U.S. stock index futures were down on Tuesday after China clamped down on lending requirements, weighing on overseas markets.

* Markets are looking to the release of data on the crucial housing market. The Case/Shiller home price index for November is expected to show a rise of 0.1 percent versus October, but a 5 percent decline from a year ago. Also, the Federal Reserve begins its two day rate-setting meeting on Tuesday.

* China's central bank told some banks to increase their reserve ratios by 0.5 percentage point, effective Tuesday, sources said.

* Early Tuesday, Dow component DuPont swung to a fourth-quarter profit, beating expectations, and raised its 2010 profit view.

* Travelers Cos Inc also reported its fourth-quarter results, while Johnson & Johnson and Verizon Communications Inc are also due to report. All three companies are Dow components.

* S&P 500 futures fell 6.3 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 slid 38 points, while Nasdaq 100 futures lost 3.5 points.

* Apple Inc shares rose 1.5 percent to $206.17 in premarket trading a day after it reported better-than-expected Mac sales, but said iPhone shipments came in below Wall Street's somewhat heightened expectations.

* Texas Instruments Inc forecast revenue above estimates late Monday, saying strong sales across all product segments and regions would continue.

* Overseas shares were broadly lower after data showed the British economy grew 0.1 percent in the fourth quarter, far below forecasts. The number raised concerns the global recovery is still struggling to take hold.

* On Monday, U.S. stocks snapped a three-day slide as signs that Fed Chairman Ben Bernanke would win a U.S. Senate vote for a second term helped ease investor concerns.

(Reporting by Ryan Vlastelica; editing by Jeffrey Benkoe)