U.S. stock index futures were slightly lower Wednesday morning.

At around 04:45 a.m. ET, Dow futures slipped 23 points, indicating a negative open of more than 3 points. Futures on the S&P and Nasdaq were both marginally lower.

The moves in pre-market trade come amid worries about the global tech sector.

Shortly after the closing bell on Tuesday, Texas Instruments -- which is often seen as a proxy for the microchip industry -- posted fourth-quarter guidance well below market estimates.

The revenue warning exacerbated concerns that the global chipmaker industry was being squeezed by a downturn in demand and the long-running U.S.-China trade war.

Source: CNBC