What is the current 10-day volatility of STM?

As of today, STM 10-day volatility is 29.15%

What 10-day volatility category does STM fall into?

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

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

STM 10-day volatility reached a 1-year high of 122.82% on August 3, 2026

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

STM 10-day volatility reached a 1-year low of 11.30% on December 31, 2025

What is the current 1-month volatility of STM?

As of today, STM 1-month volatility is 37.78%

What 1-month volatility category does STM fall into?

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

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

STM 1-month volatility reached a 1-year high of 98.12% on June 29, 2026

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

STM 1-month volatility reached a 1-year low of 24.60% on January 2, 2026

What is the current 3-month volatility of STM?

As of today, STM 3-month volatility is 64.64%

What 3-month volatility category does STM fall into?

Based on its current 3-month historical volatility, STM falls into the extreme volatility category

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

STM 3-month volatility reached a 1-year high of 85.91% on July 31, 2026

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

STM 3-month volatility reached a 1-year low of 37.11% on January 26, 2026

What is the current 1-year volatility of STM?

As of today, STM 1-year volatility is 60.15%

What 1-year volatility category does STM fall into?

Based on its current 1-year historical volatility, STM falls into the extreme volatility category

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

STM 1-year volatility reached a 1-year high of 60.17% on September 14, 2026

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

STM 1-year volatility reached a 1-year low of 47.61% on April 13, 2026

STM Stock Volatility History & Chart Since 1994

10-Day

29.15%

September 29, 2026

Summary

Current Value: As of today, STM 10-day volatility is 29.15%, down -0.92% on September 29, 2026
Value Category: Based on its current 10-day historical volatility, STM falls into the moderate volatility category
1-Year High: STM 10-day volatility reached a 1-year high of 122.82% on August 3, 2026
1-Year Low: STM 10-day volatility reached a 1-year low of 11.30% on December 31, 2025

10-Day Volatility Chart

Performance

STM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Sep 29, 26	29.15%	-0.9%	-40.8%	-63.9%	+158.0%	-11.3%	+66.9%	-19.0%
1-Month Volatility	Sep 29, 26	37.78%	-2.4%	-15.9%	-60.5%	+20.7%	+14.7%	+84.9%	+32.1%
3-Month Volatility	Sep 29, 26	64.64%	-0.4%	-21.0%	-10.5%	+44.5%	+37.3%	+123.2%	+128.7%
1-Year Volatility	Sep 29, 26	60.15%	+0.2%	+0.4%	+8.1%	+10.8%	+16.2%	+54.1%	+56.5%
14-Day RSI	Sep 29, 26	55.23	+2.9%	+42.8%	+1.3%	-1.5%	-2.9%	+38.1%	+25.8%
Beta	Sep 29, 26	2.66	0.0%	-1.9%	+9.5%	+47.8%	+53.8%	+67.3%	+61.2%
ATR	Sep 29, 26	$1.75	-0.7%	-27.0%	-59.4%	+236.5%	+135.3%	+79.4%	+84.8%
Price	Sep 29, 26	$53.24	+0.9%	+7.8%	-28.9%	+105.2%	+88.4%	+23.4%	+22.0%
200-Day SMA	Sep 29, 26	$47.47	+0.3%	+6.4%	+24.3%	+82.3%	+84.1%	+2.6%	+20.6%
50-Day SMA	Sep 29, 26	$52.22	-0.3%	-13.6%	-20.0%	+110.7%	+94.7%	+11.2%	+20.4%
20-Day SMA	Sep 29, 26	$50.95	+0.3%	-2.8%	-32.4%	+96.0%	+86.6%	+16.2%	+12.4%

