NEW YORK - Stock index futures rose on Wednesday as investors looked to snap up beaten-down shares following the prior session's slide.

A speech due later in the day by U.S. President Barack Obama to announce a plan to stem home foreclosures would likely offer investors more direction, a day after Wall Street slid to three-month closing lows.

Advancers before the bell included Citigroup Inc , up 3 percent to $3.15, which was among Tuesday's worst laggards.

General Motors is also among stocks to watch after the beleaguered automaker and its rival Chrysler LLC requested nearly $22 billion in additional U.S. government loans late on Tuesday. GM shares edged up nearly 1 percent to $2.20 before the bell.

We are going to bounce this morning, said Arthur Hogan, chief market analyst at Jefferies & Co in Boston. Today is another day where you come and look at spots where you're oversold. It will be a reflex rally after a short-term oversold market.

S&P 500 futures rose 3.40 points, and were 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 25 points, and Nasdaq 100 futures gained 5.75 points.

A lot is riding on what Obama says about how his administration plans to stabilize housing, whose downturn has slammed household wealth and forced banks to take big write-downs due to soured mortgages and other securities.

The Obama administration has closely guarded details of the roughly $50 billion plan but sources familiar with it have said it would be bolder than prior efforts to stem foreclosures. Obama will outline the plan in a speech in Mesa, Arizona at 12:15 p.m..

In earnings news, Deere & Co , the world's largest maker of farm equipment, reported an unexpectedly sharp drop in quarterly profit before the bell and slashed its forecast for full-year earnings, blaming a deepening recession and volatile exchange rates. The stock slipped 1.2 percent to $33.10.

Tuesday's slide extended the benchmark S&P 500's <.SPX> drop since the start of 2009 to 12.6 percent. The index began the year up more than 20 percent from its November bear market low but, through Tuesday's close, has erased that advance.

(Editing by James Dalgleish)