Standard & Poor’s 500 Index futures expiring in December fell 0.1 percent to 1,253.60.

Clearwire Corp. (CLWR) lost 2.7 percent to $2.19. The money-losing wireless carrier will sell $300 million of its stock in a public offering. Additional stock may the dilute the value of existing shares.

Exact Sciences Corp. (EXAS US): The biotechnology company said it plans to sell stock in a public offering. It has sold shares in three additional equity offerings since going public in 2001, according to data compiled by Bloomberg.

Leap Wireless International Inc. (LEAP) : The prepaid wireless carrier said it will buy mobile spectrum in Chicago from Verizon Wireless for $204 million. Verizon, the largest U.S. wireless operator, will also buy excess spectrum across the country from Leap Wireless for $188 million.

To contact the reporter on this story: Nikolaj Gammeltoft in New York atngammeltoft@bloomberg.net.

To contact the editor responsible for this story: Nick Baker at nbaker7@bloomberg.net.

http://www.bloomberg.com/news/2011-12-05/clearwire-exact-sciences-leap-wireless-u-s-equity-preview.html

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