Hopes that a Democratic sweep will speed up the approval of more stimulus for the U.S. economy are likely fuelling investors' optimism.

The Dow and the S&P 500 soared to all-time highs on Wednesday, but pared earlier gains after protesters stormed the U.S. Capitol.

The electric car marker would be the 10th largest company in the index.

The technology-centric Nasdaq led the declines as its heavyweight stocks took a hit with the biggest drags from companies including Facebook Inc, Apple Inc, Amazon.com Inc, Microsoft Inc and Google-parent Alphabet Inc.

Wall Street clawed back the last of the historic, frenzied losses unleashed by the new coronavirus, as the S&P 500 closed at an all-time high Tuesday.

An uptick in U.S. cases and a bleak economic forecast from the U.S. Federal Reserve are sending stocks plunging.

Canada's benchmark stock index inched higher thanks as oil prices moved up.

In Toronto, however, Canada's benchmark index was up in early trading.

Canadian and U.S. stock indeces were on different paths at the start of the trading week on Monday.

Concern about economic damage from the virus has dampened a brief bout of investor optimism.