Ticker League

Aon (AON) seasonality heatmap

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

2026

Jan-0.9%
Feb-3.8%
Mar-3.8%
Apr-3.7%
May+1.7%
Jun+6.1%
Jul
Aug
Sep
Oct
Nov
Dec

2025

Jan+3.2%
Feb+10.5%
Mar-2.5%
Apr-11.1%
May+5.1%
Jun-4.1%
Jul-0.3%
Aug+3.4%
Sep-2.8%
Oct-4.5%
Nov+4.1%
Dec-0.3%

2024

Jan+2.8%
Feb+5.9%
Mar+5.6%
Apr-15.3%
May-0.1%
Jun+4.2%
Jul+11.9%
Aug+4.8%
Sep+0.7%
Oct+6.0%
Nov+6.9%
Dec-8.3%

2023

Jan+6.4%
Feb-4.6%
Mar+3.7%
Apr+3.3%
May-5.2%
Jun+12.0%
Jul-7.6%
Aug+4.7%
Sep-2.7%
Oct-4.4%
Nov+6.2%
Dec-11.4%

2022

Jan-7.9%
Feb+5.7%
Mar+11.5%
Apr-11.4%
May-4.3%
Jun-2.2%
Jul+8.1%
Aug-4.0%
Sep-4.1%
Oct+5.3%
Nov+9.5%
Dec-2.6%

2021

Jan-3.7%
Feb+12.1%
Mar+1.1%
Apr+9.5%
May+0.8%
Jun-5.8%
Jul+9.1%
Aug+10.3%
Sep-0.4%
Oct+12.1%
Nov-7.5%
Dec+1.6%

2020

Jan+6.0%
Feb-5.6%
Mar-20.7%
Apr+4.9%
May+14.1%
Jun-2.2%
Jul+6.8%
Aug-2.6%
Sep+3.2%
Oct-10.6%
Nov+11.3%
Dec+3.1%

2019

Jan+7.8%
Feb+9.8%
Mar-0.5%
Apr+5.8%
May-0.0%
Jun+7.2%
Jul-1.7%
Aug+3.0%
Sep-0.7%
Oct+0.0%
Nov+5.4%
Dec+2.3%

2018

Jan+6.4%
Feb-1.3%
Mar+0.0%
Apr+1.8%
May-1.8%
Jun-1.9%
Jul+4.7%
Aug+1.7%
Sep+5.6%
Oct+1.8%
Nov+5.7%
Dec-12.0%

2017

Jan+1.3%
Feb+2.6%
Mar+2.6%
Apr+1.3%
May+9.2%
Jun+1.6%
Jul+4.2%
Aug+0.7%
Sep+5.0%
Oct-1.6%
Nov-2.2%
Dec-4.4%

2016

Jan-4.4%
Feb+8.5%
Mar+9.6%
Apr+1.0%
May+3.9%
Jun-0.0%
Jul-1.7%
Aug+4.0%
Sep+1.0%
Oct-1.2%
Nov+2.9%
Dec-2.2%

2015

Jan-4.8%
Feb+11.5%
Mar-4.2%
Apr+0.4%
May+5.2%
Jun-1.5%
Jul+1.4%
Aug-7.3%
Sep-5.2%
Oct+5.6%
Nov+1.5%
Dec-2.7%

2014

Jan-3.9%
Feb+6.4%
Mar-1.5%
Apr+1.0%
May+6.0%
Jun+0.2%
Jul-6.1%
Aug+3.3%
Sep+0.6%
Oct-1.6%
Nov+7.5%
Dec+2.5%

2013

Jan+4.1%
Feb+5.8%
Mar+0.7%
Apr-1.6%
May+5.5%
Jun+1.1%
Jul+5.2%
Aug-1.7%
Sep+12.1%
Oct+6.5%
Nov+3.2%
Dec+2.8%

