Biden extended narrow leads in Pennsylvania and Georgia, putting him on the verge of winning the White House, although President Donald Trump has filed lawsuits in battleground states to contest the results.
The three benchmark US stock indexes were on track for their biggest weekly percentage gains since April as the prospect of a policy gridlock in Washington eased worries a Biden administration might tighten regulations on US companies.
"It's not fairytale land, we don't go up every day so at some point you would think we would see a little bit of downward pressure," said JJ Kinahan, chief market strategist at TD Ameritrade in Chicago.
Control of the US Senate could hinge on four as-yet undecided races. If Republicans retain their majority, they would likely block large parts of Biden's legislative agenda, including expanding healthcare and fighting climate change.
"If that is not a split congress, let's face it, that is one of the reasons we rallied this week, it has less to do with the stimulus and more to do with a long-term view," Kinahan said.
The government's closely watched report showed unemployment dropped sharply to 6.9 per cent last month from 7.7 per cent in September, but job recovery slowed as fiscal support waned and coronavirus cases surged.
After the jobs report, US Senate Majority Leader Mitch McConnell said economic statistics indicated Congress should enact a smaller coronavirus stimulus package that is highly targeted at the pandemic's effects.
The Dow Jones Industrial Average fell 60.93 points, or 0.21 per cent, to 28,329.25, the S&P 500 gained 1.27 points, or 0.04 per cent, to 3,511.72 and the Nasdaq Composite added 15.86 points, or 0.13 per cent, to 11,906.79.
Coty Inc surged 17.63 per cent as the cosmetics maker beat analysts' estimates for quarterly revenue, while T-Mobile US Inc gained 5.61 per cent after adding more phone subscribers than analysts had expected in the third quarter.
Electronic Arts Inc slumped 6.52 per cent after the video game maker fell short of quarterly sales estimates.
Declining issues outnumbered advancing ones on the NYSE by a 1.29-to-1 ratio; on Nasdaq, a 1.41-to-1 ratio favored decliners.
The S&P 500 posted 43 new 52-week highs and no new lows; the Nasdaq Composite recorded 123 new highs and 24 new lows.