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The 3% Minimum Coupon Principal Protected Notes Based Upon the Price of Gold (the “Notes”) are commodity-linked investments offered by Citigroup Funding Inc. and have a maturity of approximately five years. The Notes are 100% principal protected if held to maturity, subject to the credit risk of Citigroup Inc., and will pay a coupon per Coupon Period at a variable rate which will depend upon the Closing Price of gold on every Business Day in each Coupon Period but will not be less than 3% per Coupon Period. The term of each Coupon Period will be approximately one year.

For each Coupon Period, if the Closing Price of gold on every Business Day during such Coupon Period does not exceed the related Starting Price by more than 35% and the percentage change in the Closing Price of gold from the first Business Day of the related Coupon Period through the last Business Day of the Coupon Period (the “Gold Percentage Change”) is greater than 3%, the Coupon Amount you receive on the related Coupon Payment Date for each $10 Note you hold will be an amount based on the Gold Percentage Change and will not be greater than $3.50 (35% of $10 principal amount per Note). If the Closing Price of gold on any Business Day during such Coupon Period exceeds the related Starting Price by more than 35% or if the Gold Percentage Change is less than or equal to 3%, on the related Coupon Payment Date you will receive $0.30 (3% of $10 principal amount per Note) for each Note you hold.

Some key characteristics of the Notes include:

(i) an amount equal to the product of (a) $10 and (b) the Gold Percentage Change, if (x) the Closing Price of gold on every Business Day during the related Coupon Period is less than or equal to 135% of the applicable Starting Price and (y) the Gold Percentage Change is greater than 3%; or

(ii) an amount equal to $0.30 (3% of $10 principal amount per Note), in all other cases.

The total return on the Notes may be lower than that of a conventional fixed-rate debt security of Citigroup Funding of comparable maturity and can be as little as 15% for the approximately five year term of the Notes (on a simple-interest basis) if, during each Coupon Period, the Closing Price of gold exceeds the related Starting Price by more than 35% on any Business Day or the Gold Percentage Change for such Coupon Period is less than or equal to 3%.

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The Notes are not deposits or savings accounts, are not insured by the Federal Deposit Insurance Corporation (“FDIC”) or by any other governmental agency or instrumentality, and are not guaranteed by the FDIC under the Temporary Liquidity Guarantee Program.

An investment in the Notes involves significant risks. You should refer to “Key Risk Factors” below and “Risk Factors Relating to the Notes” in the pricing supplement related to this offering for a description of the risks.

Types of Investors

These Notes may be an appropriate investment for the following types of investors:

Commissions and Fees

Citigroup Global Markets Inc., an affiliate of Citigroup Funding and the underwriter of the sale of the Notes, will receive an underwriting fee of $0.325 for each $10.000 Note sold in this offering. Certain dealers, including Citi International Financial Services, Citigroup Global Markets Singapore Pte. Ltd., and Citigroup Global Markets Asia Limited, broker-dealers affiliated with Citigroup Global Markets, will receive from Citigroup Global Markets $0.300 from this underwriting fee for each Note they sell. Citigroup Global Markets will pay the Financial Advisors employed by Citigroup Global Markets and Morgan Stanley Smith Barney LLC, an affiliate of Citigroup Global Markets, a fixed sales commission of $0.300 for each Note they sell. Additionally, it is possible that Citigroup Global Markets and its affiliates may profit from expected hedging activity related to this offering, even if the value of the Note declines. You should refer to “Key Risk Factors” below and “Risk Factors Relating to the Notes” and “Plan of Distribution” in the pricing supplement related to this offering for more information.

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The Coupon Amount payable on each Coupon Payment Date will be determined by reference to the price of a troy ounce of gold generally known as the London PM Fix. The London PM Fix of price of gold is set by the five members of the London Gold Market Fixing Ltd. during the afternoon session of the twice-daily price of gold fix which starts at 3:00 p.m. London, England time. During each session, orders are placed either with one of the five fixing members or with another bullion dealer who will then be in contact with a fixing member during the fixing. The fixing members net-off all orders when communicating their individual net interest at the fixing. The fix begins with the fixing chairman suggesting a “trying price,” reflecting the market price prevailing at

the opening of the fix. This is relayed by the fixing members to their dealing rooms, which have direct communication with all interested parties. Any market participant may enter the fixing process at any time, or adjust or withdraw its order. The price of gold is adjusted up or down until all the buy and sell orders are matched, at which time the price is declared fixed. All fixing orders are transacted on the basis of this fixed price, which is instantly relayed to the market through various media. As of July 27, 2009, the five members of the London Gold Market Fixing Ltd. were The Bank of Nova Scotia – ScotiaMocatta, HSBC, Deutsche Bank AG London, Société Générale Corporate & Investment Banking, and Barclays Capital.

