What is the current 10-day volatility of WLK?

As of today, WLK 10-day volatility is 58.83%

What 10-day volatility category does WLK fall into?

Based on its current 10-day historical volatility, WLK falls into the high volatility category

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

WLK 10-day volatility reached a 1-year high of 97.53% on April 11, 2025

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

WLK 10-day volatility reached a 1-year low of 19.59% on September 25, 2025

What is the current 1-month volatility of WLK?

As of today, WLK 1-month volatility is 55.93%

What 1-month volatility category does WLK fall into?

Based on its current 1-month historical volatility, WLK falls into the high volatility category

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

WLK 1-month volatility reached a 1-year high of 81.25% on May 2, 2025

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

WLK 1-month volatility reached a 1-year low of 21.80% on February 13, 2025

What is the current 3-month volatility of WLK?

As of today, WLK 3-month volatility is 46.71%

What 3-month volatility category does WLK fall into?

Based on its current 3-month historical volatility, WLK falls into the high volatility category

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

WLK 3-month volatility reached a 1-year high of 58.59% on July 1, 2025

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

WLK 3-month volatility reached a 1-year low of 20.64% on February 13, 2025

What is the current 1-year volatility of WLK?

As of today, WLK 1-year volatility is 48.90%

What 1-year volatility category does WLK fall into?

Based on its current 1-year historical volatility, WLK falls into the high volatility category

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

WLK 1-year volatility reached a 1-year high of 48.90% on February 13, 2026

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

WLK 1-year volatility reached a 1-year low of 24.60% on February 24, 2025

WLK Stock Volatility History & Chart Since 2004

10-Day

58.83%

February 13, 2026

Summary

Current Value: As of today, WLK 10-day volatility is 58.83%, down -8.45% on February 13, 2026
Value Category: Based on its current 10-day historical volatility, WLK falls into the high volatility category
1-Year High: WLK 10-day volatility reached a 1-year high of 97.53% on April 11, 2025
1-Year Low: WLK 10-day volatility reached a 1-year low of 19.59% on September 25, 2025

10-Day Volatility Chart

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Feb 13, 26	58.83%	-8.4%	+23.3%	+103.3%	+130.3%	+104.3%	+148.1%	+205.9%
1-Month Volatility	Feb 13, 26	55.93%	+0.9%	+44.3%	+42.1%	+71.5%	+156.6%	+123.9%	+85.5%
3-Month Volatility	Feb 13, 26	46.71%	-1.6%	+9.3%	+11.5%	+10.5%	+126.3%	+49.1%	+43.8%
1-Year Volatility	Feb 13, 26	48.90%	+0.1%	+5.3%	+11.9%	+7.2%	+88.2%	+26.1%	-27.8%
14-Day RSI	Feb 13, 26	69.43	+2.0%	-5.7%	+107.0%	+19.5%	+54.0%	+3.1%	+12.5%
Beta	Feb 13, 26	1.24	0.0%	0.0%	+8.8%	+2.5%	+36.3%	+26.5%	-14.5%
ATR	Feb 13, 26	$4.24	-0.4%	+36.8%	+56.5%	+76.8%	+60.5%	+37.9%	+63.4%
Price	Feb 13, 26	$100.08	+1.4%	+17.7%	+54.2%	+35.4%	-11.1%	-19.9%	+14.9%
200-Day SMA	Feb 13, 26	$78.64	+0.0%	-0.4%	-9.3%	-1.6%	-42.7%	-25.9%	+20.1%
50-Day SMA	Feb 13, 26	$81.08	+0.8%	+16.5%	+4.8%	+17.3%	-30.2%	-27.3%	-2.4%

10-Day Volatility History

Date	Value	Change
Feb 13, 2026	58.83%	+130.3%
Dec 31, 2025	25.55%	+56.0%
Dec 31, 2024	16.38%	+12.5%
Dec 31, 2023	14.56%	-33.2%
Dec 31, 2022	21.81%	-23.7%
Dec 31, 2021	28.60%	+74.7%
Dec 31, 2020	16.37%	-2.2%
Dec 31, 2019	16.73%	-53.1%
Dec 31, 2018	35.68%	+160.2%
Dec 31, 2017	13.71%	-13.9%
Dec 31, 2016	15.92%	-56.2%
Dec 31, 2015	36.32%	-4.5%

