Premarket roundup: Sprint Nextel, Mosaic, Potash

Among the premarket stories for Monday, Sept. 14, from AP Financial News:

NEW YORK (AP) — Shares of Sprint Nextel Corp. surged in premarket trading Monday after the U.K.'s Sunday Daily Telegraph reported Deutsche Telekom AG is considering a bid for the U.S. phone carrier.

NEW YORK (AP) — U.S. farmers are delaying applying fertilizer to their fields during the fall harvesting season, and China appears to be pressing for lower prices in a major contract, a Citigroup analyst said as he downgraded fertilizer suppliers Mosaic Co. and Potash Corp. of Saskatchewan Inc.

NEW YORK (AP) — William Blair&Co. upgraded shares of DreamWorks Animation SKG Inc. on Monday, offering an upbeat take on the studio's slate of films and the chances for a takeover bid.

NEW YORK (AP) — Shares of Discover Financial Services have room to rise, said Fox-Pitt Kelton on Monday, upgrading the credit-card issuer to its highest rating.

NEW YORK (AP) — An analyst downgraded oil and gas exploration and production company Rosetta Resources Inc. Monday, saying the stock has reached a fair value after tripling since March.