Ticker League

W. R. Berkley (WRB) seasonality heatmap

Returns across monthly, quarterly, and yearly periods. Cell color encodes signed magnitude; the scale auto-fits each table.

2026

Jan-2.2%
Feb+4.7%
Mar-7.6%
Apr+0.8%
May-4.9%
Jun+7.4%
Jul
Aug
Sep
Oct
Nov
Dec

2025

Jan+0.5%
Feb+7.2%
Mar+13.0%
Apr+0.7%
May+4.2%
Jun-0.8%
Jul-6.3%
Aug+4.2%
Sep+7.0%
Oct-6.9%
Nov+8.9%
Dec-8.3%

2024

Jan+15.8%
Feb+2.1%
Mar+5.9%
Apr-13.0%
May+5.3%
Jun-2.3%
Jul+5.2%
Aug+8.3%
Sep-4.4%
Oct+0.8%
Nov+12.9%
Dec-8.5%

2023

Jan-2.7%
Feb-5.6%
Mar-5.8%
Apr-5.4%
May-5.5%
Jun+7.2%
Jul+3.6%
Aug+0.3%
Sep+3.6%
Oct+6.2%
Nov+7.6%
Dec-1.7%

2022

Jan+2.5%
Feb+6.8%
Mar+10.8%
Apr-0.1%
May+7.0%
Jun-3.1%
Jul-8.4%
Aug+3.6%
Sep-0.2%
Oct+15.2%
Nov+2.5%
Dec-4.7%

2021

Jan-6.5%
Feb+11.6%
Mar+8.9%
Apr+5.8%
May-2.2%
Jun-3.7%
Jul-1.7%
Aug+2.9%
Sep-2.7%
Oct+8.8%
Nov-3.7%
Dec+9.1%

2020

Jan+6.4%
Feb-8.7%
Mar-22.1%
Apr+3.5%
May+7.3%
Jun-1.0%
Jul+7.8%
Aug+0.5%
Sep-1.2%
Oct-1.7%
Nov+8.3%
Dec+2.2%

2019

Jan+4.0%
Feb+8.9%
Mar+1.4%
Apr+8.5%
May+1.5%
Jun+7.0%
Jul+5.2%
Aug+2.7%
Sep+1.5%
Oct-3.2%
Nov-1.5%
Dec+1.6%

2018

Jan+1.8%
Feb-6.3%
Mar+6.6%
Apr+2.6%
May+2.5%
Jun-4.5%
Jul+4.8%
Aug+3.2%
Sep+3.0%
Oct-5.0%
Nov+4.6%
Dec-6.1%

2017

Jan+1.0%
Feb+5.7%
Mar-0.5%
Apr-3.8%
May+1.5%
Jun+1.2%
Jul-0.3%
Aug-3.3%
Sep+0.2%
Oct+2.8%
Nov+1.7%
Dec+3.7%

2016

Jan-8.4%
Feb+2.6%
Mar+9.4%
Apr-0.3%
May+1.8%
Jun+5.3%
Jul-2.9%
Aug+2.0%
Sep-1.6%
Oct-1.1%
Nov+9.3%
Dec+7.7%

2015

Jan-4.4%
Feb+1.8%
Mar+1.4%
Apr-3.0%
May+0.0%
Jun+6.2%
Jul+7.3%
Aug-2.6%
Sep+0.4%
Oct+2.7%
Nov-0.2%
Dec-1.6%

2014

Jan-10.7%
Feb+6.5%
Mar+1.1%
Apr+6.3%
May+0.8%
Jun+4.1%
Jul-3.7%
Aug+8.4%
Sep-1.0%
Oct+7.9%
Nov+1.6%
Dec+0.1%

2013

Jan+9.0%
Feb+0.9%
Mar+7.0%
Apr-2.1%
May-5.7%
Jun+0.0%
Jul+3.6%
Aug-2.9%
Sep+4.5%
Oct+2.5%
Nov-0.1%
Dec-0.9%

2012

Jan-0.4%
Feb+4.4%
Mar+1.3%
Apr+4.3%
May+1.7%
Jun+1.8%
Jul-6.0%
Aug+2.1%
Sep+0.6%
Oct+3.6%
Nov+2.6%
Dec-2.6%

