Zenith Equity Portfolio

Average Annual Total Return as of December 31, 2009

1 Year

5 Years

10 Years

S&P 500 Index (reflects no deduction for mutual fund fees or expenses)

497K 1 d497k.htm ZENITH EQUITY PORTFOLIO Zenith Equity Portfolio

METROPOLITAN

SERIES FUND, INC.

SUMMARY PROSPECTUS May 1, 2010

Zenith Equity Portfolio

Class A Shares

Before you invest, you may want to review the Portfolio’s Prospectus, which contains more information about the Portfolio and its risks. You can find the Portfolio’s Prospectus and other information about the Portfolio (including the documents listed below) online at www.metlife.com/variablefunds. You can also get this information at no cost by calling 1-800-638-7732 or by sending an e-mail request to RCG@metlife.com. The Portfolio’s Prospectus and Statement of Additional Information, both dated May 1, 2010, and the financial statements of the Portfolio for the year ended December 31, 2009, including notes to the financial statements and financial highlights and the report of the Portfolio’s independent registered public accounting firm, which are included in the Annual Report of the Portfolio, are all incorporated by reference into this Summary Prospectus. The summary prospectuses, prospectuses and statements of additional information for the investment companies in which the Portfolio invests (the “Underlying Portfolios”) may be obtained in the same manner as you would obtain a copy of the Portfolio’s Prospectus. This Summary Prospectus is intended for individuals who have purchased certain variable life insurance policies and variable annuity contracts (collectively, “Contracts”) from Metropolitan Life Insurance Company and its affiliates and is not intended for other investors.

Investment Objective

Long-term capital appreciation.

Fees and Expenses of the Portfolio

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. These fees and expenses are based on the year ended December 31, 2009, and are expressed as a percentage of the Portfolio’s average daily net assets over that period. The table and the Example below do not reflect the fees, expenses or withdrawal charges imposed by the Contracts, but do reflect the fees and expenses of the Underlying Portfolios. If Contract expenses were reflected, the fees and expenses in the table and Example would be higher. See the Contract prospectus for a description of those fees, expenses and charges.

Shareholder Fees (fees paid directly from your investment)—None

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)


		Class A
Management Fee		None
Distribution and Service (12b-1) Fees		None
Other Expenses		0.02%
Acquired Fund Fees and Expenses (i.e., Underlying Portfolio Fees and Expenses)		0.71%

Total Annual Portfolio Operating Expenses		0.73%

As an investor in an Underlying Portfolio, the Portfolio bears its pro-rata portion of the operating expenses of that Underlying Portfolio, including such Underlying Portfolio’s management fee. The percentage shown above for Acquired Fund Fees and Expenses (i.e., Underlying Portfolio Fees and Expenses) shows the fees and expenses that the Portfolio incurred indirectly as a result of its investments in shares of the Underlying Portfolios during the last fiscal year.

Example

The following Example is intended to help you compare the cost of investing in the Portfolio, including the cost of investing in the Underlying Portfolios, with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year, that you reinvest all of your dividends and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:


		Class A
1 Year		$75
3 Years		$233
5 Years		$406
10 Years		$906

Portfolio Turnover

The Portfolio, which operates as a fund of funds, does not pay transaction costs when it buys and sells shares of Underlying Portfolios (or “turns over” its portfolio). An Underlying Portfolio pays transactions costs, such as commissions, when it turns over its portfolio, and a higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the performance of both the Underlying Portfolios and the Portfolio. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 5% of the average value of its portfolio. An Underlying Portfolio, however, may have portfolio turnover rates as high as 200% or more.

Principal Investment Strategies

The Portfolio seeks to achieve its investment objective by investing its assets equally among the Underlying Portfolios, which are the Pioneer Fund Portfolio of the Met Investors Series Trust (the

“Trust”) and the Jennison Growth Portfolio and FI Value Leaders Portfolio of the Metropolitan Series Fund, Inc. (the “Fund”), rather than in a portfolio of securities. The Portfolio maintains this equal division of assets among the Underlying Portfolios by rebalancing the Portfolio’s assets each fiscal quarter. The Portfolio will invest at least 80% of its assets in equity securities. Each Underlying Portfolio has a different subadviser that will use a separate set of investment strategies, exposing each Underlying Portfolio to its own investment risks.

The Portfolio pays its share of each Underlying Portfolio’s expenses, as well as the Portfolio’s own expenses. This may result in certain duplications of expenses.

Investment Objectives of the Underlying Portfolios

Pioneer Fund Portfolio: reasonable income and capital growth.

