Major U.S. stock-indexes slightly fell on Friday, as investors preferred to wait and watch Federal Reserve Chair Janet Yellen's speech for a steer on the chances of an interest rate hike this month. Yellen could support a rising sentiment among policymakers for an increase in rates amid data pointing to an improving U.S. economy.

Most of Dow stocks in negative area (20 of 30). Top loser NIKE, Inc. (NKE, -1.52%). Top gainer - The Goldman Sachs Group, Inc. (GS, +0.65%).

S&P sectors mixed. Top loser - Utilities (-0.4%). Top gainer - Basic Materials (+0.3%).

At the moment:

Dow 20973.00 -33.00 -0.16%

S&P 500 2378.00 -4.00 -0.17%

Nasdaq 100 5359.25 -5.50 -0.10%

Oil 53.18 +0.57 +1.08%

Gold 1224.80 -8.10 -0.66%

U.S. 10yr 2.51 +0.02