US stock indices fell on Tuesday, amid anticipation of more quarterly business results.
The earnings results of major companies, led by Apple, Microsoft, Tesla, Amazon and Alphabet will be released later.
The dollar index rose against a basket of currencies by 0.2% to 91.2 points as of 18:25 GMT, after it hit a high of 91.2 points and a low of 90.8 points.
Efforts to contain the Covid-19 pandemic are continuing, as the US company Johnson & Johnson reported $100 million sales of its vaccine during the first quarter.
To the oil market, To the oil market, WTI crude May futures fell 1.5%, or 94 cents, and closed at $62.44 a barrel, after hitting a high of $64.2 and a low of $61.5.
Brent June futures fell 0.7% or 48 cents, and closed at $66.57 a barrel, after hitting a high of $68.08 and a low of $65.5.
As for stocks, Dow Jones fell 0.7% or 256 points, and closed at 33,821, with a day high of 34,034, and a low of 33,687.
Nasdaq fell 0.9% or 128 points to 13,786, with a high of 13,927 and a low of 13,698 points.
S&P 500 fell 0.7% or 28 points to 4,134, after hitting a high of 4,159 and a low of 4,118.