Jennison Growth Portfolio: long-term growth of capital.

FI Value Leaders Portfolio: long-term growth of capital.

For further information about the Underlying Portfolios, including those Portfolios’ principal investment strategies and risks, please see the summary prospectuses and prospectuses of the Underlying Portfolios, which may be obtained free of charge by calling 1-800-638-7732. The Portfolio is subject to all of the risks to which the Underlying Portfolios are subject.

Primary Risks

As with all mutual funds, there is no guarantee that the Portfolio will achieve its investment objective. You could lose money by investing in the Portfolio. An investment in the Portfolio through a Contract is not a deposit or obligation of, or guaranteed by, any bank, and is not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board, or any other agency of the U.S. Government.

There are direct and indirect risks of investing in the Portfolio. The value of your investment in the Portfolio may be affected by one or more of the following risks, which are described in more detail in “Primary Risks of Investing in the Portfolio” in the Prospectus, any of which could cause the Portfolio’s return or the price of its shares to decrease or could cause the Portfolio’s yield to fluctuate. Please note that there are many other circumstances that could adversely affect your investment and prevent the Portfolio from reaching its objective, which are not described here.

Performance Risk. Performance risk is a direct risk of investing in the Portfolio. The investment performance of a Portfolio that invests all or substantially all of its assets in Underlying Portfolios may be adversely affected if the Underlying Portfolios are unable to meet their investment objectives or the Portfolio allocates a significant portion of its assets to an Underlying Portfolio that performs poorly, including relative to other Underlying Portfolios.

Indirect risks of investing in the Portfolio (direct risks of investing in the Underlying Portfolios) include:

Market Risk. An Underlying Portfolio’s share price can fall because of, among other things, a decline in the market as a whole, deterioration in the prospects for a particular industry or company, or changes in general economic conditions, such as prevailing interest rates and investor sentiment. Significant disruptions to the financial markets could adversely affect the liquidity and volatility of securities held by an Underlying Portfolio.

Interest Rate Risk. The value of an Underlying Portfolio’s investments in fixed income securities may decline when prevailing interest rates rise or increase when interest rates go down. The longer a security’s maturity or duration, the greater its value will change in response to changes in interest rates. The interest earned on an Underlying Portfolio’s investments in fixed income securities may decline when prevailing interest rates decline.

Credit and Counterparty Risk. The value of an Underlying Portfolio’s investments may be adversely affected if a security’s credit rating is downgraded; an issuer of an investment held by an Underlying Portfolio fails to pay an obligation on a timely basis, otherwise defaults or is perceived by other investors to be less creditworthy; or a counterparty to a derivatives or other transaction with an Underlying Portfolio files for bankruptcy, becomes insolvent, or otherwise becomes unable or unwilling to honor its obligation to an Underlying Portfolio.

Foreign Investment Risk. Investments in foreign securities tend to be more volatile and less liquid than investments in U.S. securities because, among other things, they involve risks relating to political, social and economic developments abroad, as well as risks resulting from differences between the regulations and reporting standards and practices to which U.S. and foreign issuers are subject. To the extent foreign securities are denominated in foreign currencies, their values may be adversely affected by changes in currency exchange rates. All of the risks of investing in foreign securities are typically increased by investing in emerging market countries.

High Yield Debt Security Risk. High yield debt securities, or “junk” bonds, may be more susceptible to market risk and credit and counterparty risk than investment grade debt securities because issuers of high yield debt securities are less secure financially and their securities are more sensitive to downturns in the economy. In addition, the secondary market for high yield debt securities may not be as liquid as that for more highly rated debt securities.

Market Capitalization Risk. Investing primarily in issuers in one market capitalization category (large, medium or small) carries the risk that due to current market conditions that category may be out of favor with investors. Larger, more established companies may be unable to respond quickly to new competitive challenges or attain the high growth rate of successful smaller companies.

Zenith Equity Portfolio

Stocks of smaller companies may be more volatile than those of larger companies due to, among other things, narrower product lines, more limited financial resources and fewer experienced managers. In addition, there is typically less publicly available information about small capitalization companies, and their stocks may have a more limited trading market than stocks of larger companies.

Investment Style Risk. Different investment styles such as growth or value tend to shift in and out of favor, depending on market and economic conditions as well as investor sentiment. An Underlying Portfolio may outperform or underperform other funds that employ a different investment style.