10-Day Volatility History

Date	Value	Change
Sep 30, 2026	29.15%	+158.0%
Dec 31, 2025	11.30%	-60.9%
Dec 31, 2024	28.92%	+28.0%
Dec 31, 2023	22.59%	-26.0%
Dec 31, 2022	30.52%	+44.8%
Dec 31, 2021	21.08%	-0.2%
Dec 31, 2020	21.13%	+31.4%
Dec 31, 2019	16.08%	-53.7%
Dec 31, 2018	34.73%	+48.2%
Dec 31, 2017	23.43%	+47.8%
Dec 31, 2016	15.85%	-7.8%
Dec 31, 2015	17.19%	-33.8%
Dec 31, 2014	25.96%	-20.1%
Dec 31, 2013	32.50%	+61.4%
Dec 31, 2012	20.14%	-62.6%
Dec 31, 2011	53.87%	+199.8%
Dec 31, 2010	17.97%	-23.0%

Date	Value	Change
Dec 31, 2009	23.34%	-31.4%
Dec 31, 2008	34.03%	+177.6%
Dec 31, 2007	12.26%	+20.0%
Dec 31, 2006	10.22%	-31.1%
Dec 31, 2005	14.84%	-8.6%
Dec 31, 2004	16.23%	-31.2%
Dec 31, 2003	23.59%	-44.4%
Dec 31, 2002	42.44%	-6.9%
Dec 31, 2001	45.57%	-9.6%
Dec 31, 2000	50.39%	+83.2%
Dec 31, 1999	27.50%	-43.7%
Dec 31, 1998	48.85%	-15.5%
Dec 31, 1997	57.81%	+100.0%
Dec 31, 1996	28.91%	-67.4%
Dec 31, 1995	88.75%	+582.7%
Dec 31, 1994	13.00%	-

FAQ

What is the current 10-day volatility of STM?: As of today, STM 10-day volatility is 29.15%
What 10-day volatility category does STM fall into?: Based on its current 10-day historical volatility, STM falls into the moderate volatility category
What is STM 10-day volatility 1-year high?: STM 10-day volatility reached a 1-year high of 122.82% on August 3, 2026
What is STM 10-day volatility 1-year low?: STM 10-day volatility reached a 1-year low of 11.30% on December 31, 2025

1-Month

37.78%

September 29, 2026

Summary

Current Value: As of today, STM 1-month volatility is 37.78%, down -2.38% on September 29, 2026
Value Category: Based on its current 1-month historical volatility, STM falls into the moderate volatility category
1-Year High: STM 1-month volatility reached a 1-year high of 98.12% on June 29, 2026
1-Year Low: STM 1-month volatility reached a 1-year low of 24.60% on January 2, 2026

Performance

STM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Sep 29, 26	37.78%	-2.4%	-15.9%	-60.5%	+20.7%	+14.7%	+84.9%	+32.1%
10-Day Volatility	Sep 29, 26	29.15%	-0.9%	-40.8%	-63.9%	+158.0%	-11.3%	+66.9%	-19.0%
3-Month Volatility	Sep 29, 26	64.64%	-0.4%	-21.0%	-10.5%	+44.5%	+37.3%	+123.2%	+128.7%
1-Year Volatility	Sep 29, 26	60.15%	+0.2%	+0.4%	+8.1%	+10.8%	+16.2%	+54.1%	+56.5%
14-Day RSI	Sep 29, 26	55.23	+2.9%	+42.8%	+1.3%	-1.5%	-2.9%	+38.1%	+25.8%
Beta	Sep 29, 26	2.66	0.0%	-1.9%	+9.5%	+47.8%	+53.8%	+67.3%	+61.2%
ATR	Sep 29, 26	$1.75	-0.7%	-27.0%	-59.4%	+236.5%	+135.3%	+79.4%	+84.8%
Price	Sep 29, 26	$53.24	+0.9%	+7.8%	-28.9%	+105.2%	+88.4%	+23.4%	+22.0%
200-Day SMA	Sep 29, 26	$47.47	+0.3%	+6.4%	+24.3%	+82.3%	+84.1%	+2.6%	+20.6%
50-Day SMA	Sep 29, 26	$52.22	-0.3%	-13.6%	-20.0%	+110.7%	+94.7%	+11.2%	+20.4%
20-Day SMA	Sep 29, 26	$50.95	+0.3%	-2.8%	-32.4%	+96.0%	+86.6%	+16.2%	+12.4%

