What is the current 10-day volatility of WTM?

As of today, WTM 10-day volatility is 13.92%

What 10-day volatility category does WTM fall into?

Based on its current 10-day historical volatility, WTM falls into the very low volatility category

What is WTM 10-day volatility 1-year high?

WTM 10-day volatility reached a 1-year high of 62.01% on October 7, 2025

What is WTM 10-day volatility 1-year low?

WTM 10-day volatility reached a 1-year low of 8.89% on December 11, 2025

What is the current 1-month volatility of WTM?

As of today, WTM 1-month volatility is 13.82%

What 1-month volatility category does WTM fall into?

Based on its current 1-month historical volatility, WTM falls into the very low volatility category

What is WTM 1-month volatility 1-year high?

WTM 1-month volatility reached a 1-year high of 47.33% on October 19, 2025

What is WTM 1-month volatility 1-year low?

WTM 1-month volatility reached a 1-year low of 9.47% on December 21, 2025

What is the current 3-month volatility of WTM?

As of today, WTM 3-month volatility is 17.74%

What 3-month volatility category does WTM fall into?

Based on its current 3-month historical volatility, WTM falls into the low volatility category

What is WTM 3-month volatility 1-year high?

WTM 3-month volatility reached a 1-year high of 32.98% on November 22, 2025

What is WTM 3-month volatility 1-year low?

WTM 3-month volatility reached a 1-year low of 17.61% on January 28, 2026

What is the current 1-year volatility of WTM?

As of today, WTM 1-year volatility is 24.67%

What 1-year volatility category does WTM fall into?

Based on its current 1-year historical volatility, WTM falls into the low volatility category

What is WTM 1-year volatility 1-year high?

WTM 1-year volatility reached a 1-year high of 25.52% on October 18, 2025

What is WTM 1-year volatility 1-year low?

WTM 1-year volatility reached a 1-year low of 22.19% on August 8, 2025

WTM Stock Volatility History & Chart Since 1985

10-Day

13.92%

January 28, 2026

Summary

Current Value: As of today, WTM 10-day volatility is 13.92%, up +2.50% on January 28, 2026
Value Category: Based on its current 10-day historical volatility, WTM falls into the very low volatility category
1-Year High: WTM 10-day volatility reached a 1-year high of 62.01% on October 7, 2025
1-Year Low: WTM 10-day volatility reached a 1-year low of 8.89% on December 11, 2025

10-Day Volatility Chart

Performance

WTM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Jan 28, 26	13.92%	+2.5%	-5.8%	-50.8%	+7.4%	+15.4%	-41.4%	-40.6%
1-Month Volatility	Jan 28, 26	13.82%	-0.4%	+16.4%	-67.7%	+19.3%	-25.1%	-35.4%	-47.4%
3-Month Volatility	Jan 28, 26	17.74%	-0.8%	-39.8%	-45.9%	-39.4%	-19.5%	-24.3%	-36.3%
1-Year Volatility	Jan 28, 26	24.67%	+0.2%	-0.9%	-3.2%	-0.8%	+7.5%	-2.0%	-41.8%
14-Day RSI	Jan 28, 26	46.54	-6.3%	-26.3%	-14.7%	-26.7%	-19.4%	-30.4%	-9.0%
Beta	Jan 28, 26	0.36	+2.9%	0.0%	-12.2%	0.0%	+2.9%	+50.0%	-50.0%
ATR	Jan 28, 26	$42.19	-2.0%	+4.9%	+4.0%	+1.2%	+35.6%	+40.9%	+55.3%
Price	Jan 29, 26	$2,061.39	+1.1%	-0.7%	+8.6%	-0.8%	+6.6%	+37.5%	+102.1%
200-Day SMA	Jan 28, 26	$1,862.19	+0.1%	+1.2%	+2.4%	+1.1%	+2.8%	+44.1%	+103.9%
50-Day SMA	Jan 28, 26	$2,034.73	+0.1%	+3.0%	+11.8%	+2.7%	+5.5%	+46.2%	+103.6%

