Goldman Sees S&P 500 Volatility Spiking Into Midterms - But History Says Don't Panic

Late-summer sideways action is the historical pattern

The timing mistake is easier to make than the downside risk

The main risk now is not a sudden crash. It is misreading the calendar. Goldman expects rising policy uncertainty and market volatility into November, and the historical record supports that caution. Since 1974, the S&P 500's median return from the start of August through Election Day in midterm years has been 0%. In practice, late summer around midterms often chops sideways rather than trends clearly higher or lower.

That is why August weakness can be easy to overreact to. When headlines grow louder and drive more trades than earnings, investors can mistake ordinary election-year noise for the start of a serious break in the trend. The bigger mistake is treating a messy few weeks as automatic proof that the bear case has won.

The better historical outcome usually comes after the vote

The more supportive pattern tends to appear after the election, not before it. Goldman says the S&P 500 has delivered a median gain of 6% over the three months following midterm elections, and other reviews show markets often perform worse during midterm election years before improving later in the calendar year.

So the practical test is not whether August stays choppy. It is whether investors confuse sideways friction with lasting damage. If political uncertainty fades after the vote, the market may have already shaken out a lot of unnecessary caution.

Why market noise can build before Election Day

The market can get noisier before the vote for a mechanical reason: the same conditions that have kept the index calm can also set up a sharper volatility spike later. Goldman's point is that record-low correlations across individual stocks have muffled broad index swings even as volatility at the stock and factor level has risen. Think of a large group walking in different directions. The crowd as a whole does not lurch anywhere, so index-level movement looks tame. But if a single message suddenly makes investors react to the same macro signal, stocks can start moving together more quickly.

Why the run-up can be messier than the result

That is the setup Goldman warns about now. It says implied stock correlations are near record lows just as the market begins focusing more on elections, inflation, geopolitics, and rates. In plain English, the market has been quiet at the index level partly because stocks have been driven by separate stories. Once investors start pricing a common macro shock, that quiet can fade.

The build-up matters because policy uncertainty can affect businesses, households, and governments at the same time. When that uncertainty rises, investors often hedge, trim risk, or pay up for protection. That does not mean the final election outcome will fundamentally reshape the economy. It means the path to the outcome can force more coordinated risk management.

The academic evidence fits that uneven rhythm. A broad event study found high abnormal volatility in pre-election months and during election weeks, but also low abnormal volatility in some pre-election weeks and election months. In other words, the run-up and the event itself can be turbulent, while some surrounding windows still look deceptively calm.

Treasury yields may matter more than the election outcome

The late-summer chop is the visible part of the setup, but the bigger repricing risk may be in bonds. Goldman's point is not that politics is irrelevant. It is that the election outcome itself is unlikely to be a major driver compared with the economic variables that change valuations in real time. In this setup, rates can matter more than rhetoric because they directly affect the cost of capital, balance-sheet pressure, and the price investors are willing to pay for future earnings.

Why the bond market is the more immediate watchpoint

Goldman notes that unusually low stock correlations have helped keep the broad index from spiking, even as macro issues start to dominate. Implied stock correlations are near record lows just as investors focus more on inflation, geopolitics, and rates. That is a fragile mix.

Using the same crowd analogy: if rising yields push investors to focus on the same macro force at once, more stocks begin moving together. That is when volatility can stop feeling diversified and start feeling expensive.

Goldman also warns that rising Treasury yields could add further pressure on equities. Politics may be the soundtrack, but rates could be the engine of the next real market move.

Divided government may be easier for markets to absorb than higher financing costs

If prediction markets already imply a high probability of divided government, that political setup may be easier for markets to price than a sharp reset in financing conditions. The more immediate danger is more concrete: a rapid move in the 10-year Treasury yield toward 5%, or real yields toward 2.7%. A faster move higher would hit growth stocks, long-duration assets, and highly leveraged companies all at once.

Bulls still have a real argument: the election outcome itself may prove less important than macro conditions, and Goldman sees equity index volatility as more attractive partly because positioning has assumed macro risk has disappeared. If yields stay contained, this may remain a stressful trade rather than the start of a broader business-cycle break.