Iron Mountain (IRM) seasonality heatmap
Returns across monthly, quarterly, and yearly periods. Cell color encodes signed magnitude; the scale auto-fits each table.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +11.1% | +17.6% | -4.9% | +23.4% | +1.8% | -0.8% | — | — | — | — | — | — |
| 2025 | -3.4% | -8.3% | -6.8% | +4.2% | +10.1% | +4.7% | -5.1% | -5.2% | +11.3% | +1.0% | -16.1% | -2.9% |
| 2024 | -3.5% | +16.5% | +2.8% | -3.3% | +4.1% | +11.9% | +14.4% | +10.4% | +5.6% | +4.1% | -0.0% | -14.5% |
| 2023 | +9.5% | -3.3% | +1.5% | +4.4% | -3.3% | +7.6% | +8.1% | +3.5% | -5.5% | -0.6% | +8.6% | +10.1% |
| 2022 | -12.2% | +7.1% | +14.1% | -3.0% | +0.3% | -8.5% | -0.4% | +8.5% | -15.5% | +13.9% | +8.5% | -7.2% |
| 2021 | +14.2% | +3.3% | +8.2% | +8.4% | +8.5% | -1.5% | +3.4% | +9.1% | -7.8% | +5.0% | -0.4% | +16.6% |
| 2020 | -0.8% | -3.8% | -19.9% | +1.6% | +6.6% | +3.6% | +8.0% | +6.8% | -9.1% | -2.7% | +5.5% | +9.5% |
| 2019 | +14.8% | -4.8% | +1.9% | -8.4% | -5.7% | +4.1% | -6.0% | +8.3% | +3.5% | +1.3% | -2.1% | +1.1% |
| 2018 | -7.1% | -10.2% | +6.3% | +3.3% | -1.9% | +7.0% | +0.3% | +2.8% | -2.8% | -11.3% | +11.0% | -2.9% |
| 2017 | +10.3% | +1.5% | -0.3% | -2.6% | +0.5% | +0.0% | +6.0% | +8.2% | +0.0% | +2.8% | +2.2% | -6.3% |
| 2016 | +2.0% | +6.7% | +17.4% | +7.7% | +0.6% | +9.9% | +3.5% | -6.8% | -1.1% | -10.1% | -2.2% | +0.0% |
| 2015 | +3.0% | -7.7% | +0.5% | -5.4% | +5.8% | -13.7% | -3.1% | -5.7% | +11.3% | -1.2% | -7.7% | -2.8% |
| 2014 | -12.9% | +3.0% | +2.2% | +3.2% | +9.5% | +14.8% | -5.5% | +7.3% | -8.1% | +10.4% | +6.1% | +3.0% |
| 2013 | +10.1% | +0.9% | +5.9% | +4.3% | -5.4% | -25.0% | +4.4% | -7.1% | +5.6% | -1.8% | +5.9% | +8.8% |
| 2012 | +0.1% | +0.8% | -6.5% | +5.5% | -6.6% | +17.1% | -2.2% | +1.9% | +4.7% | +12.7% | -8.6% | -1.0% |
| 2011 | -2.5% | +6.6% | +20.9% | +2.0% | +6.7% | +1.0% | -7.2% | +2.8% | -2.1% | -2.2% | -1.8% | +2.2% |
| 2010 | +0.4% | +13.2% | +6.1% | -8.3% | -2.5% | -8.1% | +5.4% | -14.3% | +10.5% | -2.5% | +2.0% | +13.3% |
