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Semi-Annual Changes To The NASDAQ OMX Clean Edge Global Wind Energy Index

Date 20/09/2010

The NASDAQ OMX Group, Inc. (Nasdaq:NDAQ) and Clean Edge, Inc. announced today the results of the semi-annual evaluation of the NASDAQ OMX(R) Clean Edge(R) Global Wind Energy Index (Nasdaq:QWND), which will become effective with the market open today.

The following three securities will be added to the Index: Innergex Renewable Energy Inc. (INE CN), RWE AG (RWE GY), and Theolia SA (TEO FP).

The Index is designed to act as a transparent and liquid benchmark for the global wind energy sector. The Index includes companies that are primarily manufacturers, developers, distributors, installers, and users of energy derived from wind sources. The securities must also meet other eligibility criteria which include minimum requirements for market capitalization and average daily dollar trading volume. The NASDAQ OMX(R) Clean Edge(R) Global Wind Energy Index is evaluated semi-annually in March and September. For more information about the NASDAQ OMX(R) Clean Edge(R) Global Wind Energy Index, including detailed eligibility criteria, visit https://indexes.nasdaqomx.com/.

The NASDAQ OMX Clean Edge Global Wind Energy Index is the basis for the PowerShares Global Wind Energy Portfolio (Nasdaq:PWND), which seeks investment results that correspond generally to the price and yield of the NASDAQ OMX Clean Edge Global Wind Energy Index before fees and expenses.

As a result of the evaluation, the following six securities will be removed from the Index: Broadwind Energy Inc. (BWEN UQ), Centrica PLC (CNA LN), Clipper Windpower PLC (CWP LN), Greentech Energy Systems (GES DC), PNE Wind AG (PNE3 GY), and Terna Energy SA (TENERGY GA).