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UBS ATS Begins Disclosing Monthly Volume And Performance Data

New York | | Media Releases Americas

--Averaging 90 million Shares a Day, UBS ATS Reaches New Milestone—

UBS ATS, the firm's registered Alternative Trading System for crossing orders in US stocks, today began disclosing monthly volume data and performance metrics.

Having garnered significant momentum since its launch in 2008, UBS ATS now averages 90 million shares executed per day, with peak days surpassing 100 million shares. On May 15th UBS ATS executed a 2011 record of 115 million shares. The ATS is part of the global Equities business of UBS (NYSE: UBS), providing electronic trading clients and subscribers the opportunity for non-displayed crossing and price improvement. Clients trading electronically with UBS via algorithms or DMA tools have automatic access to the ATS with no additional trading steps or fees.

UBS ATS enables client orders to interact anonymously with an ever-increasing variety of order flows, including retail and institutional order flow, Direct Market Access (DMA) orders and internal UBS desks, as well as flow from other broker/dealers including High Frequency Traders (HFT). UBS first created the ATS to complement its internal crossing network. It has since evolved into one of the leading broker-owned ATS, offering 100% non-displayed, low-latency interaction across a wide range of venues through state-of-the art trading technology.

“UBS ATS gives our clients improved crossing and price improvement opportunities," said Charlie Susi, Global Co-Head, Direct Execution, UBS. “Our goal is to empower clients and enable market professionals to better capitalize on opportunities. Posting our ATS data monthly will help them to better evaluate the options available to them.”

UBS ATS data will be published monthly onto a specific webpage of the UBS website, and provide monthly metrics on:

– Average Daily Volume Executed
– Average Daily Notional Executed
– Total Symbols Active
– Total Symbols Traded
– Peak Day
– Average Price Improvement

The ATS order book will continue to have no display and will not be published, continuing UBS's commitment to client confidentiality.
For the first monthly volume and performance metrics on the UBS website, please go to: (www.ubs.com/ats)
For more information on UBS ATS, please click here to view.


About UBS
UBS draws on its 150-year heritage to serve private, institutional and corporate clients worldwide, as well as retail clients in Switzerland. We combine our wealth management, investment banking and asset management businesses with our Swiss operations to deliver superior financial solutions.

UBS is present in all major financial centers worldwide. It has offices in over 50 countries, with about 37% of its employees working in the Americas, 37% in Switzerland, 16% in the rest of Europe and 10% in Asia Pacific. UBS employs about 65,000 people around the world. Its shares are listed on the SIX Swiss Exchange and the New York Stock Exchange (NYSE).





About ETRACS

For further information about ETRACS ETNs go to http://www.etracs.com.

Exchange Traded Access Securities, ETRACS, are exchange-traded notes, or ETNs, an innovative class of investment products offering access to markets and strategies that may not be readily available to investors, and offer unique diversification opportunities in a number of different sectors. ETNs offer:
• Access to asset classes with historically low correlations to more traditional asset classes
• Convenience of an exchange-traded security
• Transparent exposure to a published index.


ETRACS ETNs are senior unsecured notes issued by UBS AG, are traded on NYSE Arca, and can be bought and sold through a broker or financial advisor. An investment in ETRACS ETNs is subject to a number of risks, including the risk of loss of some or all of the investor's principal, and is subject to the creditworthiness of UBS. We urge you to read the more detailed explanation of risks described under “Risk Factors” in the prospectus supplement for the ETRACS ETN.

There are 22 ETRACS ETNs:




The contents of any website referred to in this communication are not part of, or incorporated by reference in, this communication. UBS has filed a registration statement (including a prospectus, as supplemented by a prospectus supplement for the offering of the ETRACS ETNs) with the Securities and Exchange Commission (the “SEC”) for the offering to which this communication relates. Before you invest, you should read these documents and any other documents that UBS has filed with the SEC for more complete information about UBS and the offering to which this communication relates. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, you can request the prospectus and the applicable prospectus supplement by calling toll-free (+1.877.387.2275).

