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IBM Seasonality

Historical month-by-month and year-by-year returns

Based on 57 calendar years of monthly closes, starting 1970.

By Month

MonthAverageMedian% PositiveBestWorst
January+3.6%+3.1%61%+31.8%10.8%
February0.9%0.4%42%+14.5%21.7%
March+0.4%+0.7%56%+15.6%14.8%
April+1.2%+0.1%51%+19.7%19.5%
May+0.4%0.5%46%+28.9%9.5%
June0.2%1.3%42%+13.8%10.5%
July+1.4%+1.6%58%+17.2%20.5%
August0.3%0.5%48%+17.6%15.0%
September0.5%0.1%48%+15.9%22.6%
October0.1%0.5%48%+35.4%23.7%
November+2.4%+1.9%63%+23.5%12.2%
December+0.6%+2.1%55%+14.1%26.2%

By Calendar Year

YearReturn
2025+34.7%
2024+34.4%
2023+16.1%
2022+5.4%
2021+11.1%
20206.1%
2019+17.9%
201825.9%
20177.6%
2016+20.6%
201514.2%
201414.5%
20132.1%
2012+4.2%
2011+25.3%
2010+12.1%
2009+55.5%
200822.1%
2007+11.3%
2006+18.2%
200516.6%
2004+6.4%
2003+19.6%
200235.9%
2001+42.3%
200021.2%
1999+17.0%
1998+76.2%
1997+38.1%
1996+65.8%
1995+24.3%
1994+30.1%
1993+12.2%
199243.4%
199121.2%
1990+20.1%
198922.8%
1988+5.5%
19873.7%
198622.8%
1985+26.3%
1984+0.9%
1983+26.8%
1982+69.2%
198116.2%
1980+5.4%
197913.7%
1978+9.1%
19772.0%
1976+24.5%
1975+33.5%
197431.9%
197323.3%
1972+19.5%
1971+5.9%
19705.2%

These are historical patterns, not a forecast — past calendar-month performance does not predict future returns.