2011

Jan+3.2%
Feb+5.9%
Mar+7.7%
Apr+1.3%
May+1.6%
Jun-1.8%
Jul-5.1%
Aug+0.3%
Sep-3.6%
Oct+17.2%
Nov-2.0%
Dec+1.1%

2010

Jan-1.1%
Feb+5.8%
Mar+1.6%
Apr+3.4%
May+1.0%
Jun-2.6%
Jul+1.9%
Aug-2.4%
Sep+3.0%
Oct+1.5%
Nov-2.9%
Dec+2.8%

2009

Jan-14.5%
Feb-21.4%
Mar+8.4%
Apr+6.1%
May-9.3%
Jun-0.9%
Jul+8.1%
Aug+10.1%
Sep-0.9%
Oct-2.2%
Nov+0.0%
Dec+0.0%

2008

Jan+1.3%
Feb-4.7%
Mar-3.6%
Apr-7.2%
May+5.6%
Jun-10.7%
Jul-2.2%
Aug-0.4%
Sep+0.4%
Oct+11.4%
Nov+8.3%
Dec+9.2%

2007

Jan-4.2%
Feb-1.5%
Mar+1.9%
Apr-1.9%
May+1.3%
Jun-1.0%
Jul-9.5%
Aug+1.5%
Sep-0.6%
Oct+1.6%
Nov+1.6%
Dec-2.3%

2006

Jan+3.6%
Feb+17.3%
Mar+0.4%
Apr-3.4%
May-8.2%
Jun-0.6%
Jul+5.5%
Aug-2.8%
Sep+1.4%
Oct+4.1%
Nov-4.8%
Dec-1.5%

2005

Jan+1.2%
Feb+7.6%
Mar-3.2%
Apr-1.8%
May+9.2%
Jun+0.8%
Jul+4.9%
Aug-5.2%
Sep+11.5%
Oct+10.6%
Nov+6.8%
Dec+2.3%

2004

Jan+10.1%
Feb+8.0%
Mar-4.0%
Apr+1.7%
May+2.7%
Jun+3.4%
Jul-4.6%
Aug-1.3%
Sep+4.3%
Oct+1.6%
Nov+5.9%
Dec+4.3%

2003

Jan-0.8%
Feb+3.4%
Mar+5.7%
Apr+8.5%
May+6.1%
Jun+7.4%
Jul-2.8%
Aug-3.2%
Sep+3.7%
Oct+0.3%
Nov-0.6%
Dec+2.6%

2002

Jan-5.6%
Feb+8.0%
Mar+5.1%
Apr+5.7%
May-2.5%
Jun-6.8%
Jul-3.7%
Aug-4.3%
Sep+1.0%
Oct+9.3%
Nov+6.3%
Dec+0.4%

2001

Jan-25.4%
Feb+21.7%
Mar+6.0%
Apr-10.1%
May+7.5%
Jun-5.2%
Jul+1.2%
Aug-8.5%
Sep+26.5%
Oct+10.5%
Nov+0.5%
Dec+0.5%

2000

Jan-16.4%
Feb-7.8%
Mar+44.8%
Apr-8.1%
May+4.0%
Jun-14.2%
Jul+29.1%
Aug+8.8%
Sep+31.1%
Oct-1.5%
Nov+6.0%
Dec+31.2%

1999

Jan-23.9%
Feb+10.8%
Mar-14.4%
Apr+12.6%
May-7.4%
Jun-1.5%
Jul-3.4%
Aug-5.7%
Sep+2.1%
Oct-0.7%
Nov-6.7%
Dec-1.8%

1998

Jan-6.1%
Feb+10.5%
Mar+4.1%
Apr-1.1%
May+0.0%
Jun-14.4%
Jul-16.1%
Aug-5.6%
Sep-5.1%
Oct+0.9%
Nov+11.5%
Dec+1.6%

1997

Jan-4.8%
Feb+6.8%
Mar-0.8%
Apr-3.2%
May+5.0%
Jun+14.2%
Jul-2.1%
Aug-3.5%
Sep+16.8%
Oct-4.4%
Nov+1.3%
Dec+5.2%

1996

Jan-7.0%
Feb-9.2%
Mar+1.8%
Apr-6.3%
May+1.0%
Jun-3.8%
Jul-2.1%
Aug+12.2%
Sep+0.9%
Oct+13.4%
Nov+0.8%
Dec-3.1%

