U.S. stock index futures fell on Thursday, a day after the Federal Reserve voiced growing optimism about the economy, boosting the U.S. dollar even as interest rates stayed at historic lows.

* Citigroup Inc shares slid 8.4 percent to $3.16 in premarket trading after the bank's stock offering attracted weak demand and priced much lower than expected, prompting the U.S. Treasury to delay a plan to sell $5 billion of its stock in the bank.

* Weekly initial jobless claims, leading indicators for November and the Philadelphia Fed's business index are among the economic indicators due on Thursday.

* The Fed voted to keep interest rates at historic lows on Wednesday, but the U.S. dollar strengthened as the Fed said economic activity has continued to pick up.

* Growing concerns about Greece's fiscal health weighed on the euro and further lifted the greenback. The dollar index <.DXY> jumped nearly 1 percent.

* S&P 500 futures fell 6.2 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 lost 40 points, and Nasdaq 100 futures shed 11 points.

* Bank of America Corp tapped insider Brian Moynihan as its new chief executive on Wednesday, ending months of speculation about who would succeed Kenneth Lewis.

* Bailed-out insurer American International Group Inc plans to file a prospectus for a multibillion-dollar IPO of its Asian life insurance unit before Christmas, the Financial Times reported on Thursday.

* China's Zhejiang Geely Holding Group, a preferred bidder for Ford Motor's Volvo car unit, said it had signed up Johnson Controls Inc as its global auto parts supplier.

* U.S. stocks finished mostly flat on Wednesday after the Fed reiterated it would keep interest rates low for the foreseeable future to ensure a recovery.

(Editing by Jeffrey Benkoe)