL SERVICES FUND
Smith Barney Mutual Funds
125 Broad Street
10th Floor, MF-2
New York, New York 10004



For complete information on any Smith Barney Mutual Funds, including management
fees and expenses, call or write your financial professional for a free
prospectus. Read it carefully before you invest or send money.


www.smithbarneymutualfunds.com


(C)2003 Citigroup Global Markets Inc.

Member NASD, SIPC

FD02127 12/03                                                          03-5779






ITEM 2.  CODE OF ETHICS.

         The registrant has adopted a code of ethics that applies to the
         registrant's principal executive officer, principal financial officer,
         principal accounting officer or controller.


ITEM 3.  AUDIT COMMITTEE FINANCIAL EXPERT.

         The Board of Directors of the registrant has determined that Dwight
         Crane, the Chairman of the Board's Audit Committee, possesses the
         technical attributes identified in Instruction 2(b) of Item 3 to Form
         N-CSR to qualify as an "audit committee financial expert," and has
         designated Mr. Crane as the Audit Committee's financial expert. Mr.
         Crane is an "independent" Director pursuant to paragraph (a)(2) of Item
         3 to Form N-CSR.


ITEM 4.  PRINCIPAL ACCOUNTANT FEES AND SERVICES.

         Not applicable.


ITEM 5.  AUDIT COMMITTEE OF LISTED REGISTRANTS.

         Not applicable.


ITEM 6.  [RESERVED]


ITEM 7.  DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END
         MANAGEMENT INVESTMENT COMPANIES.

         Not applicable.


ITEM 8.  [RESERVED]


ITEM 9.  CONTROLS AND PROCEDURES.

         (a)      The registrant's principal executive officer and principal
                  financial officer 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")) are effective as of a date within 90 days of the
                  filing date of this report that includes the disclosure
                  required by this paragraph, based on their evaluation of the
                  disclosure controls and procedures required by Rule 30a-3(b)
                  under the 1940 Act and 15d-15(b) under the Securities Exchange
                  Act of 1934.

         (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) that occurred during the registrant's last
                  fiscal half-year (the registrant's second fiscal half-year in
                  the case of an annual report) that have materially affected,
                  or are likely to materially affect the registrant's internal
                  control over financial reporting.


ITEM 10. EXHIBITS.

         (a)      Code of Ethics attached hereto.

                  Exhibit 99.CODE ETH

         (b)      Attached hereto.

                  Exhibit 99.CERT         Certifications pursuant to section 302
                                          of the Sarbanes-Oxley Act of 2002

                  Exhibit 99.906CERT      Certifications pursuant to Section 906
                                          of the Sarbanes-Oxley Act of 2002




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, there unto duly authorized.

SMITH BARNEY SECTOR SERIES INC.


By:      /s/ R. Jay Gerken
         R. Jay Gerken
         Chief Executive Officer of
         SMITH BARNEY SECTOR SERIES INC.

Date: December 29, 2003

     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:      /s/ R. Jay Gerken
         (R. Jay Gerken)
         Chief Executive Officer of
         SMITH BARNEY SECTOR SERIES INC.

Date: December 29, 2003

By:      /s/ Richard L. Peteka
         (Richard L. Peteka)
         Chief Financial Officer of
         SMITH BARNEY SECTOR SERIES INC.

Date: December 29, 2003