US equity futures were lower pre-bell Wednesday as traders digested earnings from Alphabet (GOOG, GOOGL) and Advanced Micro Devices (AMD).

The Dow Jones Industrial Average futures slipped 0.1%, S&P 500 futures fell 0.4%, and Nasdaq futures were down 0.8%.

Alphabet shares were down 6.8% pre-bell after the company reported late Tuesday Q4 revenue that trailed analysts estimates. Meanwhile, AMD stock was 9% lower after the chipmaker overnight reported weaker-than-expected data center sales for Q4 and warned of a sequential decline in revenue for Q1.

Oil prices fell, with front-month global benchmark North Sea Brent crude down 1.2% at $75.31 per barrel and US West Texas Intermediate crude down 1.2% at $71.88 per barrel.

The ADP Institute's Employment Report, scheduled for release at 8:15 am ET, is expected to show an increase in private payrolls to 148,000 in January from 122,000 a month earlier, according to estimates compiled by Bloomberg.

US trade deficit, due at 8:30 am ET, is expected to widen to $96.50 billion in December from $78.20 billion previously.

The Institute for Supply Management's Services index, scheduled for 10 am ET, is seen coming in at 54.2 for January versus 54.1 previously.