T. Rowe Price Extended Equity Market Index Fund

T. Rowe Price

Extended Equity Market Index Fund

SUMMARY

Investment Objective

The fund seeks to track the performance of a benchmark index that measures the investment return of small- and mid-capitalization U.S. stocks.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees (USD $)		T. Rowe Price Extended Equity Market Index Fund
Maximum sales charge (load) imposed on purchases		none
Maximum deferred sales charge (load)		none
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less)		0.50%
Maximum account fee	[1]	20

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses		T. Rowe Price Extended Equity Market Index Fund
Management fees		0.40%
Distribution and service (12b-1) fees		none
Other expenses		none
Acquired fund fees and expenses		0.05%
Total annual fund operating expenses	[1]	0.45%

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:

Expense Example (USD $)	1 year	3 years	5 years	10 years
T. Rowe Price Extended Equity Market Index Fund	46	144	252	567

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 21.7% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund attempts to match the investment return of small- and mid-capitalization U.S. stocks by seeking to match the performance of its benchmark index, the Standard & Poor’s Completion Index (S&P Index). The S&P Index consists of primarily small- and mid-capitalization stocks and generally includes those U.S. stocks that are not included in the Standard & Poor’s 500 Stock Index.

The fund uses a sampling strategy, investing substantially all of its assets in a group of stocks representative of the S&P Index. The fund does not attempt to fully replicate the index by owning each of the stocks in the index. The S&P Index includes approximately 3,200 stocks.

In an attempt to track 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.

Under normal conditions, the fund will invest at least 80% of its net assets (including any borrowings for investment purposes) in stocks that are held in its benchmark index. T. Rowe Price compares the composition of the fund to that of the index. If a material misweighting develops, the portfolio managers seek to rebalance the portfolio in an effort to realign it with its index.

While most assets will be invested in common stocks, the fund may also purchase stock index futures contracts. Futures would typically be used to reduce cash balances in the fund and increase the level of fund assets exposed to common stocks represented in the fund’s benchmark 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 indicates that the returns of the fund and the index will 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 a 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 companies, its share price could be more volatile than a fund that invests only in large 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.

Futures risk To the extent the fund uses futures, it is exposed to potential volatility and losses greater than direct investments in the contract’s underlying assets.

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.

Extended Equity Market Index Fund
Calendar Year Returns

	Quarter   Ended	Total Return
Best Quarter	6/30/09	21.55%
Worst Quarter	12/31/08	-26.52%

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.

Average Annual Total Returns

Periods ended
December 31, 2013

Average Annual Total Returns		1 Year	5 Years	10 Years		Inception Date
T. Rowe Price Extended Equity Market Index Fund		38.37%	22.55%	10.30%
T. Rowe Price Extended Equity Market Index Fund Returns after taxes on distributions		37.09%	22.15%	9.83%
T. Rowe Price Extended Equity Market Index Fund Returns after taxes on distributions and sale of fund shares		22.25%	18.49%	8.41%
T. Rowe Price Extended Equity Market Index Fund S&P Completion Index (reflects no deduction for fees, expenses, or taxes)		38.24%	22.57%	9.35%	[1]	Dec. 31, 2004
T. Rowe Price Extended Equity Market Index Fund Combined Index Portfolio (reflects no deduction for fees, expenses, or taxes)	[2]	38.24%	22.57%	10.31%

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-225-5132.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[1] The figure shown in the fee table does not match the "Ratio of expenses to average net assets" shown in the Financial Highlights table, as that figure does not include acquired fund fees and expenses.

[1] Returns as of 12/31/04.

[2] Combined 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.