BIST 100 vs S&P 500: which is stronger each month?
BIST 100 has been strongest in April (+7.43%) and weakest in May (-2.67%). S&P 500 has been strongest in July (+1.67%) and weakest in September (-1.12%). BIST 100 had the higher average in 9 of 12 months, and the two pointed the same way in 7 of 12.
Month by month
| Month | BIST 100 average | BIST 100 up years | S&P 500 average | S&P 500 up years | Stronger |
|---|---|---|---|---|---|
| January | +3.37% | 69% | +1.21% | 63% | BIST 100 |
| February | +0.58% | 52% | -0.11% | 52% | BIST 100 |
| March | -0.10% | 48% | +0.42% | 61% | S&P 500 |
| April | +7.43% | 76% | +1.36% | 66% | BIST 100 |
| May | -2.67% | 34% | +0.13% | 61% | S&P 500 |
| June | +0.82% | 55% | +0.79% | 57% | BIST 100 |
| July | +4.70% | 66% | +1.67% | 61% | BIST 100 |
| August | -1.28% | 50% | +0.70% | 59% | S&P 500 |
| September | +1.44% | 53% | -1.12% | 45% | BIST 100 |
| October | +4.28% | 62% | +0.55% | 59% | BIST 100 |
| November | +3.98% | 52% | +1.01% | 62% | BIST 100 |
| December | +7.13% | 76% | +1.27% | 72% | BIST 100 |
BIST 100 since 1997, S&P 500 since 1928, monthly close to close, as of October 16, 2026. The highlighted row is the current month. Monthly correlation over the last 16 years: 0.32.
More on each market
Questions
What is the best month for BIST 100?
Since 1998, April has averaged +7.43% for BIST 100, higher in 76% of 29 years.
What is the best month for S&P 500?
Since 1928, July has averaged +1.67% for S&P 500, higher in 61% of 99 years.
Do BIST 100 and S&P 500 move together?
Over the last 16 years their monthly moves had a correlation of 0.32, where 1 means they always move together and 0 means no link.
History describes the past. Not investment advice.
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Not investment advice. Market Seasonality publishes historical statistics, news summaries and scenario analysis for information and education. Past patterns do not guarantee future results. Nothing here is a recommendation to buy, sell or hold any asset, and scenarios describe possible paths without predicting them. See the disclaimer and methodology.