Stock index futures pointed to a mixed open for U.S. shares on Wednesday, following a surge in the previous session.

At 5:30 a.m. EST, futures for the Dow Jones were flat; those for the S&P 500 were up 0.l percent and those for the Nasdaq were down 0.2 percent.

Macro data due includes sales of existing homes in January. A Reuters poll suggests sales will have risen to an annual pace of 4.79 million units.

Retailer Limited Brands and flow control systems provider Flowserve are among those reporting fourth-quarter results.

First Solar shares slid after the closing bell on Tuesday after the designer and manufacturer of solar modules said the short-term outlook for the solar industry has never looked more difficult. For details see

Shares of Wynn Resorts tumbled more than 11 percent to $22.90 in extended trade on Tuesday after the company posted fourth-quarter adjusted earnings of 13 cents a share, well below Wall Street estimates of 41 cents a share.

Stocks rose more than 3 percent on Tuesday to snap back from 12-year closing lows, after Bernanke signaled that nationalization of big banks was not at hand.

(Reporting by Brian Gorman; editing by Simon Jessop)