ProShares Launches First Single Inverse ETFs on China, Real Estate and Basic Materials Indexes

PRESS RELEASE

Expands Nation's Only Lineup of Single Inverse Equity and Fixed-Income ETFs To 14

Bethesda, MD, March 18, 2010 — ProFunds Group, the world's largest manager of leveraged and inverse funds,¹ announced today that it is launching the first ETFs offering single inverse exposure to equity indexes on China, the U.S. Real Estate and the U.S. Basic Materials sectors. Single inverse ETFs seek to provide
-100% of the return of an index or benchmark, before fees and expenses, for a single day.

The new ProShares ETFs are: Short FTSE/Xinhua China 25 (YXI), Short Real Estate (REK) and Short Basic Materials (SBM). The ETFs will list today on NYSE Arca.

With today's launches, ProShares expands the nation's only lineup of single inverse equity and fixed-income ETFs to 14. These ETFs may be used by knowledgeable investors for short-term periods to manage risk or seek profit when markets decline.

"Our existing double inverse ETFs based on these indexes are popular, but some investors prefer the lower volatility of single inverse exposure," said Michael L. Sapir, Chairman and CEO of ProShare Advisors LLC, ProShares' investment advisor. "ProShares is committed to offering the broadest array of inverse ETFs to help knowledgeable investors protect their portfolios or potentially benefit from market dips."

ProShares	Ticker Symbol	Index	Objective*	Exchange
New Single Inverse ProShares
Short FTSE/Xinhua China 25	YXI	FTSE/Xinhua China 25 Index	-100% Daily	NYSE Arca
Short Real Estate	REK	Dow Jones U.S. Real Estate^SM Index	-100% Daily	NYSE Arca
Short Basic Materials	SBM	Dow Jones U.S. Basic Materials^SM Index	-100% Daily	NYSE Arca
Existing Single Inverse ProShares
Short Dow30	DOG	Dow Jones Industrial Average^SM	-100% Daily	NYSE Arca
Short S&P500	SH	S&P 500^® Index	-100% Daily	NYSE Arca
Short MidCap400	MYY	S&P MidCap 400^TM Index	-100% Daily	NYSE Arca
Short SmallCap600	SBB	S&P SmallCap 600^® Index	-100% Daily	NYSE Arca
Short Russell2000	RWM	Russell 2000^® Index	-100% Daily	NYSE Arca
Short QQQ	PSQ	NASDAQ-100^® Index	-100% Daily	NYSE Arca
Short Financials	SEF	Dow Jones U.S. Financials^SM Index	-100% Daily	NYSE Arca
Short Oil & Gas	DDG	Dow Jones U.S. Oil & Gas^® Index	-100% Daily	NYSE Arca
Short MSCI EAFE	EFZ	MSCI EAFE Index	-100% Daily	NYSE Arca
Short MSCI Emerging Markets	EUM	MSCI Emerging Markets Index	-100% Daily	NYSE Arca
Short 20+ Year Treasury	TBF	Barclays Capital 20+ Year U.S. Treasury Index	-100% Daily	NYSE Arca

*Before fees and expenses

About ProFunds Group

ProShares is part of ProFunds Group, the largest manager of leveraged and inverse funds and ETFs. ProShares introduced the first inverse and leveraged ETFs in the U.S. in 2006. Since 1997, ProFunds mutual funds have provided investors with access to sophisticated investment strategies. In addition, ProFunds Group subadvises the Canada-based Horizons BetaPro ETFs.

Media contact:

Tucker Hewes, Hewes Communications, Inc., (212) 207-9451, tucker@hewescomm.com

Most ProShares ETFs and many ProFunds employ leveraged investment techniques that magnify gains and losses and result in greater volatility in value. Each Short or Ultra ProShares ETF and leveraged or inverse ProFund seeks a return that is a multiple or inverse multiple (e.g., -200%) of the return of an index or other benchmark (target) for a single day (before fees and expenses). Due to the compounding of daily returns, ProShares’ and leveraged and inverse ProFunds’ returns over periods other than one day will likely differ in amount and possibly direction from the target return for the same period. Investors should monitor holdings consistent with their strategies, as frequently as daily. For more on correlation, leverage and other risks, please read the ProShares or ProFunds prospectus.

