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Listing and first trading day of Weatherford on 17 November 2010

(PresseBox) (Zürich, ) On 17 November 2010, the shares of Weatherford International Ltd. traded for the first time on SIX Swiss Exchange. Acceptance into the SPI will commence on 17 November 2010 after the close of trading and be progressively phased in over a period of five trading days. During that time frame, the company's free float will be increased by 20% each trading day. For the time being, the stock will not be added to any sub-indices of the SPI Family (e.g. SPI Extra, SPIexSLI).

The Management Committee of SIX Swiss Exchange is weighing the possibility of including Weatherford International in the SMI and SLI on an extraordinary basis. For that to occur, the stock - based on its order book turnover and average market capitalization during the months of December, January and February - must rank at least 15th for inclusion in the SMI and 20th for inclusion in the SLI. Determination of the ranking will be made in accordance with the current rules governing the SMI index family.

Upon fulfillment of the aforementioned criteria, Weatherford will be added to the SMI and/or SLI after the close of trading on the Eurex monthly expiration date of 18 March 2011 for effect as of 21 March 2011.

About SIX Group AG

SIX Swiss Exchange is one of the world's leading and most technologically advanced securities exchanges. It provides customers with first-rate securities exchange services and brings together participants, issuers and investors in an efficient and transparent marketplace. In addition to the broad palette of products it offers, the SIX Swiss Exchange's integrated, fully automatic trading, clearing and settlement system is indeed convincing. www.six-swiss-exchange.com

SIX Swiss Exchange is a subsidiary of SIX Group. On a worldwide scale, SIX Group offers first-rate services in the areas of securities trading, clearing and settlement, as well as financial market information and payment transactions. www.six-group.com

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