Date	Value	Change
Dec 31, 2014	38.03%	+146.9%
Dec 31, 2013	15.40%	-34.6%
Dec 31, 2012	23.56%	-31.2%
Dec 31, 2011	34.26%	+292.0%
Dec 31, 2010	8.74%	-74.2%
Dec 31, 2009	33.93%	-43.1%
Dec 31, 2008	59.65%	+46.5%
Dec 31, 2007	40.72%	+23.5%
Dec 31, 2006	32.96%	+63.5%
Dec 31, 2005	20.16%	-52.8%
Dec 31, 2004	42.75%	-

FAQ

What is the current 10-day volatility of WLK?
As of today, WLK 10-day volatility is 58.83%
What 10-day volatility category does WLK fall into?
Based on its current 10-day historical volatility, WLK falls into the high volatility category
What is WLK 10-day volatility 1-year high?
WLK 10-day volatility reached a 1-year high of 97.53% on April 11, 2025
What is WLK 10-day volatility 1-year low?
WLK 10-day volatility reached a 1-year low of 19.59% on September 25, 2025

1-Month

55.93%

February 13, 2026

Summary

Current Value: As of today, WLK 1-month volatility is 55.93%, up +0.94% on February 13, 2026
Value Category: Based on its current 1-month historical volatility, WLK falls into the high volatility category
1-Year High: WLK 1-month volatility reached a 1-year high of 81.25% on May 2, 2025
1-Year Low: WLK 1-month volatility reached a 1-year low of 21.80% on February 13, 2025

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Feb 13, 26	55.93%	+0.9%	+44.3%	+42.1%	+71.5%	+156.6%	+123.9%	+85.5%
10-Day Volatility	Feb 13, 26	58.83%	-8.4%	+23.3%	+103.3%	+130.3%	+104.3%	+148.1%	+205.9%
3-Month Volatility	Feb 13, 26	46.71%	-1.6%	+9.3%	+11.5%	+10.5%	+126.3%	+49.1%	+43.8%
1-Year Volatility	Feb 13, 26	48.90%	+0.1%	+5.3%	+11.9%	+7.2%	+88.2%	+26.1%	-27.8%
14-Day RSI	Feb 13, 26	69.43	+2.0%	-5.7%	+107.0%	+19.5%	+54.0%	+3.1%	+12.5%
Beta	Feb 13, 26	1.24	0.0%	0.0%	+8.8%	+2.5%	+36.3%	+26.5%	-14.5%
ATR	Feb 13, 26	$4.24	-0.4%	+36.8%	+56.5%	+76.8%	+60.5%	+37.9%	+63.4%
Price	Feb 13, 26	$100.08	+1.4%	+17.7%	+54.2%	+35.4%	-11.1%	-19.9%	+14.9%
200-Day SMA	Feb 13, 26	$78.64	+0.0%	-0.4%	-9.3%	-1.6%	-42.7%	-25.9%	+20.1%
50-Day SMA	Feb 13, 26	$81.08	+0.8%	+16.5%	+4.8%	+17.3%	-30.2%	-27.3%	-2.4%

1-Month Volatility History

Date	Value	Change
Feb 13, 2026	55.39%	+73.5%
Dec 31, 2025	31.92%	+81.4%
Dec 31, 2024	17.60%	-42.8%
Dec 31, 2023	30.76%	+24.8%
Dec 31, 2022	24.65%	-21.5%
Dec 31, 2021	31.40%	+28.4%
Dec 31, 2020	24.46%	+9.7%
Dec 31, 2019	22.30%	-39.0%
Dec 31, 2018	36.55%	+159.0%
Dec 31, 2017	14.11%	-23.6%
Dec 31, 2016	18.47%	-46.7%
Dec 31, 2015	34.63%	-21.7%

Date	Value	Change
Dec 31, 2014	44.21%	+134.9%
Dec 31, 2013	18.82%	-23.7%
Dec 31, 2012	24.67%	-26.8%
Dec 31, 2011	33.70%	+85.3%
Dec 31, 2010	18.19%	-43.5%
Dec 31, 2009	32.19%	-49.0%
Dec 31, 2008	63.17%	+28.5%
Dec 31, 2007	49.15%	+54.9%
Dec 31, 2006	31.74%	+17.1%
Dec 31, 2005	27.10%	-49.2%
Dec 31, 2004	53.37%	-