# # #

Mar 18, 2010

¹ Source: Lipper, based on a worldwide analysis of all of the known providers of funds in these categories. The analysis covered ETFs, ETNs and mutual funds by the number of funds and assets (as of 6/30/2009).

All investing involves risk, including the possible loss of principal. Short ProShares should lose value when their market indexes rise, and they entail certain risks, including the use of aggressive investment techniques (futures contracts, options, forward contracts, swap agreements and similar instruments), imperfect benchmark correlation, leverage and market price variance risks, all of which can increase volatility and decrease performance. ProShares are non-diversified and narrowly focused investments typically exhibit higher volatility. There is no guarantee that any ProShares ETF will achieve its investment objective.

The NAV value of ProShares Short FTSE/Xinhua China 25 is computed as of the close of the U.S. securities markets based upon the value of one or more U.S. exchange traded securities or instruments that reflect the values of the securities underlying the Index.

Carefully consider the investment objectives, risks, charges and expenses of ProShares and ProFunds before investing. This and other information can be found in their summary and full prospectuses. Read them carefully before investing. For ProShares ETF prospectuses visit proshares.com. For ProFunds mutual fund prospectuses visit profunds.com.

ProFunds Distributors, Inc. is distributor for ProFunds mutual funds. ProShares ETFs are distributed by SEI Investments Distribution Co., which is not affiliated with ProFunds Group or its affiliates.

"Dow Jones," "DJ," "Dow Jones U.S. Real Estate^SM," "Dow Jones U.S. Basic Materials^SM," "Dow Jones Industrial Average^SM," "Dow Jones U.S. Financials^SM" and "Dow Jones U.S. Oil & Gas^SM" are service marks of Dow Jones & Company, Inc. MSCI and EAFE are service marks of MSCI. "NASDAQ-100^®" is a trademark of the NASDAQ OMX Group, Inc. "S&P 500^®" Index, S&P MidCap 400^TM Index and S&P SmallCap 600^TM Index are trademarks of The McGraw-Hill Companies, Inc. The Russell 2000^® Index is a trademark of Russell Investments. Barclays Capital and Barclays Capital Inc. are trademarks of Barclays Capital Inc. "FTSE/Xinhua China 25" is a trademark of FTSE/Xinhua Index Limited ("FXI"). All have been licensed for use by ProShares. "FTSE^®" is a trademark of the London Stock Exchange PLC and The Financial Times Limited and is used by FXI under license. "Xinhua^®" is a trademark of Xinhua Finance Limited and is used by FXI under license. ProShares are not sponsored, endorsed or promoted by these entities or their subsidiaries or affiliates, and they make no representation regarding the advisability of investing in ProShares. THESE ENTITIES AND THEIR AFFILIATES MAKE NO WARRANTIES AND BEAR NO LIABILITY WITH RESPECT TO PROSHARES.

ProFunds Group includes ProFunds mutual funds and ProShares ETFs. ProFunds Distributors, Inc., is distributor for ProFunds mutual funds. ProShares ETFs are distributed by SEI Investments Distribution Co., which is not affiliated with ProFunds Group or its affiliates.

ProShares are distributed by SEI Investments Distribution Co., which is not affiliated with the funds' advisor or sponsor. Your use of this site signifies that you accept our Terms and Conditions of Use.

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ProShares Launches First Single Inverse ETFs on China, Real Estate and Basic Materials Indexes

Expands Nation's Only Lineup of Single Inverse Equity and Fixed-Income ETFs To 14

About ProFunds Group

Media contact:

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