1995

Jan-0.7%
Feb-4.1%
Mar+3.2%
Apr+2.1%
May-2.1%
Jun-2.5%
Jul+7.9%
Aug+11.2%
Sep+5.9%
Oct-4.6%
Nov+4.9%
Dec+19.4%

1994

Jan+1.5%
Feb+0.0%
Mar-1.1%
Apr+3.6%
May+6.3%
Jun+0.3%
Jul-2.6%
Aug-2.7%
Sep-1.8%
Oct+0.7%
Nov-8.5%
Dec+13.6%

1993

Jan+2.7%
Feb+5.9%
Mar+0.9%
Apr-8.6%
May-4.2%
Jun-5.3%
Jul+9.2%
Aug+7.4%
Sep-6.3%
Oct-9.6%
Nov-6.7%
Dec-1.9%

1992

Jan+9.2%
Feb+2.3%
Mar-2.7%
Apr-3.1%
May+2.4%
Jun+1.8%
Jul+5.4%
Aug+0.0%
Sep+26.4%
Oct+4.9%
Nov-4.7%
Dec-2.6%

1991

Jan-0.7%
Feb+19.7%
Mar-1.5%
Apr+2.6%
May+4.3%
Jun-5.5%
Jul-5.2%
Aug-5.5%
Sep-8.8%
Oct+15.3%
Nov+0.0%
Dec+10.5%

1990

Jan-12.1%
Feb+5.6%
Mar+1.0%
Apr+9.0%
May+3.7%
Jun-4.3%
Jul+0.0%
Aug-17.8%
Sep-4.9%
Oct+1.2%
Nov+14.4%
Dec+2.3%

1989

Jan+7.6%
Feb-3.2%
Mar-4.6%
Apr+14.5%
May-6.7%
Jun+1.9%
Jul+8.7%
Aug+12.5%
Sep+4.2%
Oct+7.6%
Nov+6.2%
Dec-12.3%

1988

Jan+3.1%
Feb+15.2%
Mar-15.8%
Apr+4.6%
May-1.0%
Jun+4.4%
Jul+0.0%
Aug+5.3%
Sep+2.6%
Oct+5.4%
Nov+2.6%
Dec-1.4%

1987

Jan+5.7%
Feb+15.3%
Mar+4.7%
Apr-15.4%
May-4.4%
Jun-2.4%
Jul-1.0%
Aug+2.9%
Sep-2.4%
Oct-15.4%
Nov-1.1%
Dec+10.7%

1986

Jan+13.0%
Feb+19.2%
Mar+16.7%
Apr-12.9%
May+21.2%
Jun+4.9%
Jul-15.6%
Aug+12.6%
Sep-19.6%
Oct-12.3%
Nov-6.5%
Dec+5.2%

1985

Jan-8.5%
Feb+13.0%
Mar-1.6%
Apr-3.3%
May+6.0%
Jun-2.4%
Jul+19.2%
Aug+23.1%
Sep-8.5%
Oct-3.1%
Nov+39.7%
Dec+26.6%

1984

Jan+0.0%
Feb-3.7%
Mar+0.0%
Apr+0.0%
May+0.0%
Jun+0.0%
Jul-1.9%
Aug-2.0%
Sep+25.0%
Oct-5.6%
Nov-0.8%
Dec+0.9%

1983

Jan+0.0%
Feb+1.1%
Mar+5.6%
Apr+27.7%
May-5.0%
Jun-5.3%
Jul+11.1%
Aug-1.7%
Sep-1.7%
Oct+3.4%
Nov-11.7%
Dec+1.9%

1982

Jan+20.2%
Feb-5.6%
Mar-1.7%
Apr+1.7%
May-15.3%
Jun+0.0%
Jul-8.0%
Aug-13.0%
Sep+27.5%
Oct-9.8%
Nov+0.0%
Dec-4.4%

1981

Jan+21.3%
Feb+10.5%
Mar+3.2%
Apr+1.5%
May+4.5%
Jun-5.8%
Jul+10.8%
Aug-4.2%
Sep-17.4%
Oct-1.8%
Nov+5.4%
Dec-11.9%

1980

Jan+22.2%
Feb+3.0%
Mar-25.0%
Apr+0.0%
May+9.8%
Jun-1.8%
Jul+1.8%
Aug+1.8%
Sep-3.5%
Oct-5.5%
Nov+0.0%
Dec-9.6%

