WTM
$2,213.61+2.15%
White Mountains Insurance Group Ltd.Stock · FinancialsRussell 1000 · 0.007% of IWBRussell 3000 · 0.007% of IWVUS Stock Market · 0.007% of VTI
White Mountains Insurance Group Ltd. monthly returns
White Mountains Insurance Group Ltd. has averaged 1.12% per month, positive in 58% of months. Month-by-month returns for White Mountains Insurance Group Ltd. (WTM) below, through October 20, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Average month
+1.1%
478 months
Best month
+67.8%
Sep 2000
Worst month
-26.7%
Oct 2008
Positive months
58%
of all months
White Mountains Insurance Group Ltd. monthly returns#
| Month | Path | Total return |
|---|---|---|
| Oct 2026 | +10.3% | |
| Sep 2026 | -4.5% | |
| Aug 2026 | +0.2% | |
| Jul 2026 | +1.2% | |
| Jun 2026 | +0.4% | |
| May 2026 | -7.5% | |
| Apr 2026 | +1.6% | |
| Mar 2026 | -1.0% | |
| Feb 2026 | +8.6% | |
| Jan 2026 | -1.6% | |
| Dec 2025 | +2.7% | |
| Nov 2025 | +6.3% | |
| Oct 2025 | +13.9% | |
| Sep 2025 | -8.7% | |
| Aug 2025 | +2.4% | |
| Jul 2025 | -0.4% | |
| Jun 2025 | +0.6% | |
| May 2025 | +1.0% | |
| Apr 2025 | -8.2% | |
| Mar 2025 | +4.2% | |
| Feb 2025 | -4.3% | |
| Jan 2025 | -0.6% | |
| Dec 2024 | -3.2% | |
| Nov 2024 | +11.8% | |
| Oct 2024 | +6.0% | |
| Sep 2024 | -8.0% | |
| Aug 2024 | +3.3% | |
| Jul 2024 | -1.7% | |
| Jun 2024 | +0.6% | |
| May 2024 | +1.6% | |
| Apr 2024 | -0.9% | |
| Mar 2024 | +1.7% | |
| Feb 2024 | +12.0% | |
| Jan 2024 | +4.7% | |
| Dec 2023 | -1.8% | |
| Nov 2023 | +7.1% | |
| Oct 2023 | -4.3% | |
| Sep 2023 | -5.9% | |
| Aug 2023 | +2.7% | |
| Jul 2023 | +11.4% | |
| Jun 2023 | +2.6% | |
| May 2023 | -5.4% | |
| Apr 2023 | +4.0% | |
| Mar 2023 | -4.5% | |
| Feb 2023 | -5.5% | |
| Jan 2023 | +8.0% | |
| Dec 2022 | +4.1% | |
| Nov 2022 | -4.0% | |
| Oct 2022 | +8.7% | |
| Sep 2022 | -4.9% | |
| Aug 2022 | +10.5% | |
| Jul 2022 | -0.5% | |
| Jun 2022 | +0.1% | |
| May 2022 | +18.8% | |
| Apr 2022 | -7.8% | |
| Mar 2022 | +8.3% | |
| Feb 2022 | +0.9% | |
| Jan 2022 | +2.7% | |
| Dec 2021 | +1.1% | |
| Nov 2021 | -4.9% | |
| Oct 2021 | -1.4% | |
| Sep 2021 | -4.6% | |
| Aug 2021 | -1.0% | |
| Jul 2021 | -1.4% | |
| Jun 2021 | -3.8% | |
| May 2021 | +2.4% | |
| Apr 2021 | +4.5% | |
| Mar 2021 | -6.6% | |
| Feb 2021 | +17.2% | |
| Jan 2021 | +1.9% | |
| Dec 2020 | +4.2% | |
| Nov 2020 | +5.7% | |
| Oct 2020 | +16.6% | |
| Sep 2020 | -12.6% | |
| Aug 2020 | +1.3% | |
| Jul 2020 | -0.9% | |
| Jun 2020 | -3.0% | |
| May 2020 | -5.9% | |
| Apr 2020 | +6.9% | |
| Mar 2020 | -8.0% | |
| Feb 2020 | -11.4% | |
| Jan 2020 | +0.2% | |
| Dec 2019 | +0.8% | |
| Nov 2019 | +3.4% | |
| Oct 2019 | -0.8% | |
| Sep 2019 | +1.8% | |
| Aug 2019 | -1.4% | |
| Jul 2019 | +5.3% | |
| Jun 2019 | +4.3% | |
| May 2019 | +4.3% | |
| Apr 2019 | +1.5% | |
| Mar 2019 | -1.4% | |
| Feb 2019 | +5.1% | |
| Jan 2019 | +4.2% | |
| Dec 2018 | -7.7% | |
| Nov 2018 | +4.7% | |
| Oct 2018 | -5.3% | |
| Sep 2018 | +0.9% | |
| Aug 2018 | +1.6% | |
| Jul 2018 | +0.7% | |
| Jun 2018 | +0.5% | |
