NEW YORK (Reuters) - U.S. stock index opened lower on Friday, putting major indexes on track for a sharply lower week, as concerns about global economic growth persisted.
The Dow Jones industrial average fell 14.48 points, or 0.09 percent, to 16,644.77, the S&P 500 lost 4.62 points, or 0.24 percent, to 1,923.59 and the Nasdaq Composite dropped 33.23 points, or 0.76 percent, to 4,345.10.
(Reporting by Chuck Mikolajczak; Editing by Nick Zieminski)