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The following table sets forth the high and low Closing Prices of gold for each month in the period from January 2004 through July 2009. These historical data on the price of gold are not necessarily indicative of the future performance of the price of gold or what the market

value of the Notes may be. Any historical upward or downward trend in the price of gold during any period set forth below is not an indication that the price of gold is more or less likely to increase or decrease at any time during the term of the Notes.

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Additional information on the price of gold is included in the pricing supplement related to this offering under “Description of the London PM Fix of the Price of Gold.” All such disclosures in the pricing supplement and the information regarding the London PM Fix of Price of Gold provided in this offering summary are derived from publicly available sources without independent verification. Such information reflects the policies of, and is subject to change without notice by, the London Gold Market Fixing Ltd. None of Citigroup Funding, Citigroup Inc., or Citigroup Global Markets assumes any responsibility for the accuracy or completeness of such information.

Disclaimer

The Notes are not sponsored, endorsed, sold or promoted by the London Gold Market Fixing Ltd. or by any member thereof. The London Gold Market Fixing Ltd. makes no representation or warranty, express or implied,

to the purchasers of the Notes or any member of the public regarding the advisability of investing in securities generally or in the Notes particularly or the ability of the London price of gold fixings to track general market performance of price of gold. The London Gold Market Fixing Ltd. has no relationship to Citigroup Funding and London price of gold fixings are determined without regard to Citigroup Funding or the Notes. The London Gold Market Fixing Ltd. has no obligation to take the needs of Citigroup Funding or the owners of the Notes into consideration in determining London price of gold fixings. The London Gold Market Fixing Ltd. is not responsible for and has not participated in the determination of the timing of, prices at, or quantities of the Notes to be issued or in the determination or calculation of the equation by which the Notes are to be converted into cash. The London Gold Market Fixing Ltd. has no obligation or liability in connection with the administration, marketing or trading of the Notes.

The Coupon Amount payable for each Coupon Period, which can be as little as $0.30 (3% of $10 principal amount per Note) per Note, will depend on the Closing Prices of gold on every Business Day during such Coupon Period and will be based on the Gold Percentage Change.

Because the Closing Price of gold may be subject to significant variations during each Coupon Period, it is not possible to present a chart or table illustrating a complete range of possible Coupon Amounts. The examples of hypothetical Coupon Amounts set forth below are intended to illustrate the effect of different Ending Prices of gold on the return of the Notes for each Coupon Period, which depends on whether there has been a Closing Price of gold on any Business Day during such Coupon Period greater than 137% of the related Starting Price and on the Gold Percentage Change. All of the hypothetical examples assume an investment in the Notes of $10, that the applicable Starting Price is 950.00, that the threshold for determining whether holders will receive a return based on the Gold Percentage Change or the fixed return of 3% is 137% of the applicable Starting Price, that 137% of the applicable Starting Price is 1301.50, that the term of the Coupon

Period is one year and that an investment is made on the initial Issue Date and held to the Coupon Payment Date.

As demonstrated by the examples below, if the hypothetical Closing Price of gold on every Business Day during each Coupon Period is less than or equal to 1301.50, the return for such Coupon Period will be equal to the Gold Percentage Change, and so long as the hypothetical applicable Ending Price is greater than the hypothetical applicable Starting Price and the Gold Percentage Change is greater than 3%, the Coupon Amount will be greater than $0.30 (3% of $10 principal amount per Note) per Note. If, however, the hypothetical Closing Price of gold on any Business Day during any Coupon Period is greater than 1301.50, the Coupon Amount for such Coupon Period will be equal to $0.30 (3% of $10 principal amount per Note) per Note, regardless of whether the hypothetical applicable Ending Price is greater than or less than the hypothetical applicable Starting Price. The hypothetical return for each Coupon Period provided in the examples is only relevant to such Coupon Period. A hypothetical return for one Coupon Period is no indication of such return for a subsequent Coupon Period.

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The total return on the Notes will depend on the Coupon Amount for each of the five Coupon Periods during the term of the Notes. Each Coupon Amount payable for each Coupon Period, which can be as little as $0.30 (3% of $10 principal amount per Note) per Note, will depend on the Closing Price of gold on every Business Day during such Coupon Period and will be based on the Gold Percentage Change. Because the Closing Price of gold

may be subject to significant variations during each Coupon Period, it is not possible to present graphs illustrating a complete range of possible total returns on the Notes. The example of a hypothetical total return on the Notes set forth below is intended to illustrate the effect of different Coupon Amounts on the total return on the Notes, which each depends on whether there has been a Closing Price of gold on any Business Day during

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each Coupon Period greater than 137% of the applicable Starting Price and on the Gold Percentage Change. All of the hypothetical examples below assume an investment in the Notes of $10; that the threshold for determining whether holders will receive a return based on the Gold

Percentage Change during each Coupon Period or the fixed return is 137% of the applicable Starting Price during such Coupon Period; that the term of the Notes is five years and that an investment is made on the initial Issue Date and held to the Maturity Date.

