US STOCKS-Wall St rises on HP results, rebound in banks

* HP's strong results propel gains

* Bank shares rise even as Fannie, Freddie shares slump

* Material, energy stocks up, oil edges higher

* Dow, S&P up 0.6 percent; Nasdaq up 0.2 percent (Updates to close)

By Steven C. Johnson

NEW YORK, Aug 20 (Reuters) - U.S. stocks rose on Wednesday after Hewlett-Packard (HPQ.N) posted reassuring results and bank shares rebounded, even as investors dumped Fannie Mae and Freddie Mac on fears of an imminent government bailout of the housing finance companies.

HP shares rose more than 5 percent, their best daily gain in six months, after the computer maker said quarterly profit leaped by 14 percent, raising hopes that overseas demand would support technology spending even as the U.S. economy slows.

Expectations that an imminent government bailout of Fannie and Freddie would wipe out shareholders drove the stocks to almost two-decade lows. But because any bailout would be aimed at saving the housing and mortgage market, shares of big banks rose. Shares of top mortgage lender Wells Fargo & Co (WFC.N) rose 4.1 percent.

Energy shares also posted strong gains, supporting the S&P 500, with shares of oil producer and refiner Hess Corp (HES.N) rising 5.3 percent and ConocoPhillips (COP.N) up 2 percent.

Oil gained for a second straight day, settling up 45 cents at $114.98 as concerns swirled about Russia's possible reaction to a U.S.-Poland missile shield. Also, Goldman Sachs reiterated its year-end forecast of $149 a barrel for U.S. crude. For details, see [ID:nLK476241]

"Going into the day some reasonably good earnings gave us a positive bias, and also it seems to me that the commodity stocks, which have been pretty beaten up, are having a very strong rebound," said Eric Kuby, chief investment officer at North Star Investment Management in Chicago.

"But this may be just bargain hunting, as I haven't seen any economic numbers that would be driving this."

The Dow Jones industrial average .DJI was up 68.88 points, or 0.61 percent, at 11,417.43. The Standard & Poor's 500 Index .SPX was up 7.85 points, or 0.62 percent, at 1,274.54. The Nasdaq Composite Index .IXIC was up 4.72 points, or 0.20 percent, at 2,389.08.

The S&P Financial index .GSPF gained 1.67 percent.

On the downside, shares of Fannie Mae (FNM.N) and Freddie Mac (FRE.N) lost more than 22 percent each. Shares of Fannie Mae, the biggest U.S. provider of housing finance, plunged 26.8 percent to $4.40, while Freddie shares fell 22.1 percent to $3.25.

"Until (the Fannie and Freddie) issue gets resolved, you'll continue to have that uncertainty, and it will be hard for the market to make any progress in that atmosphere," said Alan Lancz, president of Alan B. Lancz & Associates Inc, an investment advisory firm in Toledo, Ohio.