| 2009 | -17.2% | -9.3% | +19.4% | +28.5% | -4.4% | +5.5% | +1.6% | +0.3% | -9.0% | -8.4% | -1.7% | -5.2% |
| 2008 | -7.1% | -12.5% | -12.1% | +3.9% | +9.3% | -11.6% | +9.3% | -0.3% | -15.5% | -0.6% | -10.4% | +13.8% |
| 2007 | +1.5% | -0.5% | -6.1% | +7.6% | -2.2% | -5.0% | +2.5% | +5.6% | +7.8% | +13.9% | +5.1% | +1.5% |
| 2006 | -1.3% | +4.8% | -6.8% | -3.9% | -5.5% | +1.2% | +9.6% | +0.0% | +4.8% | +0.9% | -0.6% | -4.1% |
| 2005 | -7.6% | -4.0% | +6.6% | +2.9% | -3.3% | +8.2% | +10.5% | +0.5% | +6.5% | +6.3% | +5.7% | +2.4% |
| 2004 | +5.3% | +7.8% | -0.5% | +2.0% | -2.7% | +8.9% | +0.3% | -4.5% | +9.8% | -2.4% | -8.8% | +1.2% |
| 2003 | -4.0% | +11.1% | +8.7% | +4.2% | -0.8% | -6.2% | -1.2% | +1.0% | -3.0% | +6.6% | -3.9% | +7.5% |
| 2002 | +9.6% | -0.2% | -0.7% | -2.9% | +0.5% | -0.4% | -3.7% | -6.5% | -10.1% | +12.9% | +17.3% | -0.3% |
| 2001 | +0.2% | +4.9% | -1.7% | -5.8% | +13.9% | +9.0% | -2.6% | -2.3% | -2.9% | -5.8% | +10.7% | +1.3% |
| 2000 | -15.9% | -7.7% | +11.6% | +2.9% | +4.2% | -7.0% | +3.1% | -2.6% | +8.4% | -8.7% | -1.9% | +11.9% |
| 1999 | -2.1% | -0.7% | +0.4% | +1.1% | -1.4% | -0.4% | +3.3% | -16.3% | +11.4% | +23.6% | +8.9% | +35.0% |
| 1998 | +20.5% | +3.3% | -0.5% | +13.9% | -9.9% | -10.4% | +3.5% | +5.6% | +23.9% | +14.2% | +2.3% | +3.7% |
| 1997 | -6.6% | -0.9% | -11.9% | -4.9% | +18.8% | +7.7% | -11.6% | +1.0% | -0.5% | +3.0% | -12.6% | -16.1% |
| 1996 | — | — | -4.2% | +10.5% | +11.1% | +12.1% | +10.8% | +4.6% | +21.4% | +1.8% | +1.8% | -0.9% |
| Avg | +0.3% | +1.2% | +1.7% | +3.1% | +1.8% | +1.2% | +2.0% | +0.6% | +1.8% | +2.5% | +0.8% | +2.6% |
| Median | -0.4% | +0.8% | +0.5% | +2.9% | +0.5% | +2.4% | +2.8% | +1.0% | +1.8% | +1.1% | +0.9% | +1.3% |
| Last 5Y Avg | +0.3% | +5.9% | +1.3% | +5.1% | +2.6% | +2.8% | +4.1% | +5.3% | -2.4% | +4.7% | +0.1% | +0.4% |
| Std Dev (σ) | 9.3% | 7.7% | 9.3% | 8.1% | 6.8% | 9.5% | 6.1% | 6.7% | 9.7% | 8.2% | 7.6% | 9.8% |
