A Strong Start: S&P 500's January Gain Hints at a Bullish 2026, Historical Trends Suggest
The S&P 500's 1.4% rise in January 2026 aligns with a decades-old market indicator, the 'January Barometer,' which historically signals strong full-year performance. Analysis of the past 40 years shows an 80% probability of gains through December following a positive January.