10-Day Volatility History

Date	Value	Change
Jan 29, 2026	13.92%	+7.4%
Dec 31, 2025	12.96%	-36.9%
Dec 31, 2024	20.54%	-34.6%
Dec 31, 2023	31.39%	+221.3%
Dec 31, 2022	9.77%	-9.1%
Dec 31, 2021	10.75%	-59.5%
Dec 31, 2020	26.54%	+75.5%
Dec 31, 2019	15.12%	-21.6%
Dec 31, 2018	19.29%	+172.8%
Dec 31, 2017	7.07%	-62.2%
Dec 31, 2016	18.72%	-4.0%
Dec 31, 2015	19.51%	+27.1%
Dec 31, 2014	15.35%	+8.1%
Dec 31, 2013	14.20%	+37.6%
Dec 31, 2012	10.32%	-56.8%
Dec 31, 2011	23.90%	+138.5%
Dec 31, 2010	10.02%	-31.3%
Dec 31, 2009	14.59%	-74.9%
Dec 31, 2008	58.10%	+240.4%
Dec 31, 2007	17.07%	+20.4%
Dec 31, 2006	14.18%	+37.1%

Date	Value	Change
Dec 31, 2005	10.34%	-50.9%
Dec 31, 2004	21.08%	+58.5%
Dec 31, 2003	13.30%	-53.1%
Dec 31, 2002	28.37%	+42.8%
Dec 31, 2001	19.87%	-0.9%
Dec 31, 2000	20.06%	+16.4%
Dec 31, 1999	17.24%	+190.2%
Dec 31, 1998	5.94%	-40.8%
Dec 31, 1997	10.03%	+23.5%
Dec 31, 1996	8.12%	-72.4%
Dec 31, 1995	29.39%	+39.4%
Dec 31, 1994	21.09%	-78.0%
Dec 31, 1993	95.96%	+711.8%
Dec 31, 1992	11.82%	-25.8%
Dec 31, 1991	15.94%	+58.1%
Dec 31, 1990	10.08%	-62.3%
Dec 31, 1989	26.72%	+163.5%
Dec 31, 1988	10.14%	-69.5%
Dec 31, 1987	33.20%	+27.7%
Dec 31, 1986	26.00%	+75.0%
Dec 31, 1985	14.86%	-

FAQ

What is the current 10-day volatility of WTM?
As of today, WTM 10-day volatility is 13.92%
What 10-day volatility category does WTM fall into?
Based on its current 10-day historical volatility, WTM falls into the very low volatility category
What is WTM 10-day volatility 1-year high?
WTM 10-day volatility reached a 1-year high of 62.01% on October 7, 2025
What is WTM 10-day volatility 1-year low?
WTM 10-day volatility reached a 1-year low of 8.89% on December 11, 2025

1-Month

13.82%

January 28, 2026

Summary

Current Value: As of today, WTM 1-month volatility is 13.82%, down -0.36% on January 28, 2026
Value Category: Based on its current 1-month historical volatility, WTM falls into the very low volatility category
1-Year High: WTM 1-month volatility reached a 1-year high of 47.33% on October 19, 2025
1-Year Low: WTM 1-month volatility reached a 1-year low of 9.47% on December 21, 2025

Performance

WTM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Jan 28, 26	13.82%	-0.4%	+16.4%	-67.7%	+19.3%	-25.1%	-35.4%	-47.4%
10-Day Volatility	Jan 28, 26	13.92%	+2.5%	-5.8%	-50.8%	+7.4%	+15.4%	-41.4%	-40.6%
3-Month Volatility	Jan 28, 26	17.74%	-0.8%	-39.8%	-45.9%	-39.4%	-19.5%	-24.3%	-36.3%
1-Year Volatility	Jan 28, 26	24.67%	+0.2%	-0.9%	-3.2%	-0.8%	+7.5%	-2.0%	-41.8%
14-Day RSI	Jan 28, 26	46.54	-6.3%	-26.3%	-14.7%	-26.7%	-19.4%	-30.4%	-9.0%
Beta	Jan 28, 26	0.36	+2.9%	0.0%	-12.2%	0.0%	+2.9%	+50.0%	-50.0%
ATR	Jan 28, 26	$42.19	-2.0%	+4.9%	+4.0%	+1.2%	+35.6%	+40.9%	+55.3%
Price	Jan 29, 26	$2,061.39	+1.1%	-0.7%	+8.6%	-0.8%	+6.6%	+37.5%	+102.1%
200-Day SMA	Jan 28, 26	$1,862.19	+0.1%	+1.2%	+2.4%	+1.1%	+2.8%	+44.1%	+103.9%
50-Day SMA	Jan 28, 26	$2,034.73	+0.1%	+3.0%	+11.8%	+2.7%	+5.5%	+46.2%	+103.6%