2012

Jan+3.8%
Feb-3.4%
Mar+4.8%
Apr+5.9%
May-10.2%
Jun+0.6%
Jul+5.5%
Aug+5.6%
Sep+0.6%
Oct+3.5%
Nov+5.3%
Dec-2.1%

2011

Jan-0.3%
Feb+15.1%
Mar+0.6%
Apr-1.2%
May-0.0%
Jun-1.6%
Jul-5.9%
Aug-2.9%
Sep-10.2%
Oct+11.4%
Nov-1.4%
Dec+1.8%

2010

Jan+1.9%
Feb+5.2%
Mar+4.3%
Apr-0.2%
May-7.0%
Jun-6.0%
Jul+1.9%
Aug-3.8%
Sep+7.9%
Oct+2.0%
Nov+0.9%
Dec+14.7%

2009

Jan-18.6%
Feb+3.2%
Mar+6.8%
Apr+3.8%
May-14.7%
Jun+5.2%
Jul+4.6%
Aug+5.9%
Sep-2.6%
Oct-5.0%
Nov+0.6%
Dec-1.0%

2008

Jan-8.8%
Feb-4.0%
Mar-3.4%
Apr+13.3%
May+4.0%
Jun-2.7%
Jul+0.1%
Aug+3.7%
Sep-5.3%
Oct-5.5%
Nov+7.1%
Dec+0.8%

2007

Jan+1.9%
Feb+4.9%
Mar+0.9%
Apr+2.5%
May+10.8%
Jun-0.7%
Jul-5.7%
Aug+8.2%
Sep+3.4%
Oct+1.5%
Nov+10.3%
Dec-4.6%

2006

Jan-4.4%
Feb+15.7%
Mar+4.8%
Apr+1.3%
May-14.9%
Jun-2.3%
Jul-1.3%
Aug+1.0%
Sep-2.0%
Oct+3.2%
Nov+2.6%
Dec-1.0%

2005

Jan-4.7%
Feb+8.5%
Mar-6.8%
Apr-8.1%
May+19.6%
Jun+0.4%
Jul+2.2%
Aug+17.6%
Sep+7.3%
Oct+6.0%
Nov+7.6%
Dec-1.3%

2004

Jan+2.6%
Feb+7.4%
Mar+6.4%
Apr-6.1%
May+6.1%
Jun+3.0%
Jul-6.6%
Aug-1.9%
Sep+10.7%
Oct-28.5%
Nov+3.5%
Dec+13.0%

2003

Jan+0.2%
Feb+3.7%
Mar+6.3%
Apr+7.9%
May+15.8%
Jun-6.1%
Jul-0.2%
Aug-7.1%
Sep-6.0%
Oct+5.7%
Nov+0.2%
Dec+9.1%

2002

Jan-6.2%
Feb+4.7%
Mar+1.1%
Apr+2.7%
May-6.5%
Jun-11.8%
Jul-18.7%
Aug-16.8%
Sep+3.7%
Oct-10.5%
Nov+0.3%
Dec+3.6%

2001

Jan+2.6%
Feb-1.9%
Mar+3.6%
Apr-6.4%
May+6.0%
Jun+0.0%
Jul+1.9%
Aug+4.8%
Sep+13.1%
Oct-8.9%
Nov-5.8%
Dec-0.9%

2000

Jan-35.3%
Feb-18.0%
Mar+53.1%
Apr-15.4%
May+29.8%
Jun-11.6%
Jul+16.6%
Aug+3.6%
Sep+5.2%
Oct+6.1%
Nov-25.0%
Dec+10.3%

1999

Jan-8.4%
Feb+16.8%
Mar+7.3%
Apr+8.8%
May-5.8%
Jun-4.1%
Jul-8.7%
Aug-10.9%
Sep-11.4%
Oct+20.8%
Nov+0.5%
Dec+12.1%

