Monthly ATH-Count Barometer
September 2026: 0 new ATHs (below 6 threshold)
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New all-time-high count in a given calendar month (default current). When the S&P 500 makes many new highs in a month, the rest of the year tends to be strongly positive.
- 6 signals since 1950-01-01.
- September 2026: 0 new ATHs (below 6 threshold)
September ATHs (2026)
0
need 6
Qualified Years
6
since 1950
RoY Median
+4.8%
83% win
September = Peak
2/24
yrs month was yearly peak (after an ATH)
When to run this study
Run at month-end. Counts the S&P 500 new all-time highs made in the target month (default current month); when >= threshold, the rest of the year has historically been strongly positive. Generalizes the Finom "6+ ATHs in May" quant to any month.
Historical results
Years with 6+ ATHs in September (6)
| Year | September ATHs | Rest-of-Year % | September=Yearly Peak? |
|---|---|---|---|
| 2025 | 8 | 2.35 | — |
| 2017 | 9 | 6.12 | — |
| 1995 | 10 | 5.39 | — |
| 1967 | 7 | -0.25 | Yes |
| 1955 | 10 | 4.14 | — |
| 1954 | 10 | 11.36 | — |