U.S. stock index futures fell on Wednesday with investors wary of the effect of a strong U.S. dollar on earnings and ahead of housing sector data.

* Chipotle (CMG.N) shares fell 5.3 percent to $656 in premarket trading after the burrito chain on Tuesday reported the slowest same-restaurant sales growth in five quarters.

* EMC Corp (EMC.N) dropped 2.2 percent to $25.75 as the data storage equipment maker cut its full-year forecast, citing the strong dollar.

* First-quarter earnings of S&P 500 companies are expected to dip 2.2 percent, while revenues are seen declining 3.1 percent, according to Thomson Reuters data which includes companies that already reported.

* The dollar .DXY gained about 23 percent against a basket of major currencies over the financial year ended March 31, hurting companies with large overseas operations.

* Yahoo (YHOO.O) shares were up 1.3 percent at $45.07 after the company said it had hired advisers to determine the "most promising opportunities" for its stake in Yahoo Japan (4689.T).

* Broadcom (BRCM.O) rose 6.4 percent to $46.80 after the wireless chip maker reported higher-than-expected quarterly results, helped by strong demand for Apple's (AAPL.O) iPhone 6.

* Companies reporting results on Wednesday include McDonald's (MCD.N), while AT&T (T.N), Facebook (FB.O) and EBay (EBAY.O) will report after the closing bell.

* Data expected to be released later on Wednesday include home prices for February at 9:00 a.m. EDT (1300 GMT) followed an hour later by U.S. home resale numbers for March.

Futures snapshot at 7:37 a.m. EDT (1137 GMT):

* S&P 500 e-minis ESc1 fell 4 points, or 0.19 percent, with 160,138 contracts changing hands.

* Nasdaq 100 e-minis NQc1 lost 5.5 points, or 0.12 percent, in volume of 32,590 contracts.

* Dow e-minis 1YMc1 were down 48 points, or 0.27 percent, with 31,706 contracts changing hands.