US stock futures point to lower open on Wall Street

* By 0850 GMT, the S&P 500 futures SPc1 were down 0.5 percent, Dow Jones industrial average futures DJc1 down 0.5 percent and the Nasdaq NDc1 futures down 0.4 percent.

* A Goldman Sachs analyst said Citigroup Inc (C.N) may incur second-quarter writedowns of $9 billion and raise additional capital. Goldman's William Tanona said he also assumes Merrill Lynch & Co Inc MER.N will incur $4.2 billion of writedowns in the second quarter. He added Citigroup to the Americas "conviction sell" list, and cut its rating on the U.S. brokerage sector to "neutral" from "attractive".

* Oracle Corp (ORCL.O) reported a 27 percent rise in quarterly profit as sales of new software beat expectations, but the company gave a cautious outlook citing economic uncertainties, and its shares fell 3 percent.

* Nike Inc (NKE.N) stressed that it was still a growth company even as U.S. weakness spooked investors, sending shares down 5 percent on a day when the world's largest athletic shoe and apparel maker posted strong international results.

* Research In Motion (RIMM.O) on Wednesday posted a profit outlook that fell short of analyst expectations, sending its shares 8 percent lower, even as the maker of the BlackBerry smartphone posted quarterly earnings that more than doubled.

* Anheuser-Busch Cos Inc BUD.N plans to reject InBev NV's INTB.BR unsolicited $46.3 billion takeover offer, saying it undervalues the company, a source familiar with the situation told Reuters. * Economic indicators on Thursday include weekly jobless claims, a final reading on first-quarter GDP and May existing home sales.

* Thursday's scheduled earnings reports include updates from Accenture (ACN.N), Discover Financial (DFS.N) and Lennar Corp (LEN.N), Micron Technology (MU.N).

(Reporting by Blaise Robinson; Editing by Erica Billingham)