US stocks opened lower on Thursday as oil prices tumbled for the first time in four days, pressuring energy stocks.
The Dow Jones Industrial Average was down 36.78 points, or 0.2% at 17,968.27.
The S&P 500 was down 6.33 points, or 0.3% at 2,112.79.
The Nasdaq Composite was down 18.55 points, or 0.37% at 4,956.09.