1998

Jan-4.8%
Feb+7.7%
Mar+8.2%
Apr-0.4%
May-0.2%
Jun+9.6%
Jul-3.2%
Aug-7.7%
Sep+3.2%
Oct-3.4%
Nov-7.0%
Dec-3.9%

1997

Jan+4.0%
Feb-1.4%
Mar-3.4%
Apr+9.2%
May+10.0%
Jun+6.1%
Jul+8.2%
Aug-8.6%
Sep+3.6%
Oct+2.7%
Nov-2.0%
Dec+10.9%

1996

Jan+9.0%
Feb-3.7%
Mar-0.5%
Apr+4.3%
May-6.1%
Jun+0.7%
Jul-3.5%
Aug+3.9%
Sep+7.4%
Oct+7.1%
Nov+5.4%
Dec+2.0%

1995

Jan+2.8%
Feb+6.7%
Mar+5.0%
Apr+1.9%
May-1.0%
Jun+2.0%
Jul+2.9%
Aug+2.7%
Sep+4.8%
Oct+1.4%
Nov+14.6%
Dec+5.8%

1994

Jan+1.3%
Feb+2.6%
Mar-3.7%
Apr-2.9%
May+7.7%
Jun+2.3%
Jul-0.9%
Aug+3.0%
Sep-2.5%
Oct-5.8%
Nov+1.6%
Dec+1.2%

1993

Jan-4.9%
Feb+0.7%
Mar+10.3%
Apr-8.5%
May+1.6%
Jun+1.9%
Jul+2.7%
Aug+2.6%
Sep+0.4%
Oct-5.9%
Nov-4.8%
Dec-2.2%

1992

Jan+6.8%
Feb+2.1%
Mar-4.4%
Apr+9.3%
May-3.5%
Jun+7.4%
Jul+2.3%
Aug-3.4%
Sep+8.3%
Oct+1.6%
Nov+2.8%
Dec+7.1%

1991

Jan-4.5%
Feb+6.1%
Mar+6.0%
Apr+0.0%
May+12.1%
Jun-7.7%
Jul+2.0%
Aug-0.7%
Sep-2.3%
Oct+2.9%
Nov-2.0%
Dec+7.3%

1990

Jan-12.0%
Feb+1.7%
Mar+0.2%
Apr-6.9%
May+13.6%
Jun-4.5%
Jul-2.3%
Aug-3.3%
Sep-12.1%
Oct+3.7%
Nov+9.6%
Dec+0.6%

1989

Jan+1.8%
Feb+0.5%
Mar+5.5%
Apr+7.1%
May+7.3%
Jun+6.8%
Jul+0.2%
Aug-3.1%
Sep-1.8%
Oct+4.4%
Nov+9.7%
Dec+8.6%

1988

Jan+1.6%
Feb+13.9%
Mar-4.3%
Apr+1.8%
May-0.9%
Jun+5.9%
Jul+3.9%
Aug+1.3%
Sep-0.5%
Oct+5.6%
Nov-3.3%
Dec+1.8%

1987

Jan+12.2%
Feb-1.6%
Mar-6.2%
Apr-6.9%
May-0.9%
Jun+4.7%
Jul+7.8%
Aug+7.2%
Sep-4.1%
Oct-17.0%
Nov+1.0%
Dec-2.3%

1986

Jan+4.1%
Feb+12.5%
Mar+4.6%
Apr-3.9%
May-1.1%
Jun+2.4%
Jul-8.8%
Aug+7.6%
Sep-7.8%
Oct+4.4%
Nov-1.7%
Dec-4.3%

1985

Jan+6.0%
Feb+8.9%
Mar-0.7%
Apr+1.5%
May+7.7%
Jun+1.0%
Jul-2.0%
Aug-6.2%
Sep-6.3%
Oct+7.5%
Nov+13.9%
Dec+1.6%

