Election Day USA: what the midterms mean for stocks

What history shows. CNBC looked at the S&P 500 after US elections since 1980. For presidential and midterm elections combined, the average move was +0.2% after one day, +0.2% after one week and +1.1% after one month. One year after midterms the average was +13.7%, and after presidential elections +13.8%. The index was higher a year later after all 11 midterms from 1982 to 2022.

Divided government. CNBC counts 15 cases of divided government (10 midterms and 5 presidential elections). The average one-year gain was 15%, and it was positive in 14 of the 15 cases. Under single-party control the average one-year gain was 11.5%. The sample is small, so treat this with care. That caution is ours.

Not a rule. In 2018 the S&P 500 ended the year down 6.2%, while the Fed raised rates four times. A year after that election it was up 11.7%. Ned Davis Research, quoted by Reuters, studied eight midterm cycles since 1930 in which the president's party lost the House. The S&P 500 rose for the rest of the year five times out of eight. The median gain from Election Day to year-end was 1.4%, against 1.9% across all midterm years.

What investors are gaming out. According to Reuters, a divided Congress raises the risk of government shutdowns and debt-limit fights. Investors are already worried about large deficits and rising interest costs. If Democrats win both chambers, investors expect tougher oversight of AI. If Republicans keep control of Congress, JPMorgan strategists say it would likely give the most supportive federal backdrop for the AI buildout. Analysts also say tax changes or higher defence spending could widen the deficit. Ebury analyst Diego Barnuevo expects the debt ceiling to come to the fore in 2027.

The backdrop. Reuters reports that since the current president returned to the White House in 2025, the S&P 500 has gained about 27%, helped by vast AI spending and strong earnings. Treasury yields are also substantially higher. Deutsche Bank's Jim Reid noted in a note that seasonality is not destiny.

What to check. Look not only at who wins, but at the split between the House and the Senate. You can see the latest index price on our S&P 500 page: https://freekonomist.com/stocks/spx/ . What top market voices think is at https://freekonomist.com/crowd/ . This is an overview, not advice.

حقائق مؤكدة

• According to CNBC, since 1980 the S&P 500 was on average up 13.7% one year after midterms and 13.8% one year after presidential elections.^[1]
• According to CNBC, the S&P 500 was higher a year later after all 11 midterms from 1982 to 2022.^[1]
• According to CNBC, for presidential and midterm elections combined the S&P 500 average was +0.2% after one day and one week, and +1.1% after one month.^[1]
• According to CNBC, under divided government (10 midterms and 5 presidential elections) the average one-year S&P 500 gain was 15%, positive in 14 of 15 cases; under single-party control it was 11.5%.^[1]
• In 2018 the S&P 500 ended the year down 6.2% while the Fed raised rates four times; a year after the election the index was up 11.7%.^[1]
• According to Ned Davis Research (via Reuters), since 1930 there have been eight midterm cycles in which the president's party lost the House; the S&P 500 rose for the rest of the year five times, with a median gain of 1.4% from Election Day to year-end, against 1.9% across all midterm years.^[2]
• According to Reuters, since the current president returned to the White House in 2025 the S&P 500 has gained about 27%, and Treasury yields are substantially higher.^[2]
• According to Reuters, a divided Congress raises the risk of government shutdowns and debt-limit brinkmanship.^[2]
• According to Reuters, if Democrats win both chambers, investors expect tougher oversight of AI.^[2]
• According to Reuters, JPMorgan strategists say continued Republican control of Congress would likely give the most supportive federal backdrop for the AI buildout.^[2]
• According to Reuters, Ebury analyst Diego Barnuevo expects the debt ceiling to come to the fore in 2027.^[2]

التبعات

• مؤكدHistorically the S&P 500 was most often higher a year after midterms, but that is an average of past years, not a promise.
• مؤكدInvestors are already gaming out scenarios on control of Congress, spending, AI and the debt ceiling.
• قراءتناThe result will probably matter for markets less on its own than through what comes next on the budget, debt and AI rules. This is our view.

لا يزال مجهولًا

• Who wins control of the House and the Senate
• How markets react in the first days
• What the new Congress decides on the budget, the debt ceiling and AI rules

من يتأثر

USA, World. People who follow US stocks and want to understand what the midterms mean for markets

المصادر

1. CNBC: Stock market after midterm elections: What S&P 500 history shows 2 نوفمبر 2026 · إعلام
2. Reuters: What the US midterms could mean for markets, AI and the debt ceiling 2 نوفمبر 2026 · إعلام