Tech stocks looked poised to rebound Wednesday ahead of the Federal Reserve's first interest-rate decision under new chairman Kevin Warsh.

With investors all-but-certain the central bank will keep rates unchanged, focus will be on Warsh's remarks

for a sense of where borrowing costs are headed.

"Any stock market volatility caused by Warsh's commentary Wednesday is a buying opportunity in our view since the market fundamentals remain in place," Main Street Research said.

Brent crude futures were hovering near $79 a barrel, their lowest level since the first few days of the Iran war.