U.S. Federal Reserve Governor Christopher Waller, one of the more ardent voices in the central bank's battle to hike interest rates to tame inflation, said he supported a larger rate cut this week because he is now worried the pace of price increases is undershooting the Fed's target.

U.S. stock index futures edged lower on Friday, pausing after the previous session's rally set Wall Street's main indexes on track for weekly gains following the Federal Reserve's pivotal stance on monetary policy earlier in the week.

Wednesday’s consumer-price index for August may end up being the deciding factor as to whether the Federal Reserve will deliver a bigger-than-usual, 50-basis-point rate cut on Sept. 18.