1984

Jan-13.8%
Feb-6.1%
Mar-2.5%
Apr+6.2%
May-12.6%
Jun+2.2%
Jul-7.1%
Aug+19.9%
Sep+6.3%
Oct+6.4%
Nov-6.0%
Dec+6.9%

1983

Jan+4.7%
Feb+6.8%
Mar+5.3%
Apr+6.5%
May-3.3%
Jun+0.0%
Jul-10.7%
Aug+13.1%
Sep+5.3%
Oct+0.0%
Nov+8.7%
Dec+3.8%

1982

Jan-6.1%
Feb-10.1%
Mar+4.0%
Apr-1.6%
May+2.4%
Jun-13.8%
Jul+14.3%
Aug+3.9%
Sep+0.0%
Oct+20.3%
Nov+6.3%
Dec-0.6%

1981

Jan+0.0%
Feb-0.9%
Mar+22.4%
Apr-2.3%
May+0.0%
Jun+1.6%
Jul-0.8%
Aug-3.9%
Sep+2.4%
Oct+2.4%
Nov+6.9%
Dec+5.8%

1980

Jan
Feb
Mar
Apr
May
Jun
Jul+2.6%
Aug-1.7%
Sep-0.8%
Oct-4.3%
Nov-3.6%
Dec+0.0%

Avg

Jan-1.1%
Feb+3.6%
Mar+3.0%
Apr+0.2%
May+2.3%
Jun-0.0%
Jul+0.6%
Aug+1.2%
Sep+0.7%
Oct+1.1%
Nov+2.4%
Dec+1.6%

Median

Jan+1.3%
Feb+4.8%
Mar+1.9%
Apr+1.1%
May+1.2%
Jun+0.4%
Jul+0.8%
Aug+2.2%
Sep+0.5%
Oct+2.2%
Nov+2.9%
Dec+1.4%

Last 5Y Avg

Jan+0.7%
Feb+2.7%
Mar+2.9%
Apr-7.6%
May-0.6%
Jun+0.8%
Jul+4.3%
Aug+3.8%
Sep-1.9%
Oct+2.9%
Nov+3.8%
Dec-4.2%

Std Dev (σ)

Jan8.1%
Feb7.1%
Mar9.9%
Apr6.6%
May8.8%
Jun5.4%
Jul6.7%
Aug6.9%
Sep5.9%
Oct8.4%
Nov6.9%
Dec5.9%

Consistency (μ/σ)

Jan-0.14
Feb0.51
Mar0.30
Apr0.03
May0.26
Jun-0.00
Jul0.09
Aug0.17
Sep0.11
Oct0.13
Nov0.35
Dec0.27

Win Rate (%)

Jan54%
Feb70%
Mar65%
Apr57%
May52%
Jun53%
Jul54%
Aug59%
Sep52%
Oct63%
Nov72%
Dec57%

Winning / Losing Months

Jan2521
Feb3214
Mar3016
Apr2620
May2422
Jun2421
Jul2521
Aug2719
Sep2422
Oct2917
Nov3313
Dec2620

Longest Win / Loss Streak

Jan53
Feb82
Mar72
Apr83
May54
Jun75
Jul34
Aug54
Sep47
Oct52
Nov92
Dec54

Best

Jan+12.2%1987
Feb+16.8%1999
Mar+53.1%2000
Apr+13.3%2008
May+29.8%2000
Jun+12.0%2023
Jul+16.6%2000
Aug+19.9%1984
Sep+13.1%2001
Oct+20.8%1999
Nov+14.6%1995
Dec+14.7%2010

Worst

Jan-35.3%2000
Feb-18.0%2000
Mar-20.7%2020
Apr-15.4%2000
May-14.9%2006
Jun-13.8%1982
Jul-18.7%2002
Aug-16.8%2002
Sep-12.1%1990
Oct-28.5%2004
Nov-25.0%2000
Dec-12.0%2018
−35.3%+53.1%

Frequently asked questions

Data & methodology