With the 2026 U.S. midterm vote approaching, a historical measure showed the S&P 500 gained in all 21 cycles, averaging 16.6% across the measured period.
The window ends in June after the midterm and begins in November of the election year, so it does not cover the full post-election calendar year. The S&P 500 comprises 500 companies and covers about four-fifths of U.S. market capitalization available to investors.
A separate calculation for the full calendar year after midterm elections showed an average S&P 500 price return of 17.2% across 19 cycles from 1950 through 2025. That historical average does not establish a forecast for 2027.
EconoTimes previously examined a 12-month post-midterm record based on J.P. Morgan Asset Management data dating to 1950. That covers a different period from the November-to-June measure. U.S. midterm voting is set for Nov. 3, 2026.
