Before you invest, you may want to review the fund`s prospectus, which contains more information about the fund and its risks. You can find the fund`s prospectus and other information about the fund online at troweprice.com/prospectusesandreports. You can also get this information at no cost by calling 1-800-638-5660 or by sending an e-mail request to info@troweprice.com. This Summary Prospectus incorporates by reference the fund`s prospectus, dated May 1, 2010, and Statement of Additional Information, dated May 1, 2010.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)
Maximum sales charge (load) imposed on purchases	NONE
Maximum deferred sales charge (load)	NONE
Redemption fee (on shares held for 90 days or less)	0.50%
Maximum account fee	$10a
Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Management fee	0.40%
Distribution and service (12b-1) fees	0.00%
Other expenses	0.00%
Acquired fund fees and expenses	0.01%
Total annual fund operating expenses	0.41%

Example This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund 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 and that the fund`s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 year	3 years	5 years	10 years
$42	$132	$230	$518

Portfolio Turnover The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund`s performance. During the most recent fiscal year, the fund`s portfolio turnover rate was 18.2% of the average value of its portfolio.

Principal Investment Strategies The fund seeks to match the performance of the U.S. stocks that are not included in the S&P 500 Index, which are primarily small- and mid-capitalization stocks. The fund uses the S&P Completion Index to represent this universe.

The fund uses a sampling strategy, investing substantially all of its assets in a group of stocks representative of the S&P Completion Index. The fund does not attempt to fully replicate the index by owning each of the stocks in the index. The index includes approximately 3,700 stocks.

In an attempt to replicate the S&P Index, we select stocks based on industry, size, and other characteristics. For example, if technology stocks made up 15% of the S&P Index, the fund would invest about 15% of its assets in technology stocks with similar characteristics. Several factors are considered in selecting representative stocks, including historical price movement, market capitalization, transaction costs, and others.

T. Rowe Price compares the composition of the fund to that of the index. If a material misweighting develops, the portfolio manager seeks to rebalance the portfolio in an effort to realign it with its index. In addition to stocks, the fund may purchase exchange-traded funds, stock index futures, or stock options in an effort to minimize any deviations in performance with its index.

While there is no guarantee, the correlation between the fund and its index is expected to be at least 0.95. A correlation of 1.00 would mean the returns of the fund and the index almost always move in the same direction (but not necessarily by the same amount). A correlation of 0.00 would mean movements in the fund are unrelated to movements in the index.

The fund may sell securities to better align its portfolio with the characteristics of its benchmark or to satisfy redemption requests. However, the fund is not required to sell specific securities that have been removed from its index.

Principal Risks As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund`s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a company or a particular industry.

Small- and mid-cap stock risk Because the fund invests primarily in small- and medium-sized foreign companies, it is likely to be more volatile than a fund that invests only in large foreign companies. Small- and medium-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. Smaller companies may have limited trading markets and tend to be more sensitive to changes in overall economic conditions.

Index investing risk Because the fund is passively managed and seeks to match the performance of its benchmark index, holdings are generally not reallocated based on changes in market conditions or outlook for a specific security, industry, or market sector. As a result, the fund`s performance may lag the performance of actively managed funds.

Tracking error The returns of the fund are expected to be slightly below the returns of its benchmark index (referred to as "tracking error") because the fund incurs fees and transaction expenses while the index has no fees or expenses. Increased tracking error could also result from changes in the composition of the index or the timing of purchases and redemptions of fund shares. The fund uses a sampling strategy and does not attempt to fully replicate its benchmark index, which increases the potential for the fund`s performance to deviate from that of its index.

Derivatives risk To the extent the fund uses futures and options, it is exposed to additional volatility and potential losses.

Performance The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index. The fund`s past performance (before and after taxes) is not necessarily an indication of future performance.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

In addition, the average annual total returns table shows hypothetical after-tax returns to suggest how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor`s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account (IRA).

Average Annual Total Returns

	Periods ended December 31, 2009
	1 year	5 years	10 years
Extended Equity Market Index Fund
Returns before taxes	36.69%	2.17%	1.65%
Returns after taxes on distributions	36.48	1.64	1.05
Returns after taxes on distributions and sale of fund shares	24.05	1.75	1.17
S&P Completion Index	37.67	2.14	2.14*
Combined Index Portfolioa	37.67	2.30	1.84

aCombined Index Portfolio is an unmanaged portfolio composed of 100% Dow Jones Wilshire 4500 Completion Index (1/30/98 - 3/31/07), then 100% S&P Completion Index (from 4/1/07 forward). Indices and percentages may vary over time.

Portfolio Manager E. Frederick Bair and Ken. D. Uematsu are Co-chairmen of the fund`s Investment Advisory Committee. Mr. Bair has been chairman since 2005 and he joined T. Rowe Price in 1998. Mr. Uematsu has been co-chairman since 2008 and he joined T. Rowe Price in 1997.

The fund`s investment minimums generally are as follows (if you hold shares through a financial intermediary, the financial intermediary may impose different investment minimums):

Type of Account	Minimum initial purchase	Minimum subsequent purchase
IRAs and retirement plan accounts, Uniform Gifts to Minors Act or Uniform Transfers to Minors Act (UGMA/UTMA) accounts, and Education Savings Accounts (ESAs)	$1,000	$50
All other accounts	2,500	100

You may purchase, redeem, or exchange shares of the fund on any day the New York Stock Exchange is open for business by accessing your account online at troweprice.com, by calling 1-800-225-5132, or by written request. If you hold shares through a financial intermediary, you must purchase, redeem, and exchange shares through your intermediary.

The fund declares dividends daily and pays them on the first business day of each month. Fund distributions may be taxed as ordinary income or capital gains, unless you invest through an IRA, 401(k) plan, or other tax-deferred account.

If you purchase the fund through a broker-dealer or other financial intermediary, the fund and its related companies may pay the intermediary for the performance of administrative services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the fund over another investment. Ask your salesperson or visit your financial intermediary`s Web site for more information on these payments.