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.

U.S. stocks are drifting in early trading after leaping to records the day before as part of a worldwide rally.

Wall Street ticked slightly higher as markets awaited an expected interest rate cut by the U.S. Federal Reserve, the first in more than four years.