1-Month Volatility History

Date	Value	Change
Jan 29, 2026	13.82%	+22.2%
Dec 31, 2025	11.31%	-43.9%
Dec 31, 2024	20.15%	-25.5%
Dec 31, 2023	27.03%	+40.8%
Dec 31, 2022	19.20%	+16.7%
Dec 31, 2021	16.45%	-22.3%
Dec 31, 2020	21.16%	+52.1%
Dec 31, 2019	13.91%	-5.6%
Dec 31, 2018	14.73%	+62.4%
Dec 31, 2017	9.07%	-48.3%
Dec 31, 2016	17.54%	+12.2%
Dec 31, 2015	15.63%	-29.9%
Dec 31, 2014	22.31%	+32.2%
Dec 31, 2013	16.88%	+101.0%
Dec 31, 2012	8.40%	-56.2%
Dec 31, 2011	19.19%	+60.3%
Dec 31, 2010	11.97%	-51.5%
Dec 31, 2009	24.70%	-69.7%
Dec 31, 2008	81.51%	+256.3%
Dec 31, 2007	22.88%	+79.2%
Dec 31, 2006	12.77%	-5.1%

Date	Value	Change
Dec 31, 2005	13.45%	-30.8%
Dec 31, 2004	19.45%	+17.7%
Dec 31, 2003	16.53%	-21.1%
Dec 31, 2002	20.95%	-5.0%
Dec 31, 2001	22.05%	+27.3%
Dec 31, 2000	17.32%	-13.6%
Dec 31, 1999	20.04%	+96.5%
Dec 31, 1998	10.20%	-1.5%
Dec 31, 1997	10.36%	-15.3%
Dec 31, 1996	12.23%	-42.3%
Dec 31, 1995	21.18%	+2.6%
Dec 31, 1994	20.65%	-68.2%
Dec 31, 1993	65.03%	+410.8%
Dec 31, 1992	12.73%	-11.2%
Dec 31, 1991	14.33%	+16.5%
Dec 31, 1990	12.30%	-51.3%
Dec 31, 1989	25.28%	+114.1%
Dec 31, 1988	11.81%	-64.5%
Dec 31, 1987	33.29%	-9.9%
Dec 31, 1986	36.96%	+49.6%
Dec 31, 1985	24.71%	-

FAQ

What is the current 1-month volatility of WTM?
As of today, WTM 1-month volatility is 13.82%
What 1-month volatility category does WTM fall into?
Based on its current 1-month historical volatility, WTM falls into the very low volatility category
What is WTM 1-month volatility 1-year high?
WTM 1-month volatility reached a 1-year high of 47.33% on October 19, 2025
What is WTM 1-month volatility 1-year low?
WTM 1-month volatility reached a 1-year low of 9.47% on December 21, 2025

3-Month

17.74%

January 28, 2026

Summary

Current Value: As of today, WTM 3-month volatility is 17.74%, down -0.84% on January 28, 2026
Value Category: Based on its current 3-month historical volatility, WTM falls into the low volatility category
1-Year High: WTM 3-month volatility reached a 1-year high of 32.98% on November 22, 2025
1-Year Low: WTM 3-month volatility reached a 1-year low of 17.61% on January 28, 2026

Performance

WTM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Jan 28, 26	17.74%	-0.8%	-39.8%	-45.9%	-39.4%	-19.5%	-24.3%	-36.3%
10-Day Volatility	Jan 28, 26	13.92%	+2.5%	-5.8%	-50.8%	+7.4%	+15.4%	-41.4%	-40.6%
1-Month Volatility	Jan 28, 26	13.82%	-0.4%	+16.4%	-67.7%	+19.3%	-25.1%	-35.4%	-47.4%
1-Year Volatility	Jan 28, 26	24.67%	+0.2%	-0.9%	-3.2%	-0.8%	+7.5%	-2.0%	-41.8%
14-Day RSI	Jan 28, 26	46.54	-6.3%	-26.3%	-14.7%	-26.7%	-19.4%	-30.4%	-9.0%
Beta	Jan 28, 26	0.36	+2.9%	0.0%	-12.2%	0.0%	+2.9%	+50.0%	-50.0%
ATR	Jan 28, 26	$42.19	-2.0%	+4.9%	+4.0%	+1.2%	+35.6%	+40.9%	+55.3%
Price	Jan 29, 26	$2,061.39	+1.1%	-0.7%	+8.6%	-0.8%	+6.6%	+37.5%	+102.1%
200-Day SMA	Jan 28, 26	$1,862.19	+0.1%	+1.2%	+2.4%	+1.1%	+2.8%	+44.1%	+103.9%
50-Day SMA	Jan 28, 26	$2,034.73	+0.1%	+3.0%	+11.8%	+2.7%	+5.5%	+46.2%	+103.6%

