By Ellis Mnyandu

Stocks headed for a rise at Friday's opening as a further rebound in shares of natural resources companies offset bleak corporate outlooks and fears of inflation.

U.S. front-month crude held above $50 a barrel a day after surging 7 percent in the wake of the Federal Reserve's plan to pump another $1 trillion into the recession-hit economy. Spot gold prices hit a three-week high earlier and copper prices have surged as the U.S. central bank's plan fanned concerns of U.S. dollar weakness and inflation.

Commodity stocks rising before the bell included miner Freeport McMoRan Copper & Gold Inc , up 1.6 percent to $40.70. Shares of steelmaker U.S. Steel climbed 2 percent to $21.35.

Everybody is going to be watching gold and other commodities, with oil back above $50 and gold starting to approach that $1,000/oz level again, said Paul Mendelsohn, chief investment strategist at Windham Financial Services in Charlotte, Vermont.

Yesterday's activity in commodity stocks and commodity markets was quite significant in my view in terms of how the market is perceiving what the Fed did (on Wednesday) and its potential impact down the road. The assessment is that this is potentially going to be bad for the dollar.

S&P 500 futures were up 3.10 points and above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures climbed 11 points, and Nasdaq 100 futures added 3 points.

Trading was likely to be volatile as Friday marks the quarterly expiration and settlement of four different March equity futures and options contracts -- a convergence known as quadruple witching.

The S&P 500 <.SPX>, up 14.7 percent this week so far, is on track for its best 2-week run-up since 1974 when it rose 15.95 percent.

However, in addition to the fears of inflation from the Fed's plan, there is concern that the ruckus over insurer American International Group's executive bonuses may be distracting Washington from focusing on stabilizing the economy and sapping investor confidence.

A separate measure by the Federal Reserve, a long-awaited program to resuscitate consumer and small business lending, got off to a stuttering start on Thursday as the AIG political fury persisted.

The developments put the focus on Federal Reserve Chairman Ben Bernanke, who is scheduled to speak on the financial crisis and community banking at a banking event in Phoenix, Arizona, at 12 p.m. EDT.

Companies with disappointing outlooks included Xerox Corp , the world's top supplier of digital printer and document management services, which warned quarterly earnings will fall far short of its earlier expectations as a slowdown in technology spending undercuts revenue.

Xerox shares dropped 8.8 percent to $4.87 before the bell.

U.S. stocks fell on Thursday on concerns that the Federal Reserve's latest efforts to stem the U.S. recession are too costly and untested, prompting investors to book profits on bank shares after the recent sharp rally.

(Reporting by Ellis Mnyandu, Editing by Chizu Nomiyama)