| Consistency (μ/σ) | 0.03 | 0.15 | 0.18 | 0.38 | 0.27 | 0.13 | 0.32 | 0.08 | 0.18 | 0.31 | 0.10 | 0.27 |
| Win Rate (%) | 50% | 53% | 55% | 68% | 55% | 57% | 63% | 60% | 53% | 57% | 50% | 57% |
| Winning / Losing Months | ▲15▼15 | ▲16▼14 | ▲17▼14 | ▲21▼10 | ▲17▼14 | ▲17▼13 | ▲19▼11 | ▲18▼12 | ▲16▼14 | ▲17▼13 | ▲15▼15 | ▲17▼13 |
| Longest Win / Loss Streak | ▲3▼2 | ▲5▼3 | ▲4▼3 | ▲4▼2 | ▲4▼5 | ▲3▼3 | ▲7▼3 | ▲8▼4 | ▲4▼4 | ▲4▼4 | ▲2▼2 | ▲4▼4 |
| Best | +20.5%in January 1998 | +17.6%in February 2026 | +20.9%in March 2011 | +28.5%in April 2009 | +18.8%in May 1997 | +17.1%in June 2012 | +14.4%in July 2024 | +10.4%in August 2024 | +23.9%in September 1998 | +23.6%in October 1999 | +17.3%in November 2002 | +35.0%in December 1999 |
| Worst | -17.2%in January 2009 | -12.5%in February 2008 | -19.9%in March 2020 | -8.4%in April 2019 | -9.9%in May 1998 | -25.0%in June 2013 | -11.6%in July 1997 | -16.3%in August 1999 | -15.5%in September 2008 | -11.3%in October 2018 | -16.1%in November 2025 | -16.1%in December 1997 |
−25.0%+35.0%
2026
Jan+11.1%
Feb+17.6%
Mar-4.9%
Apr+23.4%
May+1.8%
Jun-0.8%
Jul—
Aug—
Sep—
Oct—
Nov—
Dec—
2025
Jan-3.4%
Feb-8.3%
Mar-6.8%
Apr+4.2%
May+10.1%
Jun+4.7%
Jul-5.1%
Aug-5.2%
Sep+11.3%
Oct+1.0%
Nov-16.1%
Dec-2.9%
2024
Jan-3.5%
Feb+16.5%
Mar+2.8%
Apr-3.3%
May+4.1%
Jun+11.9%
Jul+14.4%
Aug+10.4%
Sep+5.6%
Oct+4.1%
Nov-0.0%
Dec-14.5%
2023
Jan+9.5%
Feb-3.3%
Mar+1.5%
Apr+4.4%
May-3.3%
Jun+7.6%
Jul+8.1%
Aug+3.5%
Sep-5.5%
Oct-0.6%
Nov+8.6%
Dec+10.1%
2022
Jan-12.2%
Feb+7.1%
Mar+14.1%
Apr-3.0%
May+0.3%
Jun-8.5%
Jul-0.4%
Aug+8.5%
Sep-15.5%
Oct+13.9%
Nov+8.5%
Dec-7.2%
2021
Jan+14.2%
Feb+3.3%
Mar+8.2%
Apr+8.4%
May+8.5%
Jun-1.5%
Jul+3.4%
Aug+9.1%
Sep-7.8%
Oct+5.0%
Nov-0.4%
Dec+16.6%
2020
Jan-0.8%
Feb-3.8%
Mar-19.9%
Apr+1.6%
May+6.6%
Jun+3.6%
Jul+8.0%
Aug+6.8%
Sep-9.1%
Oct-2.7%
Nov+5.5%
Dec+9.5%
2019
Jan+14.8%
Feb-4.8%
Mar+1.9%
Apr-8.4%
May-5.7%
Jun+4.1%
Jul-6.0%
Aug+8.3%
Sep+3.5%
Oct+1.3%
Nov-2.1%
Dec+1.1%
2018
Jan-7.1%
Feb-10.2%
Mar+6.3%
Apr+3.3%
May-1.9%
