April 8, 20101 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). 2 Source: Bloomberg, based on average daily dollar volume of ETFs for the 12 months ended 3/31/2010. All investing involves risk, including the possible loss of principal. ProShares 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. Short ProShares should lose value when their market indexes rise. There is no guarantee that any ProShares ETF will achieve its investment objective. 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 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. "NASDAQ Biotechnology Index ®" is a trademark of The NASDAQ OMX Group, Inc., and has been licensed for use by ProShares. ProShares have not been passed on by this entity or its subsidiaries or affiliates as to their legality or suitability. ProShares are not sponsored, endorsed, sold or promoted by this entity or its subsidiaries or affiliates, and they make no representation regarding the advisability of investing in these products. THIS ENTITY AND ITS SUBSIDIARIES AND AFFILIATES MAKE NO WARRANTIES AND BEAR NO LIABILITY WITH RESPECT TO PROSHARES.