1979

Jan+0.0%
Feb-29.6%
Mar+1.8%
Apr-8.6%
May-1.9%
Jun+7.7%
Jul+5.4%
Aug-10.2%
Sep+13.2%
Oct+0.0%
Nov-5.0%
Dec-5.3%

1978

Jan-7.7%
Feb+2.8%
Mar+0.0%
Apr+8.1%
May+16.2%
Jun-3.2%
Jul+4.4%
Aug+23.4%
Sep+22.4%
Oct+1.4%
Nov-2.8%
Dec+15.7%

1977

Jan+8.6%
Feb+7.9%
Mar-17.1%
Apr+17.7%
May+37.5%
Jun-3.6%
Jul+24.5%
Aug+3.0%
Sep-1.5%
Oct-1.5%
Nov+6.1%
Dec+11.4%

1976

Jan+12.5%
Feb-7.4%
Mar-4.0%
Apr+0.0%
May+16.7%
Jun+7.1%
Jul-13.3%
Aug+0.0%
Sep+3.8%
Oct+3.7%
Nov-10.7%
Dec+40.0%

1975

Jan-4.0%
Feb+12.5%
Mar+3.7%
Apr-3.6%
May+29.6%
Jun+2.9%
Jul-2.8%
Aug-5.7%
Sep-3.0%
Oct-12.5%
Nov+0.0%
Dec-14.3%

1974

Jan+9.1%
Feb+10.4%
Mar+47.2%
Apr-28.2%
May-21.4%
Jun-25.0%
Jul+9.1%
Aug-27.8%
Sep-15.4%
Oct+50.0%
Nov-24.2%
Dec+0.0%

1973

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov-36.7%
Dec+15.8%

Avg

Jan+0.3%
Feb+3.7%
Mar+2.0%
Apr+0.2%
May+2.4%
Jun-1.1%
Jul+1.4%
Aug+0.6%
Sep+2.7%
Oct+2.3%
Nov+0.9%
Dec+2.9%

Median

Jan+0.0%
Feb+5.6%
Mar+1.4%
Apr+0.0%
May+1.6%
Jun-1.0%
Jul+0.0%
Aug+0.1%
Sep+0.5%
Oct+1.3%
Nov+0.5%
Dec+0.9%

Last 5Y Avg

Jan+2.8%
Feb+3.0%
Mar+3.3%
Apr-3.4%
May+1.2%
Jun-0.6%
Jul-1.5%
Aug+3.9%
Sep+0.7%
Oct+4.8%
Nov+5.6%
Dec-2.8%

Std Dev (σ)

Jan9.8%
Feb9.5%
Mar11.8%
Apr8.6%
May9.5%
Jun6.3%
Jul8.7%
Aug8.7%
Sep10.8%
Oct9.8%
Nov10.0%
Dec10.3%

Consistency (μ/σ)

Jan0.04
Feb0.38
Mar0.17
Apr0.02
May0.26
Jun-0.17
Jul0.17
Aug0.07
Sep0.25
Oct0.23
Nov0.09
Dec0.28

Win Rate (%)

Jan49%
Feb72%
Mar60%
Apr49%
May62%
Jun37%
Jul48%
Aug50%
Sep56%
Oct60%
Nov51%
Dec57%

Winning / Losing Months

Jan2627
Feb3815
Mar3221
Apr2627
May3320
Jun1933
Jul2527
Aug2626
Sep2923
Oct3121
Nov2726
Dec3023

Longest Win / Loss Streak

Jan49
Feb83
Mar83
Apr44
May53
Jun46
Jul54
Aug86
Sep83
Oct84
Nov44
Dec64

Best

Jan+22.2%1980
Feb+21.7%2001
Mar+47.2%1974
Apr+27.7%1983
May+37.5%1977
Jun+14.2%1997
Jul+29.1%2000
Aug+23.4%1978
Sep+31.1%2000
Oct+50.0%1974
Nov+39.7%1985
Dec+40.0%1976

Worst

Jan-25.4%2001
Feb-29.6%1979
Mar-25.0%1980
Apr-28.2%1974
May-21.4%1974
Jun-25.0%1974
Jul-16.1%1998
Aug-27.8%1974
Sep-19.6%1986
Oct-15.4%1987
Nov-36.7%1973
Dec-14.3%1975
−36.7%+50.0%

Frequently asked questions

Data & methodology