What is the current 10-day volatility of WLK?

As of today, WLK 10-day volatility is 27.37%

What 10-day volatility category does WLK fall into?

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

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

WLK 10-day volatility reached a 1-year high of 85.00% on August 5, 2026

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

WLK 10-day volatility reached a 1-year low of 8.92% on June 3, 2026

What is the current 1-month volatility of WLK?

As of today, WLK 1-month volatility is 27.47%

What 1-month volatility category does WLK fall into?

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

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

WLK 1-month volatility reached a 1-year high of 69.16% on February 27, 2026

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

WLK 1-month volatility reached a 1-year low of 19.49% on August 3, 2026

What is the current 3-month volatility of WLK?

As of today, WLK 3-month volatility is 40.37%

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 54.35% on March 24, 2026

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

WLK 3-month volatility reached a 1-year low of 32.07% on August 3, 2026

What is the current 1-year volatility of WLK?

As of today, WLK 1-year volatility is 44.08%

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 51.52% on March 24, 2026

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

WLK 1-year volatility reached a 1-year low of 41.61% on September 26, 2025

WLK Stock Volatility History & Chart Since 2004

10-Day

27.37%

September 25, 2026

Summary

Current Value: As of today, WLK 10-day volatility is 27.37%, up +7.50% on September 25, 2026
Value Category: Based on its current 10-day historical volatility, WLK falls into the moderate volatility category
1-Year High: WLK 10-day volatility reached a 1-year high of 85.00% on August 5, 2026
1-Year Low: WLK 10-day volatility reached a 1-year low of 8.92% on June 3, 2026

10-Day Volatility Chart

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Sep 25, 26	27.37%	+7.5%	+2.2%	-4.0%	+7.1%	+39.7%	+12.1%	-27.8%
1-Month Volatility	Sep 25, 26	27.47%	+1.0%	-53.7%	+19.6%	-15.8%	-19.7%	+10.2%	-10.9%
3-Month Volatility	Sep 25, 26	40.37%	+1.0%	+2.8%	+10.6%	-4.5%	-20.6%	+62.3%	+26.7%
1-Year Volatility	Sep 25, 26	44.08%	-0.2%	-0.9%	-5.7%	-3.4%	+5.8%	+28.4%	+26.7%
14-Day RSI	Sep 25, 26	35.56	+13.6%	-16.0%	+51.5%	-38.8%	+6.6%	-10.2%	-36.3%
Beta	Sep 25, 26	0.64	0.0%	-7.3%	-21.0%	-47.1%	-41.8%	-46.2%	-50.4%
ATR	Sep 25, 26	$2.25	-0.6%	-14.3%	-24.7%	-6.2%	-26.7%	-21.5%	-11.4%
Price	Sep 25, 26	$67.71	+1.4%	-9.5%	-11.5%	-8.4%	-10.9%	-44.9%	-22.9%
200-Day SMA	Sep 25, 26	$88.49	0.0%	+1.0%	+0.4%	+10.8%	-6.0%	-25.1%	-0.8%
50-Day SMA	Sep 25, 26	$74.40	-0.3%	-3.2%	-21.8%	+7.7%	-11.3%	-42.6%	-11.9%
20-Day SMA	Sep 25, 26	$71.42	-0.4%	-7.3%	-15.0%	-1.4%	-16.2%	-43.7%	-17.3%

10-Day Volatility History

Date	Value	Change
Sep 25, 2026	27.37%	+7.1%
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 27.37%
What 10-day volatility category does WLK fall into?: Based on its current 10-day historical volatility, WLK falls into the moderate volatility category
What is WLK 10-day volatility 1-year high?: WLK 10-day volatility reached a 1-year high of 85.00% on August 5, 2026
What is WLK 10-day volatility 1-year low?: WLK 10-day volatility reached a 1-year low of 8.92% on June 3, 2026

1-Month

27.47%

September 25, 2026

Summary

Current Value: As of today, WLK 1-month volatility is 27.47%, up +0.96% on September 25, 2026
Value Category: Based on its current 1-month historical volatility, WLK falls into the moderate volatility category
1-Year High: WLK 1-month volatility reached a 1-year high of 69.16% on February 27, 2026
1-Year Low: WLK 1-month volatility reached a 1-year low of 19.49% on August 3, 2026

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Sep 25, 26	27.47%	+1.0%	-53.7%	+19.6%	-15.8%	-19.7%	+10.2%	-10.9%
10-Day Volatility	Sep 25, 26	27.37%	+7.5%	+2.2%	-4.0%	+7.1%	+39.7%	+12.1%	-27.8%
3-Month Volatility	Sep 25, 26	40.37%	+1.0%	+2.8%	+10.6%	-4.5%	-20.6%	+62.3%	+26.7%
1-Year Volatility	Sep 25, 26	44.08%	-0.2%	-0.9%	-5.7%	-3.4%	+5.8%	+28.4%	+26.7%
14-Day RSI	Sep 25, 26	35.56	+13.6%	-16.0%	+51.5%	-38.8%	+6.6%	-10.2%	-36.3%
Beta	Sep 25, 26	0.64	0.0%	-7.3%	-21.0%	-47.1%	-41.8%	-46.2%	-50.4%
ATR	Sep 25, 26	$2.25	-0.6%	-14.3%	-24.7%	-6.2%	-26.7%	-21.5%	-11.4%
Price	Sep 25, 26	$67.71	+1.4%	-9.5%	-11.5%	-8.4%	-10.9%	-44.9%	-22.9%
200-Day SMA	Sep 25, 26	$88.49	0.0%	+1.0%	+0.4%	+10.8%	-6.0%	-25.1%	-0.8%
50-Day SMA	Sep 25, 26	$74.40	-0.3%	-3.2%	-21.8%	+7.7%	-11.3%	-42.6%	-11.9%
20-Day SMA	Sep 25, 26	$71.42	-0.4%	-7.3%	-15.0%	-1.4%	-16.2%	-43.7%	-17.3%

