The comments follow a softer-than-expected inflation report last week, which had buoyed hopes that the Fed could scale back its hefty interest rate hikes and helped drive a euphoric market rally.
The S&P 500 in the previous session logged its biggest weekly percentage gain in about five months, while the tech-heavy Nasdaq (.IXIC) notched its best week since March.
"The market is expecting the Fed to continue its hawkish rhetoric on rates.
ET, the S&P 500 (.SPX) was down 17.25 points, or 0.43%, at 3,975.68, and the Nasdaq Composite (.IXIC) was down 115.13 points, or 1.02%, at 11,208.20.
The S&P 500 information technology sector (.SPLRCT) was down 1.2% and among the leading sectoral decliners on the benchmark index.