Looking at 2025, as of September 27, with only two trading days left in the month, the first three quarters of the year have seen a total gain of 12.96%, with 2.84% of that gain coming from September alone.
October 20–27: During this specific period, the market has been down 80% of the time (4 years up, 16 down), with an average decline of -1.29%. The best performance was +1.22%, and the worst was -8.23%.
November: In contrast, November has been positive 80% of the time (16 years up, 4 down), with an average gain of +3.41%. The best was a gain of +10.24%, while the worst was a decline of -1.89%.
December: December has been positive 75% of the time (15 years up, 5 down), with an average gain of +1.47%. The best performance was +5.25%, and the worst was -3.39%.
Combining November and December, the performance has been positive 90% of the time (18 years up, 2 down), with an average gain of 4.81%. The best combined performance was +13.57%, while the worst was a modest -0.45%.
The average absolute drawdown in the fourth quarter was -2.66%. The worst was -8.64%, though the period also saw potential upside gains of up to +12.00%.
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