© UBS 2011. The key symbol, UBS and ETRACS are among the registered and unregistered trademarks of UBS. “ISE Volatility Futures™”, “ISE™®”, and “International Securities Exchange®” are trademarks of International Securities Exchange, LLC (“ISE” and “Licensor”) and have been licensed for use for certain purposes by UBS Securities LLC and its affiliates. UBS AG's ETRACS Constant-Month Equity Volatility Futures Index ETNs based on the ISE Volatility Futures™ Index are not sponsored, endorsed, sold or promoted by ISE, and ISE makes no representation regarding the advisability of trading in such product(s). “UBS Bloomberg Constant Maturity Commodity Index” and “CMCI” are service marks of UBS and/or Bloomberg. “Dow Jones,” “DJ-UBS Commodity Index” and “DJ-UBSCI” are service marks of Dow Jones & Company Inc. and UBS AG, as the case may be. “Standard & Poor's®,” “S&P®,” “S&P 500®,” “Standard & Poor's 500™,” “S&P 500 Gold Hedged,” “S&P 500 VIX Futures Term-Structure Index ER™,”“S&P 500 VIX Short-Term Futures™ Index ER,” and “S&P 500 VIX Mid-Term Futures™ Index ER,” are trademarks of S&P and have been licensed for use by UBS. “VIX” is a registered trademark of the Chicago Board Options Exchange, Incorporated (“CBOE”) and has been licensed for use by S&P. The ETNs are not sponsored, endorsed, sold or promoted by S&P or the CBOE. S&P and CBOE make no representation, condition or warranty, express or implied, to the owners of the ETN or any member of the public regarding the advisability of investing in securities generally or in the ETN or in the ability of either Index to track market performance. Alerian MLP Infrastructure Index, Alerian Natural Gas MLP Index, Alerian MLP Infrastructure Total Return Index, AMZI, AMZIX and ANGI are trademarks of GKD Index Partners, LLC d/b/a Alerian and their use is granted under a license from GKD Index Partners. Wells Fargo Securities, Wells Fargo Securities, LLC, Wells Fargo, and Wells Fargo® Master Limited Partnership Index are trademarks of Wells Fargo & Company and have been licensed for use by UBS AG. ETRACS Wells Fargo MLP Index is not issued, guaranteed, sponsored, endorsed, sold or promoted by Wells Fargo & Company, Wells Fargo Securities, LLC or their subsidiaries and affiliates (collectively, “Wells Fargo”). Wells Fargo makes no representation or warranty, express or implied, to investors in the ETRACS ETNs or any member of the public regarding the advisability of investing in securities generally or in this ETRACS Wells Fargo MLP Index particularly or the ability of any data supplied by Wells Fargo or any Index to track financial instruments comprising the Index or any trading market. Wells Fargo & Company does not guarantee that the Index referenced by the ETRACS ETNs has been accurately calculated and shall not have any liability for any error in the calculation. Wells Fargo's only relationship to UBS AG is the licensing of certain intellectual property rights relating to the Index as well as trademarks and trade names of Wells Fargo and of the data supplied by Wells Fargo that is determined, composed, compiled and calculated by Wells Fargo or a third party index calculator, without regard to this ETRACS Wells Fargo MLP Index. Wells Fargo has no obligation to take into consideration the ETRACS Wells Fargo MLP Index or investors in the ETRACS ETNs when determining, composing, compiling or calculating the data. Wells Fargo has no obligation or liability in connection with the listing, registration, distribution, administration, marketing, trading or redemption or settlement by the issuer or otherwise of this ETRACS Wells Fargo MLP Index. Wells Fargo does not guarantee the accuracy and/or the completeness of the index or of any data supplied by it or any data included therein. Wells Fargo makes no warranty, express or implied, as to results to be obtained by UBS AG and the ETRACS Wells Fargo MLP Index, or any other person or entity from the use of index or of the data supplied by Wells Fargo or any data included therein. Wells Fargo makes no express or implied warranties, and expressly disclaims all warranties of merchantability or fitness for a particular purpose or use with respect to the index and the data supplied by Wells Fargo or any data included therein. Without limiting any of the foregoing, in no event shall Wells Fargo have any liability for any special, punitive, indirect, or consequential damages (including lost profits), even if notified of the possibility of such damages. “ISE Oil Futures Spread™”, “ISE Natural Gas Futures Spread™”, “ISE™®”, and “International Securities Exchange®” are trademarks of International Securities Exchange, LLC ("ISE" or "Licensor") and have been licensed for use for certain purposes by UBS Securities LLC and its affiliates. UBS AG's ETRACS Natural Gas Futures Contango ETN and ETRACS Oil Futures Contango ETN based on the ISE Natural Gas Futures Spread™ Index and ISE Oil Futures Spread™ Index are not sponsored, endorsed, sold or promoted by ISE, and ISE makes no representation regarding the advisability of trading in such product(s). Other marks may be trademarks of their respective owners. All rights reserved. UBS assumes sole responsibility for this marketing material, which has not been reviewed by Bloomberg.




Notes to Editors

UBS draws on its 150-year heritage to serve private, institutional and corporate clients worldwide, as well as retail clients in Switzerland. We combine our wealth management, investment banking and asset management businesses with our Swiss operations to deliver superior financial solutions.

UBS is present in all major financial centers worldwide. It has offices in over 50 countries, with about 37% of its employees working in the Americas, 37% in Switzerland, 16% in the rest of Europe and 10% in Asia Pacific. UBS employs about 65,000 people around the world. Its shares are listed on the SIX Swiss Exchange and the New York Stock Exchange (NYSE).

Media Enquiries

New York:

Christiaan Brakman

christiaan.brakman@ubs.com

+1-212-882-5964