3-Month Volatility History

Date	Value	Change
Jan 29, 2026	17.74%	-39.3%
Dec 31, 2025	29.23%	+26.0%
Dec 31, 2024	23.20%	-11.4%
Dec 31, 2023	26.18%	+7.3%
Dec 31, 2022	24.40%	+16.1%
Dec 31, 2021	21.01%	-34.2%
Dec 31, 2020	31.93%	+143.2%
Dec 31, 2019	13.13%	-5.5%
Dec 31, 2018	13.90%	+53.4%
Dec 31, 2017	9.06%	-37.0%
Dec 31, 2016	14.38%	-27.4%
Dec 31, 2015	19.82%	+6.3%
Dec 31, 2014	18.64%	+59.3%
Dec 31, 2013	11.70%	+4.4%
Dec 31, 2012	11.21%	-52.3%
Dec 31, 2011	23.51%	+58.9%
Dec 31, 2010	14.80%	-57.5%
Dec 31, 2009	34.80%	-67.6%
Dec 31, 2008	107.49%	+352.4%
Dec 31, 2007	23.76%	+16.9%
Dec 31, 2006	20.32%	+19.7%

Date	Value	Change
Dec 31, 2005	16.98%	-47.8%
Dec 31, 2004	32.51%	+69.8%
Dec 31, 2003	19.15%	-24.7%
Dec 31, 2002	25.42%	+4.8%
Dec 31, 2001	24.26%	-26.8%
Dec 31, 2000	33.15%	+36.0%
Dec 31, 1999	24.37%	+24.7%
Dec 31, 1998	19.54%	-20.3%
Dec 31, 1997	24.52%	+137.1%
Dec 31, 1996	10.34%	-45.3%
Dec 31, 1995	18.92%	+9.9%
Dec 31, 1994	17.21%	-56.5%
Dec 31, 1993	39.55%	+296.7%
Dec 31, 1992	9.97%	-8.4%
Dec 31, 1991	10.88%	-45.8%
Dec 31, 1990	20.09%	-13.4%
Dec 31, 1989	23.19%	+37.5%
Dec 31, 1988	16.87%	-71.7%
Dec 31, 1987	59.61%	+92.4%
Dec 31, 1986	30.99%	+15.5%
Dec 31, 1985	26.82%	-

FAQ

What is the current 3-month volatility of WTM?
As of today, WTM 3-month volatility is 17.74%
What 3-month volatility category does WTM fall into?
Based on its current 3-month historical volatility, WTM falls into the low volatility category
What is WTM 3-month volatility 1-year high?
WTM 3-month volatility reached a 1-year high of 32.98% on November 22, 2025
What is WTM 3-month volatility 1-year low?
WTM 3-month volatility reached a 1-year low of 17.61% on January 28, 2026

1-Year

24.67%

January 28, 2026

Summary

Current Value: As of today, WTM 1-year volatility is 24.67%, up +0.20% on January 28, 2026
Value Category: Based on its current 1-year historical volatility, WTM falls into the low volatility category
1-Year High: WTM 1-year volatility reached a 1-year high of 25.52% on October 18, 2025
1-Year Low: WTM 1-year volatility reached a 1-year low of 22.19% on August 8, 2025

