S&P 500 Enters Its Strongest Seasonal Window Amid Inflation Concerns
Current overview (not historical)
The S&P 500 has entered its historically strongest seasonal window, with data since 1950 showing the index rising from mid‑October to year‑end in 80% of years. Even after a recent pullback following a record high, the index has already risen in 61 of the observed years, with a median gain of 4.2%. However, the outlook is being weighed down by hotter U.S. inflation and the possibility of secondary rate hikes. Analysts note that the performance of third‑quarter earnings growth—estimated at 29.2%—will be a critical factor in determining whether the 80% probability of a year‑end rally holds true.
Written with AI from the reporting · updated 10/15/2026
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- 1Unclassified fact stationOct 15, 00:00recorded Oct 15, 10:27single source
S&P 500 enters strongest seasonal window
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- Subject：
- S&P 500
- Action：
- entered seasonal window
- Object：
- index performance from mid-October to year-end
- Occurred (fact side)：
- Oct 15, 00:00
- Published (valid side)：
- Oct 15, 09:00
- First seen (known side)：
- Oct 15, 10:27
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- BeInCryptoRelated fact: single sourceS&P 500 enters strongest seasonal window since 1950
Report first recorded Oct 15, 10:27
The S&P 500 seasonal window opened on Wednesday, with historical data showing the index has risen from mid-October to year-end in 80% of years since 1950. From the Oct 13 close to year-end, the S&P 500 gained in 61 of 76 years, with a median gain of 4.2%, compared to an average period return of about 2% in 66% of cases. Despite recent record highs followed by a 0.75% fall, hotter US inflation (3.7% year-on-year in September) and potential Fed hikes pose risks, though a four-year bull market and expected third-quarter earnings growth of 29.2% provide a fundamental base.
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