Oil prices fell on Monday, and pared their early gains, lifted by hopes about the US stimulus.
The US House of Representatives passed President Joe Biden's $1.9 trillion Covid-19 relief package.
The dollar index rose against a basket of currencies by 0.2% to 91.08 points as of 19:33 GMT, after it hit a high of 91.1 points and a low of 90.6 points.
Most governments around the world are working relentlessly to end the Covid-19 pandemic with vaccination, and the US health authorities approved Johnson & Johnson's Covid-19 single-shot vaccine.
As of 18:30 GMT, WTI crude March futures fell 2% to $60.2 a barrel, after hitting a day high of $62.9 and a low of $59.9.
Brent May futures fell 1.5% to $63.4 a barrel, after hitting a high of $65.9 and a low of $63.1.