US stock market opens lower

NEW YORK (AA) - U.S. stock markets opened lower Thursday following Wednesday’s all-time high closes.

The Dow Jones lost five points to begin trading at 21,109, and the S&P 500 fell four points to start the day at 2,391.

The Nasdaq decreased 10 points to open at 5,893.

All three main indices closed Wednesday at all-time highs, and the Dow climbed above the 21,000 threshold for first time in history.