NEW YORK — U.S. stocks are rallying Tuesday as voters head to the polls on the last day of the presidential election and as more data piles up showing the economy remains solid.

The S&P 500 was up 1% in midday trading, rising closer to its record set last month. The Dow Jones Industrial Average was up 334 points, or 0.8%, as of 11:35 a.m. Eastern time, while the Nasdaq composite was 1.3% higher.

Treasury yields also rallied after a report showed growth for retailers, transportation companies and other businesses in the U.S. services industries accelerated last month. That was despite economists’ expectations for a slowdown, and the Institute for Supply Management said it was the strongest growth since July 2022.

The strong data offered more hope that the U.S. economy will remain solid and avoid a long-feared recession following the worst inflation in generations.

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AI Boom Lifts Market Sentiment

Excitement about the artificial-intelligence boom also helped lift the stock market, as it has for much of the last year. Software company Palantir Technologies jumped 22.7% after delivering bigger profit and revenue than analysts expected for the latest quarter. It’s an industry known for thinking and talking big, and CEO Alexander Karp said, “We absolutely eviscerated this quarter, driven by unrelenting AI demand that won’t slow down.”

It helped offset a 6.5% drop for NXP Semiconductors. The Dutch company fell to one of the largest losses in the S&P 500 after warning that weakness it saw in the industrial and other markets during the latest quarter is spreading to Europe and the Americas.

Election Day and Federal Reserve Meeting in Focus

The market’s main event, though, is the election, even if the result may not be known for days, weeks or months as officials count all the votes. Such uncertainty could upset markets, along with an upcoming meeting by the Federal Reserve on interest rates later this week. The widespread expectation is for it to cut its main interest rate for a second straight time, as it widens its focus to keeping the job market solid in addition to getting inflation under control.

Despite all the uncertainty heading into the final day of voting, many professional investors suggest keeping the focus on the long term and what corporate profits will do over the next few years and a decade. The broad U.S. stock market has historically tended to rise regardless of which party wins the White House, even if each party’s policies help and hurt different industries’ profits underneath the surface.

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Historical Market Performance and Election Outcomes

Since 1945, the S&P 500 has risen in 73% of the years where a Democrat was president and 70% of the years when a Republican was the nation’s chief executive, according to Sam Stovall, chief investment strategist at CFRA.

The U.S. stock market has tended to rise more in magnitude when Democrats have been president, in part because a loss under George W. Bush’s term hurt the Republican’s average. Bush took over as the dot-com bubble was deflating and exited office when the 2008 global financial crisis and Great Recession were devastating markets.

Besides who will be president, other questions hanging over the market include whether the White House will be working with a unified Congress or one split by political parties, as well as whether the results will be contested.

The general hope among investors is often for split control of the U.S. government because that’s more likely to keep the status quo and avoid big changes that could drive the nation’s debt much, much higher.

As for a contested election, Wall Street has some precedent to look back to. In 2000, the S&P 500 dropped 5% in about five weeks after Election Day before Al Gore conceded to George W. Bush. That, though, also happened during the near-halving of the S&P 500 from March 2000 to October 2002 as the dot-com bubble deflated.

Four years ago, the S&P 500 rose the day after polls closed, even though a winner wasn’t clear yet. And it kept going higher even after former President Donald Trump refused to concede and challenged the results, creating plenty of uncertainty. A large part of that rally was due to excitement about the potential for a vaccine for COVID-19, which had just shut down the global economy.

The S&P 500 ended up rising 69.6% from that Election Day in 2020 through Monday, following President Joe Biden’s win. It set its latest all-time high on Oct. 18, as the U.S. economy bounced back from the COVID-19 pandemic and managed to avoid a recession despite a jump in inflation.

In the prior four years, the S&P 500 rose 57.5% from Election Day 2016 through Election Day 2020, in part because of cuts to tax rates signed by Trump.

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Investors have already made moves in anticipation of a win by either Trump or Vice President Kamala Harris. The value of the Mexican peso might fall if Trump’s tariffs on Mexico come to fruition, for example.

But Paul Christopher, head of global investment strategy at Wells Fargo Investment Institute, suggests not getting caught up in the pre-election moves, or even those immediately after the polls close, “which we believe will face inevitable tempering, if not outright reversals, either before or after Inauguration Day.”

In the bond market, the yield on the 10-year Treasury rose to 4.36% following Tuesday morning’s strong report on U.S services businesses from 4.29% late Monday.

In stock markets abroad, indexes were mixed in Europe and Asia. The moves were mostly modest outside of jumps of 2.3% in Shanghai and 2.1% in Hong Kong.