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Regeneron Seasonality

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

Based on 36 calendar years of monthly closes, starting 1991.

By Month

MonthAverageMedian% PositiveBestWorst
January+3.7%+1.0%51%+120.8%39.5%
February+8.7%2.1%43%+358.9%21.3%
March4.3%0.4%46%+23.9%59.0%
April+1.4%1.1%46%+39.8%18.8%
May+5.3%+2.2%61%+117.1%28.7%
June+0.7%0.7%44%+46.9%29.4%
July+5.7%+3.6%67%+51.6%22.5%
August+2.3%+4.1%57%+30.7%34.0%
September+2.3%0.7%46%+29.1%26.2%
October0.1%4.7%40%+31.8%21.7%
November+4.6%+0.7%54%+60.0%19.9%
December+4.3%0.3%46%+67.2%29.4%

By Calendar Year

YearReturn
2025+8.4%
202418.9%
2023+21.7%
2022+14.2%
2021+30.7%
2020+28.7%
2019+0.5%
20180.7%
2017+2.4%
201632.4%
2015+32.3%
2014+49.1%
2013+60.9%
2012+208.6%
2011+68.8%
2010+35.8%
2009+31.7%
200824.0%
2007+20.3%
2006+26.2%
2005+72.6%
200437.4%
200320.5%
200234.3%
200120.1%
2000+176.6%
1999+72.9%
199813.9%
199746.9%
1996+26.5%
1995+325.0%
199480.6%
1993+29.2%
199233.8%

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