What the Midterms Actually Mean for Your Portfolio

Every two years, the same headlines resurface: midterm elections are coming, and markets are bracing for turbulence. With the 2026 midterms set for November 3 — when all 435 House seats, 35 Senate seats, and 36 governorships are on the ballot — it's worth separating the historical pattern from the noise, and looking at what's actually different this time around.

The Historical Pattern

Midterm years have a well-documented reputation as rough stretches for stocks. Going back to 1970, midterm election years have historically ranked among the weakest-performing years for the S&P 500. One widely cited estimate puts the average peak-to-trough drawdown during midterm years at around 18%, driven by the policy uncertainty that tends to build as control of Congress hangs in the balance.

But the pattern doesn't stop at the ballot box — it reverses after it. Multiple research desks have found that markets have historically rallied in the months following a midterm election, often outpacing their own long-run averages, regardless of which party ends up in control of Congress.¹ Analysts generally attribute this "relief rally" not to any particular election outcome, but simply to the removal of uncertainty — once results are in, investors can price in whatever the new political reality actually is rather than guessing at it.

Why 2026 Looks Different So Far

This year has broken from the historical script in an important way: instead of the typical rocky first half, 2026 stock returns have diverged from historical midterm-year patterns, with equities showing resilience despite concerns over higher oil prices, tariffs, and the possibility of further rate hikes. By late August, the S&P 500 had returned roughly 14% for the year,² and the correction that did occur — a roughly 9% peak-to-trough decline in March — was notably milder than the historical midterm-year average drawdown.

That said, strategists are flagging a cloudier back half of the year. Concerns have grown around whether AI-related valuations have run too far ahead of fundamentals and whether the Fed can keep inflation in check while balancing growth. Several major research desks argue elections themselves are not the primary driver here — midterms have historically had only a modest effect on markets, with equities rarely showing sustained outperformance or underperformance in the three to six months after a vote, while rate markets track Fed policy far more than election results. The bigger swing factors, in other words, remain trade policy, monetary policy, corporate earnings, and geopolitics — not who wins the House.

The Political Backdrop

Heading into November, control of Congress is genuinely up for grabs. Republicans currently hold narrow majorities, with 218 House seats and 53 Senate seats as of mid-July, margins thin enough that a modest shift in either chamber would flip control. Forecasters at several firms see Democrats as modestly favored to retake the House while Republicans hold an edge in the Senate — a setup that would produce divided government, which historically limits the odds of sweeping new legislation but raises the stakes around routine flashpoints like spending deadlines and the debt ceiling.

Sectors Investors Are Watching

Divided government tends to reshuffle sector expectations rather than the market as a whole. Analysts point to a few areas worth watching:

• Defense, technology, and financial services could benefit from a gridlocked Congress, since major regulatory overhauls become harder to pass.
• Energy, health care, and private equity may see more scrutiny — health care in particular faces questions around tariffs, drug pricing reference policies, and reimbursement models, while private equity could face increased scrutiny through federal investigations, especially in health care, housing, and consumer-facing industries.
• Digital assets are a wildcard, as the industry pushes Congress for clearer rules around custody, payments, and stablecoins, and the outcome could either accelerate or complicate institutional adoption.

The Practical Takeaway

Nearly every major research desk — Fidelity, Morgan Stanley, Schwab, BlackRock, JPMorgan Chase — lands on a similar bottom line: don't trade the headlines. Trying to time a portfolio around an election outcome is a difficult bet even for professionals, because the connection between which party wins and how markets subsequently perform is far weaker than most people assume. The stronger, better-documented relationship is between markets and the underlying economy — earnings growth, inflation, and interest rates — which tend to matter more over any meaningful time horizon than who controls the House or Senate.

That doesn't mean the run-up to November will be quiet. Volatility around election season is normal, arguably a feature of the process rather than a warning sign. But for long-term investors, the historical playbook remains fairly consistent: stay diversified, resist the urge to make big sector bets based on political predictions, and treat the weeks before and after the vote as noise to sit through rather than a signal to act on.

This post is for general informational purposes and isn't personalized investment advice. Past market performance doesn't guarantee future results, and anyone making portfolio decisions around specific events should consider talking with a financial advisor about their own situation.