1-Month Volatility History

Date	Value	Change
Sep 30, 2026	37.78%	+23.7%
Dec 31, 2025	30.54%	+25.2%
Dec 31, 2024	24.40%	+26.0%
Dec 31, 2023	19.37%	-37.0%
Dec 31, 2022	30.75%	-21.2%
Dec 31, 2021	39.04%	-34.4%
Dec 31, 2020	59.52%	+200.9%
Dec 31, 2019	19.78%	-58.3%
Dec 31, 2018	47.38%	+100.4%
Dec 31, 2017	23.64%	-7.7%
Dec 31, 2016	25.62%	-0.2%
Dec 31, 2015	25.68%	-9.0%
Dec 31, 2014	28.22%	-13.1%
Dec 31, 2013	32.47%	+40.9%
Dec 31, 2012	23.05%	-48.0%
Dec 31, 2011	44.31%	+41.0%
Dec 31, 2010	31.42%	+50.0%

Date	Value	Change
Dec 31, 2009	20.94%	-63.2%
Dec 31, 2008	56.91%	+185.1%
Dec 31, 2007	19.96%	+35.6%
Dec 31, 2006	14.72%	-30.4%
Dec 31, 2005	21.15%	+21.6%
Dec 31, 2004	17.40%	-29.4%
Dec 31, 2003	24.64%	-55.0%
Dec 31, 2002	54.77%	-22.4%
Dec 31, 2001	70.57%	-0.9%
Dec 31, 2000	71.22%	+59.5%
Dec 31, 1999	44.66%	-25.3%
Dec 31, 1998	59.82%	-22.8%
Dec 31, 1997	77.47%	+129.9%
Dec 31, 1996	33.69%	-53.2%
Dec 31, 1995	71.96%	+321.3%
Dec 31, 1994	17.08%	-

FAQ

What is the current 1-month volatility of STM?: As of today, STM 1-month volatility is 37.78%
What 1-month volatility category does STM fall into?: Based on its current 1-month historical volatility, STM falls into the moderate volatility category
What is STM 1-month volatility 1-year high?: STM 1-month volatility reached a 1-year high of 98.12% on June 29, 2026
What is STM 1-month volatility 1-year low?: STM 1-month volatility reached a 1-year low of 24.60% on January 2, 2026

3-Month

64.64%

September 29, 2026

Summary

Current Value: As of today, STM 3-month volatility is 64.64%, down -0.39% on September 29, 2026
Value Category: Based on its current 3-month historical volatility, STM falls into the extreme volatility category
1-Year High: STM 3-month volatility reached a 1-year high of 85.91% on July 31, 2026
1-Year Low: STM 3-month volatility reached a 1-year low of 37.11% on January 26, 2026

Performance

STM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Sep 29, 26	64.64%	-0.4%	-21.0%	-10.5%	+44.5%	+37.3%	+123.2%	+128.7%
10-Day Volatility	Sep 29, 26	29.15%	-0.9%	-40.8%	-63.9%	+158.0%	-11.3%	+66.9%	-19.0%
1-Month Volatility	Sep 29, 26	37.78%	-2.4%	-15.9%	-60.5%	+20.7%	+14.7%	+84.9%	+32.1%
1-Year Volatility	Sep 29, 26	60.15%	+0.2%	+0.4%	+8.1%	+10.8%	+16.2%	+54.1%	+56.5%
14-Day RSI	Sep 29, 26	55.23	+2.9%	+42.8%	+1.3%	-1.5%	-2.9%	+38.1%	+25.8%
Beta	Sep 29, 26	2.66	0.0%	-1.9%	+9.5%	+47.8%	+53.8%	+67.3%	+61.2%
ATR	Sep 29, 26	$1.75	-0.7%	-27.0%	-59.4%	+236.5%	+135.3%	+79.4%	+84.8%
Price	Sep 29, 26	$53.24	+0.9%	+7.8%	-28.9%	+105.2%	+88.4%	+23.4%	+22.0%
200-Day SMA	Sep 29, 26	$47.47	+0.3%	+6.4%	+24.3%	+82.3%	+84.1%	+2.6%	+20.6%
50-Day SMA	Sep 29, 26	$52.22	-0.3%	-13.6%	-20.0%	+110.7%	+94.7%	+11.2%	+20.4%
20-Day SMA	Sep 29, 26	$50.95	+0.3%	-2.8%	-32.4%	+96.0%	+86.6%	+16.2%	+12.4%

