* Global markets fall on credit jitters
* Bernanke, Paulson, Cox set to testify
* General Motors expected to unveil restructuring plan
* June's PPI, retail sales data on tap (Updates with details, updates prices)
By Ellis Mnyandu
NEW YORK, July 15 (Reuters) - U.S. stock index futures fell sharply on Tuesday as concerns about the credit crisis' impact on banks and other financial services companies curbed investors' appetite for riskier assets and sparked a global stock market slide.
Stocks fell in Asia and Europe. The euro surged to a an all-time high against the dollar, while oil prices headed back toward record territory. Investors gravitated to the relative safety of government debt.
Despite the U.S. government's efforts to calm markets with a rescue plan for mortgage finance companies Fannie Mae <FNM.N> and Freddie Mac <FRE.N>, investors feared the credit turmoil may be escalating, raising risks for the U.S. economy and the global financial system.
Investors will focus on testimony of Federal Reserve Chairman Ben Bernanke before the Senate Banking Committee starting at 10 a.m. (1300 GMT).
His remarks will be scrutinized for what steps the Fed plans to take to ease the credit turmoil. The collapse of mortgage lender IndyMac Bancorp Inc <IMB.N> late Friday has added to concerns about the banking sector. [
]"We have a continuation of doom and gloom out there. All eyes will be on Bernanke," said Peter Cardillo, chief market economist at Avalon Partners in New York.
"Maybe he might be able to calm things down, but the market will also be looking at other things like the price of oil and the economic data."
S&P 500 futures <SPc1> dropped 15.9 points and were below fair value, a mathematical formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract.
Dow Jones industrial average futures <DJc1> tumbled 136 points, and Nasdaq 100 <NDc1> futures slid 22.50 points.
Bank shares appeared poised to lead losses, with shares of Lehman Brothers <LEH.N> down 6.4 percent at $11.61 before the bell after the New York Post reported that Chief Executive Richard Fuld is considering ways to take the investment bank private. For details, see [
]In addition to Bernanke, the senators will hear from Treasury Secretary Henry Paulson and Securities and Exchange Commission Chairman Christopher Cox.
General Motors <GM.N> is also among stocks to watch, with the auto maker due to announce a further restructuring plan before the U.S. market open.
June's Producer Price Index and retail sales data are due at 8:30 a.m. (1230 GMT), while May's business inventories will be released at 10 a.m. (1400 GMT)
The market was also taking note of the Wall Street Journal's editorial, saying Paulson could make greater progress toward a safer financial system by putting Fannie Mae <FNM.N> and Freddie Mac <FRE.N> into federal receivership. [
]U.S. stocks fell on Monday on worry about the banking sector. (Editing by Kenneth Barry)