Hypothetical Coupon Period 1: During the first Coupon Period, the Closing Price of gold on every Business Day during such Coupon Period is less than or equal to 137% of the applicable Starting Price, and the Gold Percentage Change is less than 3%.

Hypothetical Coupon Period 2: During the second Coupon Period, the Closing Price of gold on every Business Day during such Coupon Period is less than or equal to 137% of the applicable Starting Price, and the Gold Percentage Change is greater than 3%.

Hypothetical Coupon Period 3: During the third Coupon Period, the Closing Price of gold on any Business Day during such Coupon Period is greater than 137% of the applicable Starting Price, and the Gold Percentage Change is greater than 3%.

Hypothetical Coupon Period 4: During the fourth Coupon Period, the Closing Price of gold on any Business Day during such Coupon Period is greater than 137% of the applicable Starting Price, and the Gold Percentage Change is less than 3%.

Hypothetical Coupon Period 5: During the last Coupon Period, the Closing Price of gold on every Business Day during such Coupon Period is less than or equal to 137% of the applicable Starting Price, and the Gold Percentage Change is less than 3%.

The examples are for purposes of illustration only. The actual total return on the Notes, if any, will depend on the actual Coupon Amount payable on each Coupon Payment Date.

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The following summarizes certain federal income tax considerations for initial U.S. investors that hold the Notes as capital assets. Investors should refer to the pricing supplement related to this offering and the accompanying prospectus supplement for additional information relating to U.S. federal income tax and to their tax advisors to determine tax consequences particular to their situation.

In the case of a holder of the Notes that is not a U.S. person, all payments made with respect to the Notes, if

any, and any gain realized upon the sale or other disposition of the Notes should not be subject to U.S. income or withholding tax, provided that the holder complies with applicable certification requirements (including in general the furnishing of an IRS Form W-8BEN or substitute form), and such payments or gain are not effectively connected with a U.S. trade or business of such holder, and such gain is not realized by an individual that is present in the United States for 183 days or more in the taxable year of the sale or disposition.

Notes beneficially owned by a non-U.S. holder who at the time of death is neither a resident nor a citizen of the United States should not be subject to U.S. federal estate taxes.

You should refer to the pricing supplement related to this offering for additional information relating to U.S. federal income tax treatment and should consult your own tax advisors to determine tax consequences particular to your situation.

Employee benefit plans subject to ERISA, entities the assets of which are deemed to constitute the assets of such plans, governmental or other plans subject to laws substantially similar to ERISA and retirement accounts (including Keogh, SEP and SIMPLE plans, individual retirement accounts and individual retirement annuities) are permitted to purchase the Notes as long as either (A)(1) no Citigroup Global Markets affiliate or employee is a fiduciary to such plan or retirement account that has or exercises any discretionary authority or control with respect to the assets of such plan or retirement account used to purchase the Notes or renders investment advice with respect to those assets and (2) such plan or retirement account is paying no more than adequate consideration for the Notes or (B) its acquisition and holding of the Notes is not prohibited by any such provisions or laws or is exempt from any such prohibition.

However, individual retirement accounts, individual retirement annuities and Keogh plans, as well as employee benefit plans that permit participants to direct the investment of their accounts, will not be permitted to purchase or hold the Notes if the account, plan or annuity is for the benefit of an employee of Citigroup Global Markets or Morgan Stanley Smith Barney or a family member and the employee receives any compensation (such as, for example, an addition to bonus) based on the purchase of Notes by the account, plan or annuity.

You should refer to the section “ERISA Matters” in the pricing supplement related to this offering for more information.

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If the Ending Price of gold is not reported on Reuters Page “GOFO” or Bloomberg Screen “GOLDLNPM <INDEX>“ or any successor page thereto on any date of determination, the Calculation Agent may determine the Ending Price in accordance with the procedures set forth in the pricing supplement related to this offering. You should refer to the section “Description of the Notes – Coupon Amount” in the related pricing supplement for more information.

Citigroup Global Markets is an affiliate of Citigroup Funding. Accordingly, the offering will conform with the requirements set forth in Rule 2720 of the NASD Conduct Rules adopted by the Financial Industry Regulatory Authority.

Client accounts over which Citigroup Inc. or its subsidiaries have investment discretion are NOT permitted to purchase the Notes, either directly or indirectly.

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