Wall Street closed mixed Thursday as crude prices dipped to their five-month low and the House of Representatives voted in favor of repealing and replacing former President Barack Obama's healthcare law.
The Dow fell six points to end trading at 20,951.
The S&P, however, added one points to close at 2,389 and the Nasdaq rose two points to reach 6,075.
Oil prices fell around 4.9 percent, plunging to their lowest level since Nov. 30.
At the final bell, the American benchmark West Texas Intermediate was trading at $45.39 a barrel, while international benchmark Brent crude was at $48.28 per barrel.
The House of Representatives voted 217-213 to repeal and replace Affordable Care Act, widely known as Obamacare, which was seen as a first major victory for President Donald Trump's Republican administration.
After the victory, investors' confidence towards the administration has increased, experts said, adding that investors now expect Trump to deliver on his much-anticipated promise of lowering corporate taxes.
By Ovunc Kutlu in New York