MARKET/HEATMAP

Monthly Seasonality

Year

2026

Instrument

10-Year Seasonality · 2016 – 2025

S&P 100 /OEX

2026 YTD

+6.21%

10Y Avg full year

+15.52%

Green months

10/12

Avg up

Avg down

2026

2026 · 10Y context

APR had the biggest gap — actual +11.50% vs avg +1.17% (huge outperform)
JUN actual -3.39% vs avg +2.23% (huge underperform)
MAR actual -4.82% dipped deep while avg was +0.39%
JUL is historically the most reliable up-month (avg +3.47%, 100% win) — coming up
SEP is historically the weakest month (avg -1.39%)
Next up · JUL: 10Y avg +3.47% — expects strength (100% win)