US stock futures held steady as investors brace for the results of US presidential election, which are expected to roll in over the next several hours.

Near 6 p.m. ET, contracts on the tech-heavy Nasdaq 100 (NQ=F) climbed about 0.1% while S&P 500 futures (ES=F) also moved roughly 0.1% higher. Dow Jones Industrial Average futures (YM=F) were up about 0.2% on the heels of a winning day for stocks.

Stocks finished Tuesday's session solidly in the green as Americans flocked to the polls to decide whether Kamala Harris or Donald Trump will become the next president.

Polls in a select number of states, like Indiana and Kentucky, have now officially closed. The rest of the country will shut down their respective polling stations within the next few hours, with most polling sites set to close by 11 p.m. ET.

As the results start to trickle in, investors will closely scrutinize any movement in stock futures, given the possibility of short-term market volatility. It's possible the outcome of the election may not become clear for days, or even weeks, if the result is disputed.

Read more: The Yahoo Finance guide to the presidential election and what it means for your wallet

Heading into Tuesday, betting markets tightened while national polls showed both candidates in a virtually deadlocked race. Polls in key battleground states like Pennsylvania, Michigan, and Wisconsin, which are likely to decide the fate of the election, also showed razor-thin margins.

But the results will soon become known. Both Harris and Trump have made their final pitch to voters. Trump pledged last-minute tariffs and less money for chips while Harris promised to "seek common ground" in her final rally in Philadelphia on Monday.

LIVE 1 update