3-Month Volatility History

Date	Value	Change
Sep 30, 2026	64.64%	+45.6%
Dec 31, 2025	44.41%	+48.2%
Dec 31, 2024	29.97%	-5.6%
Dec 31, 2023	31.74%	-37.1%
Dec 31, 2022	50.48%	+46.3%
Dec 31, 2021	34.51%	-28.6%
Dec 31, 2020	48.33%	+53.7%
Dec 31, 2019	31.44%	-39.0%
Dec 31, 2018	51.52%	+45.2%
Dec 31, 2017	35.49%	+4.5%
Dec 31, 2016	33.97%	+18.0%
Dec 31, 2015	28.78%	-25.5%
Dec 31, 2014	38.62%	+19.2%
Dec 31, 2013	32.40%	-13.8%
Dec 31, 2012	37.60%	-40.0%
Dec 31, 2011	62.64%	+87.0%
Dec 31, 2010	33.49%	-6.1%

Date	Value	Change
Dec 31, 2009	35.67%	-56.1%
Dec 31, 2008	81.27%	+208.1%
Dec 31, 2007	26.38%	+36.3%
Dec 31, 2006	19.36%	-17.1%
Dec 31, 2005	23.34%	+0.3%
Dec 31, 2004	23.28%	-20.3%
Dec 31, 2003	29.21%	-67.1%
Dec 31, 2002	88.67%	+41.0%
Dec 31, 2001	62.87%	-18.8%
Dec 31, 2000	77.47%	+43.0%
Dec 31, 1999	54.16%	-18.0%
Dec 31, 1998	66.08%	+2.5%
Dec 31, 1997	64.44%	+60.0%
Dec 31, 1996	40.27%	-32.0%
Dec 31, 1995	59.21%	+246.7%
Dec 31, 1994	17.08%	-

FAQ

What is the current 3-month volatility of STM?: As of today, STM 3-month volatility is 64.64%
What 3-month volatility category does STM fall into?: Based on its current 3-month historical volatility, STM falls into the extreme volatility category
What is STM 3-month volatility 1-year high?: STM 3-month volatility reached a 1-year high of 85.91% on July 31, 2026
What is STM 3-month volatility 1-year low?: STM 3-month volatility reached a 1-year low of 37.11% on January 26, 2026

1-Year

60.15%

September 29, 2026

Summary

Current Value: As of today, STM 1-year volatility is 60.15%, up +0.22% on September 29, 2026
Value Category: Based on its current 1-year historical volatility, STM falls into the extreme volatility category
1-Year High: STM 1-year volatility reached a 1-year high of 60.17% on September 14, 2026
1-Year Low: STM 1-year volatility reached a 1-year low of 47.61% on April 13, 2026