Mortgage-Backed and Asset-Backed Securities Risk. The value of investments in mortgage-backed and asset-backed securities is subject to interest rate risk and credit risk. These securities are also subject to the risk that issuers will prepay the principal more quickly or more slowly than expected, which could cause an Underlying Portfolio to invest the proceeds in less attractive investments or increase the volatility of their prices. To the extent mortgage-backed and asset-backed securities held by an Underlying Portfolio are backed by lower rated securities, such as sub-prime obligations, or are subordinated to other interests in the same mortgage or asset pool, the likelihood of an Underlying Portfolio receiving payments of principal or interest may be substantially limited.

Derivatives Risk. An Underlying Portfolio may invest in derivatives to obtain investment exposure, enhance return or “hedge” or protect its assets from an unfavorable shift in the value or rate of a reference instrument. Derivatives can significantly increase the Portfolio’s exposure to market risk, credit and counterparty risk and other risks. Derivatives may be illiquid and difficult to value. Because of their complex nature, some derivatives may not perform as intended. As a result, the Portfolio may not realize the anticipated benefits from a derivative it holds or it may realize losses. Derivative transactions may create investment leverage, which may increase the Portfolio’s volatility and may require the Portfolio to liquidate portfolio securities when it may not be advantageous to do so.

Past Performance

The information below shows the volatility of the Portfolio’s returns from year to year and how the Portfolio’s average annual returns over time compare with those of a broad-based securities market index. Both the bar chart and table assume reinvestment of dividends and distributions. Note that the results in the bar chart and table do not include the effect of Contract charges. If these Contract charges had been included, performance would have been lower. As with all mutual funds, past returns are not a prediction of future returns. On May 1, 2002, the Portfolio changed its investment objective and policies to invest in the Underlying Portfolios rather than in a portfolio of securities. On that date, Capital Growth Management Limited Partnership (“CGM”) ceased to be subadviser but MetLife Advisers remained as investment adviser. The performance information set forth below includes results prior to these changes. CGM was the adviser to the Portfolio from the Portfolio’s inception to April 30, 2001. From May 1, 2001 to April 30, 2002, CGM was the subadviser to the Portfolio and MetLife Advisers was the adviser. On May 1, 2009, the Portfolio changed its investment strategy from investing in the Capital Guardian U.S. Equity Portfolio, Jennison Growth Portfolio and FI Value Leaders Portfolio of the Fund to investing in the Pioneer Fund Portfolio of the Trust and the Jennison Growth Portfolio and FI Value Leaders Portfolio of the Fund. The performance information set forth below reflects results prior to this change.

The bar chart below shows you the performance of the Portfolio’s Class A shares for the last ten full calendar years and indicates how it has varied from year to year. The Portfolio can also experience short-term performance swings as indicated in the high and low quarter information at the bottom of the chart. The table below compares the Portfolio’s average annual compounded total returns with relevant index returns. For more information about indexes, please see “Index Description” in the Prospectus. It is not possible to invest directly in an index.

Year-by-Year Total Return as of December 31 of Each Year

LOGO


Highest Quarter	4th – 2001	17.54%
Lowest Quarter	4th – 2008	-21.90%

Management

Adviser. MetLife Advisers, LLC (“MetLife Advisers”) is the Portfolio’s investment adviser.

Portfolio Managers. The Portfolio is managed by a committee led by Elizabeth M. Forget. Other members of the committee are Alan C. Leland, Jr., Darrel A. Olson, Thomas C. McDevitt and Jeffrey L. Bernier. Ms. Forget and Messrs. Leland, Olson and McDevitt have been members of the committee since 2005; Mr. Bernier, since 2008.

For more information about the adviser and the portfolio managers, please see “Additional Information about Management—The Adviser” in the Prospectus and “Advisory Arrangements” and “Portfolio Managers” in the Statement of Additional Information.

Zenith Equity Portfolio

Tax Information

For information regarding the tax consequences of Contract ownership, please see the prospectus for the relevant Contract.

Payments to Insurance Companies and Their Affiliates

The Portfolio is not sold directly to the general public but instead is offered as an underlying investment option for Contracts issued by insurance companies that are affiliated with the Portfolio and MetLife Advisers. As a result of these affiliations, the insurance companies may benefit more from offering the Portfolio as an investment option in the Contracts than offering other unaffiliated portfolios. The Portfolio and its related companies may also make payments to the sponsoring insurance companies (or their affiliates) for distribution and/or other services. The benefits to the insurance companies of offering the Portfolio over unaffiliated portfolios and these payments may be factors that the insurance companies consider in including the Portfolio as an underlying investment option in the Contracts and may create a conflict of interest. The prospectus for your Contract contains additional information about these payments.

Zenith Equity Portfolio