* Global markets fall on credit, economic worry
* European bank rescues add to nervousness
* Citigroup, Wells Fargo battle for Wachovia
* Oil falls to 8-month low of $89 on weak demand worry
* Lehman Brothers CEO Fuld to testify on Capitol Hill
By Ellis Mnyandu
NEW YORK, Oct 6 (Reuters) - U.S. stock index futures slid on Monday as concerns about the widening fallout from the credit crisis fueled a global equities sell-off, and bank rescues in Europe heightened fears about the stability of major financial institutions.
Stock markets fell in Asia overnight and were tumbling in Europe where major indexes were down about 5 percent despite a push by Germany, Austria and other governments to reassure depositors about their funds.
And with signs that the credit markets remain strained, investors scurried toward the relative safety of government debt, sending yields on two-year U.S. Treasuries below 1.5 percent.
"We are headed for a sharply lower open. The fear of contagion is spreading on a daily basis, and that's why we are lower," said Peter Cardillo, chief market economist at Avalon Partners in New York.
"We are not seeing any real shift in interbank cost of borrowing, which basically means that credit markets are still locked up."
S&P 500 futures <SPc1> dropped 30 points and were below 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 <DJc1> slid 264 points and Nasdaq 100 <NDc1> futures shed 33 points.
A slide in oil prices below $90 a barrel underscored fears about the toll of the credit crisis on the outlook for global economic growth, said Cardillo.
He added that investors doubted that there would be immediate benefits from the $700 billion U.S. financial sector rescue plan passed by Congress on Friday as questions about how it will be implemented remained.
U.S. crude for November delivery <CLc1> fell 4 percent to $89.67 a barrel.
In a bid to stave off further turmoil, France's BNP Paribas <BNPP.PA> agreed to buy assets of troubled banking and insurance company Fortis <FOR.BR><FOR.AS> in Belgium and Luxembourg for 14.5 billion euros ($19.71 billion). For details, see [
]Over a frantic weekend, German officials clinched a revised rescue deal for lender Hypo Real Estate <HRXG.DE> that will see commercial banks and insurers provide 15 billion euros in liquidity, on top of an initial pledge of 35 billion euros. [
]In the United States, the Federal Reserve was pushing Citigroup Inc <C.N> and Wells Fargo & Co <WFC.N> to compromise over their competing bids for hobbled U.S. bank Wachovia Corp <WB.N> that could result in them carving up its assets, people familiar with the matter said.
Citigroup shares were down 4 percent at $17.60 before the bell.
Wall Street ended its worst week in seven years with another tumble on Friday on fears that the $700 billion financial rescue package may not unblock credit markets and stave off a U.S. recession. (Editing by Kenneth Barry)