Jun+7.0%
Jul+0.3%
Aug+2.8%
Sep-2.8%
Oct-11.3%
Nov+11.0%
Dec-2.9%
2017
Jan+10.3%
Feb+1.5%
Mar-0.3%
Apr-2.6%
May+0.5%
Jun+0.0%
Jul+6.0%
Aug+8.2%
Sep+0.0%
Oct+2.8%
Nov+2.2%
Dec-6.3%
2016
Jan+2.0%
Feb+6.7%
Mar+17.4%
Apr+7.7%
May+0.6%
Jun+9.9%
Jul+3.5%
Aug-6.8%
Sep-1.1%
Oct-10.1%
Nov-2.2%
Dec+0.0%
2015
Jan+3.0%
Feb-7.7%
Mar+0.5%
Apr-5.4%
May+5.8%
Jun-13.7%
Jul-3.1%
Aug-5.7%
Sep+11.3%
Oct-1.2%
Nov-7.7%
Dec-2.8%
2014
Jan-12.9%
Feb+3.0%
Mar+2.2%
Apr+3.2%
May+9.5%
Jun+14.8%
Jul-5.5%
Aug+7.3%
Sep-8.1%
Oct+10.4%
Nov+6.1%
Dec+3.0%
2013
Jan+10.1%
Feb+0.9%
Mar+5.9%
Apr+4.3%
May-5.4%
Jun-25.0%
Jul+4.4%
Aug-7.1%
Sep+5.6%
Oct-1.8%
Nov+5.9%
Dec+8.8%
2012
Jan+0.1%
Feb+0.8%
Mar-6.5%
Apr+5.5%
May-6.6%
Jun+17.1%
Jul-2.2%
Aug+1.9%
Sep+4.7%
Oct+12.7%
Nov-8.6%
Dec-1.0%
2011
Jan-2.5%
Feb+6.6%
Mar+20.9%
Apr+2.0%
May+6.7%
Jun+1.0%
Jul-7.2%
Aug+2.8%
Sep-2.1%
Oct-2.2%
Nov-1.8%
Dec+2.2%
2010
Jan+0.4%
Feb+13.2%
Mar+6.1%
Apr-8.3%
May-2.5%
Jun-8.1%
Jul+5.4%
Aug-14.3%
Sep+10.5%
Oct-2.5%
Nov+2.0%
Dec+13.3%
2009
Jan-17.2%
Feb-9.3%
Mar+19.4%
Apr+28.5%
May-4.4%
Jun+5.5%
Jul+1.6%
Aug+0.3%
Sep-9.0%
Oct-8.4%
Nov-1.7%
Dec-5.2%
2008
Jan-7.1%
Feb-12.5%
Mar-12.1%
Apr+3.9%
May+9.3%
Jun-11.6%
Jul+9.3%
Aug-0.3%
Sep-15.5%
Oct-0.6%
Nov-10.4%
Dec+13.8%
2007
Jan+1.5%
Feb-0.5%
Mar-6.1%
Apr+7.6%
May-2.2%
Jun-5.0%
Jul+2.5%
Aug+5.6%
Sep+7.8%
Oct+13.9%
Nov+5.1%
Dec+1.5%
2006
Jan-1.3%
Feb+4.8%
Mar-6.8%
Apr-3.9%
May-5.5%
Jun+1.2%
Jul+9.6%
Aug+0.0%
Sep+4.8%
Oct+0.9%
Nov-0.6%
Dec-4.1%
2005
Jan-7.6%
Feb-4.0%
Mar+6.6%
Apr+2.9%
May-3.3%
Jun+8.2%
Jul+10.5%
Aug+0.5%
Sep+6.5%
Oct+6.3%
Nov+5.7%
Dec+2.4%
2004
Jan+5.3%
Feb+7.8%
Mar-0.5%
Apr+2.0%
May-2.7%
Jun+8.9%
Jul+0.3%
Aug-4.5%
Sep+9.8%
Oct-2.4%
Nov-8.8%
Dec+1.2%
2003
Jan-4.0%
Feb+11.1%
Mar+8.7%
Apr+4.2%
May-0.8%
Jun-6.2%
Jul-1.2%
Aug+1.0%
Sep-3.0%
Oct+6.6%
Nov-3.9%
Dec+7.5%
2002
Jan+9.6%
Feb-0.2%
Mar-0.7%
Apr-2.9%
May+0.5%
Jun-0.4%
Jul-3.7%
Aug-6.5%
Sep-10.1%
Oct+12.9%
Nov+17.3%
Dec-0.3%
2001
Jan+0.2%
Feb+4.9%
Mar-1.7%
Apr-5.8%
May+13.9%
Jun+9.0%
Jul-2.6%
