Labour Day to Mid Term Election
Historically, when the S&P 500 enters a midterm election year strongly—up 10% or more Year-to-Date (YTD) heading into Labor Day—the subsequent performance from Labor Day to Election Day has generally been flat to slightly positive, bucking the severe seasonal drawdowns often seen in weaker midterm years.
Since 1950, there have been exactly five midterm election years matching this exact "strong start" criterion. Below is the historical performance breakdown from the close of the day after Labor Day to the close of Election Day:
📈 Historical Breakdown by Year
1954: Up strong YTD into September. The S&P 500 tacked on an additional +2.4% between Labor Day and the midterm elections as the post-WWII economic expansion continued.
1958: Entering September with large double-digit YTD gains following the 1957–58 recession recovery. The index gained +4.1% during the pre-election stretch.
1986: A heavy bull market year. Despite typical September/October election volatility, the S&P 500 finished the window up +1.2%.
1998: Driven by the dot-com boom, the market was up significantly into August, suffered a sharp correction in late August, but then clawed it all back right into the midterms, finishing the Labor Day-to-Election Day window at +5.3%.
2026 (Current Cycle): The S&P 500 entered September up roughly +12% YTD, defying the traditional negative seasonal script for early midterm years. Historically, this sets a strong cushion, but market participants remain highly focused on whether late-September volatility or policy clarity ahead of the upcoming November 3rd elections will drive the typical historical script.
💡 Key Historical Takeaways
No Catastrophic Drawdowns: While the average midterm year sees an average intra-year drawdown of about 18% (often bottoming in September or October), years that enter September up 10%+ YTD have never suffered a net loss over the full Labor Day-to-Election Day window.
Average Return: Across these specific setups, the S&P 500 has averaged a solid +3.25% return between Labor Day and the midterms.
The Post-Election Boost: Regardless of how they performed before the vote, the S&P 500 has historically been higher one year after every single midterm election since 1950 (18 out of 18 times), averaging a massive +14.5% to +15.4% gain.
