By Ryan Vlastelica
NEW YORK (Reuters) - U.S. stock index futures were slightly higher on Wednesday, implying a modest rebound from a sharp decline in the previous session, though questions remains about when the Federal Reserve would adjust its rate policies.
* Wall Street fell sharply on Tuesday, with the S&P 500 suffering its biggest one-day decline in two months, a drop that surpassed a selloff of similar magnitude on Friday. The benchmark index is down about 2.7 percent over the past three sessions, while the CBOE Volatility index <.VIX>, a measure of investor anxiety, is up almost 19 percent over that period.
* The weakness has come on increasing view the Fed may raise interest rates as soon as June. Those worries pushed the U.S. dollar to a nearly 12-year peak against the euro
* The U.S. Dollar index <.DXY> stayed strong on Wednesday, up 0.9 percent. The index has risen in five of the past six sessions, up about 4.3 percent over that period. The euro
* Despite the recent weakness, which took the Dow and S&P into negative territory for the year on Tuesday, the S&P is just 3.5 percent from a record close hit earlier this month. It is also about four points away from its 100-day moving average of 2,040.27. If the S&P breaks below that level, that could be a weak medium-term momentum.
* Energy shares will be in focus following a drop of more than 3 percent in crude oil prices on Tuesday. U.S. crude futures
* In company news, Zogenix Inc
* Wendys Co
Futures snapshot at 6:57:
* S&P 500 e-minis
* Nasdaq 100 e-minis
* Dow e-minis <1YMc1> were up 62 points, or 0.35 percent, with 20,256 contracts changing hands.
(Editing by W Smon)