FAQ

What is the current 1-month volatility of WLK?
As of today, WLK 1-month volatility is 55.93%
What 1-month volatility category does WLK fall into?
Based on its current 1-month historical volatility, WLK falls into the high volatility category
What is WLK 1-month volatility 1-year high?
WLK 1-month volatility reached a 1-year high of 81.25% on May 2, 2025
What is WLK 1-month volatility 1-year low?
WLK 1-month volatility reached a 1-year low of 21.80% on February 13, 2025

3-Month

46.71%

February 13, 2026

Summary

Current Value: As of today, WLK 3-month volatility is 46.71%, down -1.56% on February 13, 2026
Value Category: Based on its current 3-month historical volatility, WLK falls into the high volatility category
1-Year High: WLK 3-month volatility reached a 1-year high of 58.59% on July 1, 2025
1-Year Low: WLK 3-month volatility reached a 1-year low of 20.64% on February 13, 2025

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Feb 13, 26	46.71%	-1.6%	+9.3%	+11.5%	+10.5%	+126.3%	+49.1%	+43.8%
10-Day Volatility	Feb 13, 26	58.83%	-8.4%	+23.3%	+103.3%	+130.3%	+104.3%	+148.1%	+205.9%
1-Month Volatility	Feb 13, 26	55.93%	+0.9%	+44.3%	+42.1%	+71.5%	+156.6%	+123.9%	+85.5%
1-Year Volatility	Feb 13, 26	48.90%	+0.1%	+5.3%	+11.9%	+7.2%	+88.2%	+26.1%	-27.8%
14-Day RSI	Feb 13, 26	69.43	+2.0%	-5.7%	+107.0%	+19.5%	+54.0%	+3.1%	+12.5%
Beta	Feb 13, 26	1.24	0.0%	0.0%	+8.8%	+2.5%	+36.3%	+26.5%	-14.5%
ATR	Feb 13, 26	$4.24	-0.4%	+36.8%	+56.5%	+76.8%	+60.5%	+37.9%	+63.4%
Price	Feb 13, 26	$100.08	+1.4%	+17.7%	+54.2%	+35.4%	-11.1%	-19.9%	+14.9%
200-Day SMA	Feb 13, 26	$78.64	+0.0%	-0.4%	-9.3%	-1.6%	-42.7%	-25.9%	+20.1%
50-Day SMA	Feb 13, 26	$81.08	+0.8%	+16.5%	+4.8%	+17.3%	-30.2%	-27.3%	-2.4%

3-Month Volatility History

Date	Value	Change
Feb 13, 2026	47.18%	+12.5%
Dec 31, 2025	41.93%	+118.2%
Dec 31, 2024	19.22%	-33.9%
Dec 31, 2023	29.09%	-31.5%
Dec 31, 2022	42.46%	+25.8%
Dec 31, 2021	33.74%	-12.2%
Dec 31, 2020	38.45%	+8.2%
Dec 31, 2019	35.53%	-0.6%
Dec 31, 2018	35.73%	+74.0%
Dec 31, 2017	20.54%	-32.9%
Dec 31, 2016	30.62%	-7.4%
Dec 31, 2015	33.05%	-25.0%

Date	Value	Change
Dec 31, 2014	44.04%	+122.0%
Dec 31, 2013	19.84%	-42.3%
Dec 31, 2012	34.39%	-34.5%
Dec 31, 2011	52.50%	+48.2%
Dec 31, 2010	35.43%	+5.3%
Dec 31, 2009	33.64%	-64.9%
Dec 31, 2008	95.84%	+131.1%
Dec 31, 2007	41.48%	+14.9%
Dec 31, 2006	36.11%	+11.3%
Dec 31, 2005	32.44%	-21.2%
Dec 31, 2004	41.15%	-

FAQ

What is the current 3-month volatility of WLK?
As of today, WLK 3-month volatility is 46.71%
What 3-month volatility category does WLK fall into?
Based on its current 3-month historical volatility, WLK falls into the high volatility category
What is WLK 3-month volatility 1-year high?
WLK 3-month volatility reached a 1-year high of 58.59% on July 1, 2025
What is WLK 3-month volatility 1-year low?
WLK 3-month volatility reached a 1-year low of 20.64% on February 13, 2025

