Stock market live Monday: Dow down 100 points, Tesla leads Nasdaq to record, Palantir up 21%

The Dow Jones Industrial Average and S&P 500 declined on Monday, giving back some of the gains from Friday's record-setting session as a jump in Covid-19 cases hit sentiment. The Nasdaq Composite, however, traded in the green, rising to a new all-time high amid strength in Big Tech names like Apple and Tesla.