Aug-2.3%
Sep-2.9%
Oct-5.8%
Nov+10.7%
Dec+1.3%
2000
Jan-15.9%
Feb-7.7%
Mar+11.6%
Apr+2.9%
May+4.2%
Jun-7.0%
Jul+3.1%
Aug-2.6%
Sep+8.4%
Oct-8.7%
Nov-1.9%
Dec+11.9%
1999
Jan-2.1%
Feb-0.7%
Mar+0.4%
Apr+1.1%
May-1.4%
Jun-0.4%
Jul+3.3%
Aug-16.3%
Sep+11.4%
Oct+23.6%
Nov+8.9%
Dec+35.0%
1998
Jan+20.5%
Feb+3.3%
Mar-0.5%
Apr+13.9%
May-9.9%
Jun-10.4%
Jul+3.5%
Aug+5.6%
Sep+23.9%
Oct+14.2%
Nov+2.3%
Dec+3.7%
1997
Jan-6.6%
Feb-0.9%
Mar-11.9%
Apr-4.9%
May+18.8%
Jun+7.7%
Jul-11.6%
Aug+1.0%
Sep-0.5%
Oct+3.0%
Nov-12.6%
Dec-16.1%
1996
Jan—
Feb—
Mar-4.2%
Apr+10.5%
May+11.1%
Jun+12.1%
Jul+10.8%
Aug+4.6%
Sep+21.4%
Oct+1.8%
Nov+1.8%
Dec-0.9%
Avg
Jan+0.3%
Feb+1.2%
Mar+1.7%
Apr+3.1%
May+1.8%
Jun+1.2%
Jul+2.0%
Aug+0.6%
Sep+1.8%
Oct+2.5%
Nov+0.8%
Dec+2.6%
Median
Jan-0.4%
Feb+0.8%
Mar+0.5%
Apr+2.9%
May+0.5%
Jun+2.4%
Jul+2.8%
Aug+1.0%
Sep+1.8%
Oct+1.1%
Nov+0.9%
Dec+1.3%
Last 5Y Avg
Jan+0.3%
Feb+5.9%
Mar+1.3%
Apr+5.1%
May+2.6%
Jun+2.8%
Jul+4.1%
Aug+5.3%
Sep-2.4%
Oct+4.7%
Nov+0.1%
Dec+0.4%
Std Dev (σ)
Jan9.3%
Feb7.7%
Mar9.3%
Apr8.1%
May6.8%
Jun9.5%
Jul6.1%
Aug6.7%
Sep9.7%
Oct8.2%
Nov7.6%
Dec9.8%
Consistency (μ/σ)
Jan0.03
Feb0.15
Mar0.18
Apr0.38
May0.27
Jun0.13
Jul0.32
Aug0.08
Sep0.18
Oct0.31
Nov0.10
Dec0.27
Win Rate (%)
Jan50%
Feb53%
Mar55%
Apr68%
May55%
Jun57%
Jul63%
Aug60%
Sep53%
Oct57%
Nov50%
Dec57%
Winning / Losing Months
Jan▲15▼15
Feb▲16▼14
Mar▲17▼14
Apr▲21▼10
May▲17▼14
Jun▲17▼13
Jul▲19▼11
Aug▲18▼12
Sep▲16▼14
Oct▲17▼13
Nov▲15▼15
Dec▲17▼13
Longest Win / Loss Streak
Jan▲3▼2
Feb▲5▼3
Mar▲4▼3
Apr▲4▼2
May▲4▼5
Jun▲3▼3
Jul▲7▼3
Aug▲8▼4
Sep▲4▼4
Oct▲4▼4
Nov▲2▼2
Dec▲4▼4
Best
Jan+20.5%1998
Feb+17.6%2026
Mar+20.9%2011
Apr+28.5%2009
May+18.8%1997
Jun+17.1%2012
Jul+14.4%2024
Aug+10.4%2024
Sep+23.9%1998
Oct+23.6%1999
Nov+17.3%2002
Dec+35.0%1999
Worst
Jan-17.2%2009
Feb-12.5%2008
Mar-19.9%2020
Apr-8.4%2019
May-9.9%1998
Jun-25.0%2013
Jul-11.6%1997
Aug-16.3%1999
Sep-15.5%2008
Oct-11.3%2018
Nov-16.1%2025
Dec-16.1%1997
−25.0%+35.0%
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