1-Month Volatility History

Date	Value	Change
Sep 25, 2026	27.41%	-14.1%
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 27.47%
What 1-month volatility category does WLK fall into?: Based on its current 1-month historical volatility, WLK falls into the moderate volatility category
What is WLK 1-month volatility 1-year high?: WLK 1-month volatility reached a 1-year high of 69.16% on February 27, 2026
What is WLK 1-month volatility 1-year low?: WLK 1-month volatility reached a 1-year low of 19.49% on August 3, 2026

3-Month

40.37%

September 25, 2026

Summary

Current Value: As of today, WLK 3-month volatility is 40.37%, up +0.98% on September 25, 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 54.35% on March 24, 2026
1-Year Low: WLK 3-month volatility reached a 1-year low of 32.07% on August 3, 2026

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Sep 25, 26	40.37%	+1.0%	+2.8%	+10.6%	-4.5%	-20.6%	+62.3%	+26.7%
10-Day Volatility	Sep 25, 26	27.37%	+7.5%	+2.2%	-4.0%	+7.1%	+39.7%	+12.1%	-27.8%
1-Month Volatility	Sep 25, 26	27.47%	+1.0%	-53.7%	+19.6%	-15.8%	-19.7%	+10.2%	-10.9%
1-Year Volatility	Sep 25, 26	44.08%	-0.2%	-0.9%	-5.7%	-3.4%	+5.8%	+28.4%	+26.7%
14-Day RSI	Sep 25, 26	35.56	+13.6%	-16.0%	+51.5%	-38.8%	+6.6%	-10.2%	-36.3%
Beta	Sep 25, 26	0.64	0.0%	-7.3%	-21.0%	-47.1%	-41.8%	-46.2%	-50.4%
ATR	Sep 25, 26	$2.25	-0.6%	-14.3%	-24.7%	-6.2%	-26.7%	-21.5%	-11.4%
Price	Sep 25, 26	$67.71	+1.4%	-9.5%	-11.5%	-8.4%	-10.9%	-44.9%	-22.9%
200-Day SMA	Sep 25, 26	$88.49	0.0%	+1.0%	+0.4%	+10.8%	-6.0%	-25.1%	-0.8%
50-Day SMA	Sep 25, 26	$74.40	-0.3%	-3.2%	-21.8%	+7.7%	-11.3%	-42.6%	-11.9%
20-Day SMA	Sep 25, 26	$71.42	-0.4%	-7.3%	-15.0%	-1.4%	-16.2%	-43.7%	-17.3%

3-Month Volatility History

Date	Value	Change
Sep 25, 2026	40.05%	-4.5%
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 40.37%
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 54.35% on March 24, 2026
What is WLK 3-month volatility 1-year low?: WLK 3-month volatility reached a 1-year low of 32.07% on August 3, 2026

1-Year

44.08%

September 25, 2026

Summary

Current Value: As of today, WLK 1-year volatility is 44.08%, down -0.20% on September 25, 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 51.52% on March 24, 2026
1-Year Low: WLK 1-year volatility reached a 1-year low of 41.61% on September 26, 2025

Performance

WLK Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Sep 25, 26	44.08%	-0.2%	-0.9%	-5.7%	-3.4%	+5.8%	+28.4%	+26.7%
10-Day Volatility	Sep 25, 26	27.37%	+7.5%	+2.2%	-4.0%	+7.1%	+39.7%	+12.1%	-27.8%
1-Month Volatility	Sep 25, 26	27.47%	+1.0%	-53.7%	+19.6%	-15.8%	-19.7%	+10.2%	-10.9%
3-Month Volatility	Sep 25, 26	40.37%	+1.0%	+2.8%	+10.6%	-4.5%	-20.6%	+62.3%	+26.7%
1-Year Volatility	Sep 25, 26	44.08%	-0.2%	-0.9%	-5.7%	-3.4%	+5.8%	+28.4%	+26.7%
14-Day RSI	Sep 25, 26	35.56	+13.6%	-16.0%	+51.5%	-38.8%	+6.6%	-10.2%	-36.3%
Beta	Sep 25, 26	0.64	0.0%	-7.3%	-21.0%	-47.1%	-41.8%	-46.2%	-50.4%
ATR	Sep 25, 26	$2.25	-0.6%	-14.3%	-24.7%	-6.2%	-26.7%	-21.5%	-11.4%
Price	Sep 25, 26	$67.71	+1.4%	-9.5%	-11.5%	-8.4%	-10.9%	-44.9%	-22.9%
200-Day SMA	Sep 25, 26	$88.49	0.0%	+1.0%	+0.4%	+10.8%	-6.0%	-25.1%	-0.8%
50-Day SMA	Sep 25, 26	$74.40	-0.3%	-3.2%	-21.8%	+7.7%	-11.3%	-42.6%	-11.9%
20-Day SMA	Sep 25, 26	$71.42	-0.4%	-7.3%	-15.0%	-1.4%	-16.2%	-43.7%	-17.3%

1-Year Volatility History

Date	Value	Change
Sep 25, 2026	44.04%	-3.5%
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 44.08%
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 51.52% on March 24, 2026
What is WLK 1-year volatility 1-year low?: WLK 1-year volatility reached a 1-year low of 41.61% on September 26, 2025

Data Sources & References

WLK Official Website www.westlake.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/1262823/000126282326000016/0001262823-26-000016-index.htm
WLK Profile on Yahoo Finance finance.yahoo.com/quote/WLK
WLK Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/wlk