| May 2018 | +4.3% | |
| Apr 2018 | +5.2% | |
| Mar 2018 | +2.1% | |
| Feb 2018 | -3.9% | |
| Jan 2018 | -1.3% | |
| Dec 2017 | -4.5% | |
| Nov 2017 | +0.2% | |
| Oct 2017 | +3.8% | |
| Sep 2017 | -1.6% | |
| Aug 2017 | +0.7% | |
| Jul 2017 | -0.5% | |
| Jun 2017 | +1.0% | |
| May 2017 | +0.1% | |
| Apr 2017 | -2.4% | |
| Mar 2017 | -5.9% | |
| Feb 2017 | +2.9% | |
| Jan 2017 | +8.8% | |
| Dec 2016 | -0.1% | |
| Nov 2016 | +0.9% |
Monthly total return (since Nov 2021)#
-10%0%10%
Nov 2021-4.9%
Dec 2021+1.1%
Jan 2022+2.7%2022
Feb 2022+0.89%
Mar 2022+8.3%
Apr 2022-7.8%
May 2022+19%
Jun 2022+0.1%
Jul 2022-0.54%
Aug 2022+11%
Sep 2022-4.9%
Oct 2022+8.7%
Nov 2022-4.0%
Dec 2022+4.1%
Jan 2023+8.0%2023
Feb 2023-5.5%
Mar 2023-4.5%
Apr 2023+4.0%
May 2023-5.4%
Jun 2023+2.6%
Jul 2023+11%
Aug 2023+2.7%
Sep 2023-5.9%
Oct 2023-4.3%
Nov 2023+7.1%
Dec 2023-1.8%
Jan 2024+4.7%2024
Feb 2024+12%
Mar 2024+1.7%
Apr 2024-0.9%
May 2024+1.6%
Jun 2024+0.58%
Jul 2024-1.7%
Aug 2024+3.3%
Sep 2024-8.0%
Oct 2024+6.0%
Nov 2024+12%
Dec 2024-3.2%
Jan 2025-0.65%2025
Feb 2025-4.3%
Mar 2025+4.2%
Apr 2025-8.2%
May 2025+0.98%
Jun 2025+0.61%
Jul 2025-0.44%
Aug 2025+2.4%
Sep 2025-8.7%
Oct 2025+14%
Nov 2025+6.3%
Dec 2025+2.7%
Jan 2026-1.6%2026
Feb 2026+8.6%
Mar 2026-1.0%
Apr 2026+1.6%
May 2026-7.5%
Jun 2026+0.41%
Jul 2026+1.2%
Aug 2026+0.2%
Sep 2026-4.5%
Oct 2026+10%
White Mountains Insurance Group Ltd. returns by calendar month#
Every month of every year since 1987, one tick per year on a shared scale; the dark bar is the month's average. Total returns, dividends reinvested.
October 2026 so far: +10.32% — 5th of 40 Octobers since 1987 at the last close; the average October returned +0.9%.
| Month | −70%0+70% | Average | Median | Up | Best | Worst |
|---|---|---|---|---|---|---|
| Jan | +0.3% | +0.1% | 53% | +12.8% 1989 | -10.4% 1990 | |
| Feb | +2.3% | +1.9% | 60% | +17.2% 2021 | -18.0% 2009 | |
| Mar | +0.7% | +1.1% | 60% | +22.1% 2000 | -12.6% 2009 | |
| Apr | +0.5% | +1.3% | 53% | +11.3% 2009 | -12.3% 2006 | |
| May | +2.5% | +1.6% | 68% | +18.8% 2022 | -7.5% 2026 | |
| Jun | +0.7% | +0.6% | 63% | +17.4% 1988 | -10.8% 2002 | |
| Jul | +1.0% | -0.3% | 48% | +12.7% 2009 | -9.3% 2007 | |
| Aug | +2.4% | +1.8% | 65% | +31.2% 1990 | -15.2% 1998 | |
| Sep | +0.1% | -0.6% | 43% | +67.8% 2000 | -12.6% 2020 | |
| Oct | +0.9% | +0.8% | 56% | +16.6% 2020 | -26.7% 2008 | |
| Nov | +1.0% | +1.3% | 72% | +20.9% 2004 | -22.8% 1987 | |
| Dec | +0.8% | +0.8% | 56% | +14.1% 2000 | -11.3% 1993 |
Methodology#
Monthly returns are total returns (dividends reinvested), computed from WTM's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
FAQ#
- What is White Mountains Insurance Group Ltd.'s average monthly return?
- White Mountains Insurance Group Ltd. (WTM) has averaged about 1.12% per month, positive in roughly 58% of months. The best month was Sep 2000 (+67.8%) and the worst was Oct 2008 (-26.7%).
More on White Mountains Insurance Group Ltd.
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