* Tyson Foods posts better-than-expected profit
* Hewlett-Packard, Analog Devices results due later
* Futures off: Dow 26 pts, S&P 4.4 pts, Nasdaq 1.5 pts (Updates Tyson results, adds quote)
By Chuck Mikolajczak
NEW YORK, Nov 22 (Reuters) - U.S. stock index futures pointed to a lower open on Monday as enthusiasm over a resolution to help bail out Ireland dissipated and worries over contagion to other euro zone countries remained.
The European Union and International Monetary Fund tentatively agreed to a bailout package with Ireland, with loans up to 90 billion euros to resolve its banking and budget crisis.
Concerns that Ireland's debt crisis might spread to other euro zone countries has hung over U.S. stocks in recent weeks, and European shares fell 0.6 percent on Monday.
U.S.-listed shares of Bank of Ireland tumbled 18 percent to $2.19, while Allied Irish Banks Plc dropped 9.8 percent to $1.11 in premarket trade.
"The thing that killed Ireland was the jump in the yields made it impossible to finance their deficit. So the market is what forced them under," said Marc Pado, U.S. market strategist at Cantor Fitzgerald & Co in San Francisco.
"The natural fear (is) you look at the yields that they had to pay for their debt to GDP ratios, and you come to the conclusion that if things don't change here dramatically we could be in that same ratio category."
The new Basel III banking rules will leave the biggest U.S. banks short of between $100 billion and $150 billion in equity capital, with 90 per cent of the shortfall concentrated in the top six banks, the Financial Times reported, citing Barclays Capital research.
S&P 500 futures slipped 4.4 points and were slightly 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 dropped 26 points, and Nasdaq 100 futures shed 1.5 points.
Trading volume is expected to be tepid this week in light of the U.S. Thanksgiving Day holiday on Thursday.
No. 1 U.S. meat producer Tyson Foods Inc posted a higher-than-expected quarterly profit, helped by a big jump in gross margins, and the company said it was off to a strong start in its current quarter. Its shares gained 2.9 percent to $16.10 premarket.
Quarterly results are also due from Hewlett-Packard Co and Analog Devices Inc.