Major U.S. stock-indexes higher on Friday, bolstered by a surge in crude oil and Federal Reserve Chair Janet Yellen's comments pointing to resilience in the U.S. economy. U.S. crude rose 5% on rising hopes that top producers would agree to freeze output and economic indicators in the United States and Europe would push demand higher. Yellen, in an appearance with former Fed chairmen on Thursday, said the U.S. economy was on a solid course with some hints of inflation, putting the central bank on track for a gradual increase in interest rates this year.

Most of Dow stocks in positive area (22 of 30). Top looser - NIKE, Inc. (NKE, -0,90%). Top gainer - American Express Company (AXP, +2,19%).

Almost all S&P sectors in positive area. Top looser - Healthcare (-0,1%). Top gainer - Basic Materials (+3,0%).

At the moment:

Dow 17568.00 +110.00 +0.63%

S&P 500 2049.25 +14.25 +0.70%

Nasdaq 100 4488.50 +18.25 +0.41%

Oil 39.68 +2.42 +6.49%

Gold 1240.60 +3.10 +0.25%

U.S. 10yr 1.73 +0.04