Premarket Roundup: AIG, Seagate Technology

Among the premarket stories for Wednesday, Sept. 23, from AP Financial News:

NEW YORK (AP) — Any reduction in the government's stake in insurer American International Group could dilute common shareholders in the process, an analyst wrote in a research note Wednesday.

NEW YORK (AP) — Shares of Seagate Technology rose Wednesday after the company signaled improving demand for its hard-disk drives and hiked its quarterly sales forecast.

NEW YORK (AP) — An analyst Wednesday downgraded shares of uniform rental companies, saying they are expensive, their market is challenging and prices to rent uniforms are "horrendous."

NEW YORK (AP) — An analyst downgraded shares of Carnival Corp. on Wednesday, after the cruise operator posted a lower fiscal third-quarter profit, and executives said that business was unlikely to improve dramatically.

NEW YORK (AP) — Shares of Walter Energy Inc. have reached a fair value and already reflect bullish expectations for hard coking coal prices, said an analyst on Wednesday as he downgraded the coal producer's stock.

NEW YORK (AP) — Analysts remain upbeat on Brocade Communications Systems Inc. despite a likely shortfall in earnings over the next year.