Performance

WTM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Jan 28, 26	24.67%	+0.2%	-0.9%	-3.2%	-0.8%	+7.5%	-2.0%	-41.8%
10-Day Volatility	Jan 28, 26	13.92%	+2.5%	-5.8%	-50.8%	+7.4%	+15.4%	-41.4%	-40.6%
1-Month Volatility	Jan 28, 26	13.82%	-0.4%	+16.4%	-67.7%	+19.3%	-25.1%	-35.4%	-47.4%
3-Month Volatility	Jan 28, 26	17.74%	-0.8%	-39.8%	-45.9%	-39.4%	-19.5%	-24.3%	-36.3%
1-Year Volatility	Jan 28, 26	24.67%	+0.2%	-0.9%	-3.2%	-0.8%	+7.5%	-2.0%	-41.8%
14-Day RSI	Jan 28, 26	46.54	-6.3%	-26.3%	-14.7%	-26.7%	-19.4%	-30.4%	-9.0%
Beta	Jan 28, 26	0.36	+2.9%	0.0%	-12.2%	0.0%	+2.9%	+50.0%	-50.0%
ATR	Jan 28, 26	$42.19	-2.0%	+4.9%	+4.0%	+1.2%	+35.6%	+40.9%	+55.3%
Price	Jan 29, 26	$2,061.39	+1.1%	-0.7%	+8.6%	-0.8%	+6.6%	+37.5%	+102.1%
200-Day SMA	Jan 28, 26	$1,862.19	+0.1%	+1.2%	+2.4%	+1.1%	+2.8%	+44.1%	+103.9%
50-Day SMA	Jan 28, 26	$2,034.73	+0.1%	+3.0%	+11.8%	+2.7%	+5.5%	+46.2%	+103.6%

1-Year Volatility History

Date	Value	Change
Jan 29, 2026	24.67%	-0.8%
Dec 31, 2025	24.88%	+7.9%
Dec 31, 2024	23.05%	-8.7%
Dec 31, 2023	25.26%	+2.1%
Dec 31, 2022	24.73%	+12.1%
Dec 31, 2021	22.07%	-47.2%
Dec 31, 2020	41.77%	+206.9%
Dec 31, 2019	13.61%	-4.4%
Dec 31, 2018	14.23%	+20.5%
Dec 31, 2017	11.81%	-26.8%
Dec 31, 2016	16.14%	-11.4%
Dec 31, 2015	18.22%	+38.6%
Dec 31, 2014	13.15%	-10.5%
Dec 31, 2013	14.70%	-4.6%
Dec 31, 2012	15.41%	-46.9%
Dec 31, 2011	29.00%	+35.8%
Dec 31, 2010	21.35%	-59.3%
Dec 31, 2009	52.41%	-18.9%
Dec 31, 2008	64.61%	+199.3%
Dec 31, 2007	21.59%	-12.9%
Dec 31, 2006	24.78%	+6.2%

Date	Value	Change
Dec 31, 2005	23.33%	-10.8%
Dec 31, 2004	26.15%	+40.4%
Dec 31, 2003	18.63%	-23.9%
Dec 31, 2002	24.48%	-2.2%
Dec 31, 2001	25.03%	-32.8%
Dec 31, 2000	37.24%	+78.2%
Dec 31, 1999	20.90%	+24.0%
Dec 31, 1998	16.85%	-10.3%
Dec 31, 1997	18.79%	+50.0%
Dec 31, 1996	12.53%	-12.3%
Dec 31, 1995	14.28%	-13.0%
Dec 31, 1994	16.41%	-25.6%
Dec 31, 1993	22.05%	+97.4%
Dec 31, 1992	11.17%	-12.8%
Dec 31, 1991	12.81%	-66.8%
Dec 31, 1990	38.53%	+80.3%
Dec 31, 1989	21.37%	-7.1%
Dec 31, 1988	23.00%	-39.6%
Dec 31, 1987	38.08%	+17.8%
Dec 31, 1986	32.32%	+20.5%
Dec 31, 1985	26.82%	-

FAQ

What is the current 1-year volatility of WTM?
As of today, WTM 1-year volatility is 24.67%
What 1-year volatility category does WTM fall into?
Based on its current 1-year historical volatility, WTM falls into the low volatility category
What is WTM 1-year volatility 1-year high?
WTM 1-year volatility reached a 1-year high of 25.52% on October 18, 2025
What is WTM 1-year volatility 1-year low?
WTM 1-year volatility reached a 1-year low of 22.19% on August 8, 2025

Data Sources & References

WTM Official Website www.whitemountains.com
Most Recent Quarterly Report (10-Q) www.sec.gov/Archives/edgar/data/776867/000162828025049910/0001628280-25-049910-index.htm
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/776867/000077686725000003/0000776867-25-000003-index.htm
WTM Profile on Yahoo Finance finance.yahoo.com/quote/WTM
WTM Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/wtm