Berkshire Hathaway: seasonality, event history and insights
In October, Berkshire Hathaway has averaged +1.55% and risen in 57% of 30 years (1996 to 2025). We rate the October pattern as no clear pattern.
Last close 505.54 on October 6, 2026: +0.25% on the day, +0.57% this year, +1.52% so far in October.
Month by month
| Month | Average | Median | Up years | Last 10 years | Best | Worst | Years | Pattern |
|---|---|---|---|---|---|---|---|---|
| January | +0.40% | +0.35% | 53% | +1.90% | +16.30% | -10.05% | 30 | no clear pattern |
| February | +1.39% | +2.80% | 67% | +1.86% | +10.91% | -14.22% | 30 | moderate |
| March | +2.13% | +1.64% | 57% | +0.04% | +26.39% | -11.39% | 30 | weak |
| April | +1.42% | +1.15% | 57% | +0.54% | +9.12% | -8.52% | 30 | weak |
| May | -0.40% | -0.26% | 43% | -1.09% | +13.69% | -8.90% | 30 | no clear pattern |
| June | -0.22% | -0.94% | 39% | -0.73% | +12.96% | -13.60% | 31 | no clear pattern |
| July | +0.99% | +0.06% | 52% | +3.60% | +10.10% | -10.37% | 31 | no clear pattern |
| August | +1.25% | +1.91% | 61% | +3.15% | +11.37% | -14.26% | 31 | weak |
| September | +0.42% | -0.05% | 48% | -1.30% | +12.63% | -7.34% | 31 | no clear pattern |
| October | +1.55% | +1.21% | 57% | +0.08% | +12.61% | -12.63% | 30 | no clear pattern |
| November | +2.72% | +2.95% | 77% | +6.02% | +13.38% | -10.77% | 30 | strong |
| December | +0.73% | +0.90% | 63% | -0.04% | +8.28% | -8.15% | 30 | no clear pattern |
What drives Berkshire Hathaway
- Insurance float, a large equity portfolio and wholly owned businesses across railways, energy and retail.
- Large cash holdings make its earnings sensitive to short-term interest rates.
Sell in May for Berkshire Hathaway
From 1997 to 2025, the November to April half averaged +9.32% and the May to October half +3.05%. The winter half did better in 69% of 29 years. Compare all markets.
Year by year
Latest insights on Berkshire Hathaway
Questions
What is the best month for Berkshire Hathaway?
Since 1996, November has had the highest average move for Berkshire Hathaway at +2.72%, rising in 77% of 30 years. November has the highest share of positive years (77%).
What is the worst month for Berkshire Hathaway?
May has had the weakest average move at -0.40%, rising in 43% of 30 years.
How does Berkshire Hathaway usually do in October?
Berkshire Hathaway has averaged +1.55% in October (median +1.21%), rising in 57% of 30 years. We rate the pattern as no clear pattern.
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