Major U.S. stock-indexes rose on Friday, with the S&P 500 on track for its best week in a year, as healthcare and consumer stocks rose.

The Dow Jones industrial average turned positive for the year, led by a 4.6% rise in Nike (NKE) which announced a $12 billion share buyback and share split.

Healthcare was the top gainer among the 10 major S&P sectors, led by Allergan's (AGN) 3.3% increase. The drugmaker rose on reports that the U.S. Treasury's new tax inversion rules were unlikely to thwart its proposed deal with Pfizer (PFE).

Most of Dow stocks in positive area (22 of 30). Top looser - Chevron Corporation (CVX, -0.97%). Top gainer - NIKE, Inc. (NKE +4.31%).

Most of S&P index sectors also in positive area. Top looser - Basic Materials (-0.6%). Top gainer - Conglomerates (+1,6%).

At the moment:

Dow 17804.00 +97.00 +0.55%

S&P 500 2087.75 +8.50 +0.41%

Nasdaq 100 4678.75 +18.75 +0.40%

Oil 41.77 +0.05 +0.12%

Gold 1077.20 -0.70 -0.06%

U.S. 10yr 2.24 -0.01