1-Year

48.90%

February 13, 2026

Summary

Current Value: As of today, WLK 1-year volatility is 48.90%, up +0.08% on February 13, 2026
Value Category: Based on its current 1-year historical volatility, WLK falls into the high volatility category
1-Year High: WLK 1-year volatility reached a 1-year high of 48.90% on February 13, 2026
1-Year Low: WLK 1-year volatility reached a 1-year low of 24.60% on February 24, 2025

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Feb 13, 26	48.90%	+0.1%	+5.3%	+11.9%	+7.2%	+88.2%	+26.1%	-27.8%
10-Day Volatility	Feb 13, 26	58.83%	-8.4%	+23.3%	+103.3%	+130.3%	+104.3%	+148.1%	+205.9%
1-Month Volatility	Feb 13, 26	55.93%	+0.9%	+44.3%	+42.1%	+71.5%	+156.6%	+123.9%	+85.5%
3-Month Volatility	Feb 13, 26	46.71%	-1.6%	+9.3%	+11.5%	+10.5%	+126.3%	+49.1%	+43.8%
1-Year Volatility	Feb 13, 26	48.90%	+0.1%	+5.3%	+11.9%	+7.2%	+88.2%	+26.1%	-27.8%
14-Day RSI	Feb 13, 26	69.43	+2.0%	-5.7%	+107.0%	+19.5%	+54.0%	+3.1%	+12.5%
Beta	Feb 13, 26	1.24	0.0%	0.0%	+8.8%	+2.5%	+36.3%	+26.5%	-14.5%
ATR	Feb 13, 26	$4.24	-0.4%	+36.8%	+56.5%	+76.8%	+60.5%	+37.9%	+63.4%
Price	Feb 13, 26	$100.08	+1.4%	+17.7%	+54.2%	+35.4%	-11.1%	-19.9%	+14.9%
200-Day SMA	Feb 13, 26	$78.64	+0.0%	-0.4%	-9.3%	-1.6%	-42.7%	-25.9%	+20.1%
50-Day SMA	Feb 13, 26	$81.08	+0.8%	+16.5%	+4.8%	+17.3%	-30.2%	-27.3%	-2.4%

1-Year Volatility History

Date	Value	Change
Feb 13, 2026	48.86%	+7.1%
Dec 31, 2025	45.62%	+76.5%
Dec 31, 2024	25.84%	-15.2%
Dec 31, 2023	30.47%	-21.3%
Dec 31, 2022	38.74%	+14.4%
Dec 31, 2021	33.85%	-49.7%
Dec 31, 2020	67.25%	+75.7%
Dec 31, 2019	38.28%	+23.6%
Dec 31, 2018	30.97%	+26.3%
Dec 31, 2017	24.52%	-34.1%
Dec 31, 2016	37.20%	+7.3%
Dec 31, 2015	34.68%	+11.8%

Date	Value	Change
Dec 31, 2014	31.01%	+11.7%
Dec 31, 2013	27.75%	-25.6%
Dec 31, 2012	37.29%	-26.7%
Dec 31, 2011	50.84%	+1.4%
Dec 31, 2010	50.14%	-1.3%
Dec 31, 2009	50.81%	-32.8%
Dec 31, 2008	75.62%	+90.4%
Dec 31, 2007	39.72%	+12.2%
Dec 31, 2006	35.41%	-10.0%
Dec 31, 2005	39.35%	+6.0%
Dec 31, 2004	37.13%	-

FAQ

What is the current 1-year volatility of WLK?
As of today, WLK 1-year volatility is 48.90%
What 1-year volatility category does WLK fall into?
Based on its current 1-year historical volatility, WLK falls into the high volatility category
What is WLK 1-year volatility 1-year high?
WLK 1-year volatility reached a 1-year high of 48.90% on February 13, 2026
What is WLK 1-year volatility 1-year low?
WLK 1-year volatility reached a 1-year low of 24.60% on February 24, 2025

Data Sources & References

WLK Official Website www.westlake.com
Most Recent Quarterly Report (10-Q) www.sec.gov/Archives/edgar/data/1262823/000126282325000064/0001262823-25-000064-index.htm
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/1262823/000126282325000011/0001262823-25-000011-index.htm
WLK Profile on Yahoo Finance finance.yahoo.com/quote/WLK
WLK Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/wlk