The S&P 500 index recently completed an impressive seven-month streak of positive monthly returns, a feat that historically occurs only once every five years. This achievement has raised questions about what lies ahead for the index, prompting an analysis of historical performance after similar streaks.
Understanding the Streak
In November 2025, the S&P 500 (^GSPC) wrapped up its seventh consecutive positive month. After this remarkable run, the index experienced a slight decline of 0.05% in December, followed by a rise in January. February appeared to follow a downtrend before the final bell rang.
The latest streak from May to November 2025 marked the 21st time the S&P 500 has achieved such a feat over the past century. To assess the implications of this seven-month streak, it is vital to review the index’s performance following previous similar instances.
Historical Performance Analysis
A thorough examination of the past 20 occurrences of seven consecutive positive months reveals varied results. The data includes forward 12-month returns, noting that after such a streak, the S&P 500 exhibited an upward movement 70% of the time. However, the average return was a modest 7.2%, with a median of just 5.7%.
Return Data Summary
| Date | Forward 12-Month Return |
|---|---|
| 1/31/1929 | -11.5% |
| 10/31/1935 | 38.1% |
| 11/30/1936 | -35.7% |
| 6/30/1943 | 5.1% |
| 1/31/1950 | 27.0% |
| 3/31/1954 | 35.8% |
| 9/30/1958 | 13.6% |
| 5/31/1961 | -10.4% |
| 6/30/1964 | 3.0% |
| 10/31/1980 | -4.4% |
| 2/28/1983 | 6.1% |
| 5/31/1991 | 6.5% |
| 3/31/1993 | -1.3% |
| 6/30/1995 | 23.1% |
| 5/31/1996 | 26.8% |
| 12/29/2006 | 3.5% |
| 9/30/2009 | 8.0% |
| 5/31/2013 | 18.0% |
| 10/31/2017 | 5.3% |
| 8/31/2021 | -12.6% |
| 11/28/2025 | ? |
While historical analysis indicates that the index often continues to rise after such winning streaks, the average outcome falls below the overall long-term expectations for the S&P 500.
Market Expectations Moving Forward
The historical data suggests that investors can anticipate lower-than-average returns following a lengthy winning period. After a successful streak, a phase of underperformance is statistically likely.
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