U.S. stock index futures were flat on Tuesday as investors looked ahead to a round of corporate results that could show the impact of overseas crises
on U.S. profits.
* Markets have been driven by uncertainty over Japan's nuclear power crisis and the civil unrest in the Middle East and North Africa. Wall Street ended slightly lower on Monday, recording the year's lowest volume, as investors worried the developments would be a headwind for stocks in the quarterly earnings season.
* Late Monday, Halliburton Co
* Companies expected to report earnings include Apollo Group
* Dow component Home Depot Inc
* Economic indicators include January Case-Shiller data, due at 9 a.m. and March consumer confidence, which is seen falling from the prior month.
* S&P 500 futures rose 1.3 points but 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 added 23 points and Nasdaq 100 futures rose 5.25 points.
* Wal-Mart Stores
* Goldman Sachs downgraded Dow component Travelers Cos Inc
* On Monday, U.S. stocks fell, with consumer shares hurt after hotel operator Marriott International
(Editing by Kenneth Barry)