Performance

STM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Sep 29, 26	60.15%	+0.2%	+0.4%	+8.1%	+10.8%	+16.2%	+54.1%	+56.5%
10-Day Volatility	Sep 29, 26	29.15%	-0.9%	-40.8%	-63.9%	+158.0%	-11.3%	+66.9%	-19.0%
1-Month Volatility	Sep 29, 26	37.78%	-2.4%	-15.9%	-60.5%	+20.7%	+14.7%	+84.9%	+32.1%
3-Month Volatility	Sep 29, 26	64.64%	-0.4%	-21.0%	-10.5%	+44.5%	+37.3%	+123.2%	+128.7%
1-Year Volatility	Sep 29, 26	60.15%	+0.2%	+0.4%	+8.1%	+10.8%	+16.2%	+54.1%	+56.5%
14-Day RSI	Sep 29, 26	55.23	+2.9%	+42.8%	+1.3%	-1.5%	-2.9%	+38.1%	+25.8%
Beta	Sep 29, 26	2.66	0.0%	-1.9%	+9.5%	+47.8%	+53.8%	+67.3%	+61.2%
ATR	Sep 29, 26	$1.75	-0.7%	-27.0%	-59.4%	+236.5%	+135.3%	+79.4%	+84.8%
Price	Sep 29, 26	$53.24	+0.9%	+7.8%	-28.9%	+105.2%	+88.4%	+23.4%	+22.0%
200-Day SMA	Sep 29, 26	$47.47	+0.3%	+6.4%	+24.3%	+82.3%	+84.1%	+2.6%	+20.6%
50-Day SMA	Sep 29, 26	$52.22	-0.3%	-13.6%	-20.0%	+110.7%	+94.7%	+11.2%	+20.4%
20-Day SMA	Sep 29, 26	$50.95	+0.3%	-2.8%	-32.4%	+96.0%	+86.6%	+16.2%	+12.4%

1-Year Volatility History

Date	Value	Change
Sep 30, 2026	60.15%	+10.8%
Dec 31, 2025	54.29%	+41.2%
Dec 31, 2024	38.46%	+13.9%
Dec 31, 2023	33.76%	-29.2%
Dec 31, 2022	47.68%	+38.3%
Dec 31, 2021	34.47%	-43.2%
Dec 31, 2020	60.66%	+46.2%
Dec 31, 2019	41.48%	+4.1%
Dec 31, 2018	39.85%	+20.5%
Dec 31, 2017	33.06%	-17.0%
Dec 31, 2016	39.84%	+11.9%
Dec 31, 2015	35.60%	+14.5%
Dec 31, 2014	31.09%	-12.1%
Dec 31, 2013	35.37%	-24.4%
Dec 31, 2012	46.79%	-11.5%
Dec 31, 2011	52.87%	+43.4%
Dec 31, 2010	36.87%	-31.5%

Date	Value	Change
Dec 31, 2009	53.80%	-2.1%
Dec 31, 2008	54.93%	+102.6%
Dec 31, 2007	27.11%	+2.2%
Dec 31, 2006	26.53%	+3.8%
Dec 31, 2005	25.55%	-7.6%
Dec 31, 2004	27.64%	-32.3%
Dec 31, 2003	40.81%	-37.3%
Dec 31, 2002	65.10%	+1.4%
Dec 31, 2001	64.21%	-12.5%
Dec 31, 2000	73.42%	+25.5%
Dec 31, 1999	58.52%	-1.9%
Dec 31, 1998	59.68%	+22.4%
Dec 31, 1997	48.76%	+5.0%
Dec 31, 1996	46.46%	-2.2%
Dec 31, 1995	47.49%	+178.0%
Dec 31, 1994	17.08%	-

FAQ

What is the current 1-year volatility of STM?: As of today, STM 1-year volatility is 60.15%
What 1-year volatility category does STM fall into?: Based on its current 1-year historical volatility, STM falls into the extreme volatility category
What is STM 1-year volatility 1-year high?: STM 1-year volatility reached a 1-year high of 60.17% on September 14, 2026
What is STM 1-year volatility 1-year low?: STM 1-year volatility reached a 1-year low of 47.61% on April 13, 2026

Data Sources & References

STM Official Website www.st.com/content/st_com/en.html
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/932787/000093278726000009/0000932787-26-000009-index.htm
STM Profile on Yahoo Finance finance.yahoo.com/quote/STM
STM Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/stm