Volatility by month
October has had the largest average absolute move for the S&P 500 at 4.28%, and September and October hold most of the monthly drops of 10% or more.
| Month | Average absolute move | Months down 10% or more | Years |
|---|---|---|---|
| January | 3.97% | 0 | 99 |
| February | 3.12% | 2 | 99 |
| March | 3.55% | 5 | 99 |
| April | 4.13% | 1 | 99 |
| May | 3.83% | 3 | 99 |
| June | 3.62% | 1 | 99 |
| July | 4.13% | 1 | 99 |
| August | 3.83% | 1 | 99 |
| September | 3.96% | 7 | 99 |
| October | 4.28% | 5 | 98 |
| November | 4.05% | 4 | 98 |
| December | 2.98% | 1 | 98 |
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