What is the current 10-day volatility of HEI.A?

As of today, HEI.A 10-day volatility is 26.17%

What 10-day volatility category does HEI.A fall into?

Based on its current 10-day historical volatility, HEI.A falls into the moderate volatility category

What is HEI.A 10-day volatility 1-year high?

HEI.A 10-day volatility reached a 1-year high of 71.77% on June 10, 2026

What is HEI.A 10-day volatility 1-year low?

HEI.A 10-day volatility reached a 1-year low of 12.55% on October 6, 2025

What is the current 1-month volatility of HEI.A?

As of today, HEI.A 1-month volatility is 22.61%

What 1-month volatility category does HEI.A fall into?

Based on its current 1-month historical volatility, HEI.A falls into the low volatility category

What is HEI.A 1-month volatility 1-year high?

HEI.A 1-month volatility reached a 1-year high of 56.39% on June 22, 2026

What is HEI.A 1-month volatility 1-year low?

HEI.A 1-month volatility reached a 1-year low of 15.96% on October 2, 2025

What is the current 3-month volatility of HEI.A?

As of today, HEI.A 3-month volatility is 21.85%

What 3-month volatility category does HEI.A fall into?

Based on its current 3-month historical volatility, HEI.A falls into the low volatility category

What is HEI.A 3-month volatility 1-year high?

HEI.A 3-month volatility reached a 1-year high of 41.96% on June 11, 2026

What is HEI.A 3-month volatility 1-year low?

HEI.A 3-month volatility reached a 1-year low of 19.55% on December 2, 2025

What is the current 1-year volatility of HEI.A?

As of today, HEI.A 1-year volatility is 29.68%

What 1-year volatility category does HEI.A fall into?

Based on its current 1-year historical volatility, HEI.A falls into the moderate volatility category

What is HEI.A 1-year volatility 1-year high?

HEI.A 1-year volatility reached a 1-year high of 31.90% on July 31, 2026

What is HEI.A 1-year volatility 1-year low?

HEI.A 1-year volatility reached a 1-year low of 27.88% on April 9, 2026

HEI.A Stock Volatility History & Chart Since 1998

10-Day

26.17%

September 25, 2026

Summary

Current Value: As of today, HEI.A 10-day volatility is 26.17%, down -0.68% on September 25, 2026
Value Category: Based on its current 10-day historical volatility, HEI.A falls into the moderate volatility category
1-Year High: HEI.A 10-day volatility reached a 1-year high of 71.77% on June 10, 2026
1-Year Low: HEI.A 10-day volatility reached a 1-year low of 12.55% on October 6, 2025

10-Day Volatility Chart

Performance

HEI.A Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Sep 25, 26	26.17%	-0.7%	+4.7%	-35.4%	-27.5%	+27.0%	+35.0%	+11.6%
1-Month Volatility	Sep 25, 26	22.61%	+8.6%	-1.4%	-58.4%	-22.4%	-45.6%	+31.8%	+4.9%
3-Month Volatility	Sep 25, 26	21.85%	-7.6%	-39.8%	-47.5%	-9.3%	-31.3%	+34.0%	-9.4%
1-Year Volatility	Sep 25, 26	29.68%	+0.2%	-5.2%	-6.7%	-3.6%	-6.2%	+13.7%	-4.4%
14-Day RSI	Sep 25, 26	42.47	+11.1%	-5.4%	-34.5%	-20.1%	-14.8%	+34.5%	-32.3%
Beta	Sep 25, 26	1.07	+0.9%	-1.8%	-6.1%	+59.7%	+52.9%	+23.0%	-9.3%
ATR	Sep 25, 26	$6.08	-2.1%	-9.2%	-31.5%	+15.9%	+7.5%	+159.9%	+132.8%
Price	Sep 25, 26	$232.02	+1.1%	-9.8%	-9.9%	-8.1%	-7.3%	+82.3%	+92.8%
200-Day SMA	Sep 25, 26	$242.24	-0.0%	-0.5%	+0.4%	+2.0%	+10.8%	+82.1%	+100.8%
50-Day SMA	Sep 25, 26	$249.20	-0.1%	-3.1%	+9.0%	+0.9%	-0.3%	+83.7%	+111.6%
20-Day SMA	Sep 25, 26	$232.72	-0.4%	-11.9%	-5.8%	-6.5%	-7.4%	+75.3%	+103.6%

10-Day Volatility History

Date	Value	Change
Sep 25, 2026	26.17%	-27.5%
Dec 31, 2025	36.08%	-19.6%
Dec 31, 2024	44.86%	+42.2%
Dec 31, 2023	31.54%	-12.8%
Dec 31, 2022	36.19%	+43.7%
Dec 31, 2021	25.19%	+16.0%
Dec 31, 2020	21.72%	-21.6%
Dec 31, 2019	27.72%	-39.4%
Dec 31, 2018	45.71%	+45.0%
Dec 31, 2017	31.53%	+74.0%
Dec 31, 2016	18.12%	-55.5%
Dec 31, 2015	40.72%	+24.0%
Dec 31, 2014	32.85%	+53.9%
Dec 31, 2013	21.35%	-0.4%
Dec 31, 2012	21.43%	-45.4%

Date	Value	Change
Dec 31, 2011	39.24%	+173.4%
Dec 31, 2010	14.35%	-58.7%
Dec 31, 2009	34.78%	-63.0%
Dec 31, 2008	94.06%	-11.8%
Dec 31, 2007	106.69%	+194.4%
Dec 31, 2006	36.24%	-28.5%
Dec 31, 2005	50.68%	+158.8%
Dec 31, 2004	19.58%	-2.1%
Dec 31, 2003	20.00%	-71.1%
Dec 31, 2002	69.18%	+9.7%
Dec 31, 2001	63.08%	-29.3%
Dec 31, 2000	89.25%	+16.6%
Dec 31, 1999	76.57%	+53.1%
Dec 31, 1998	50.01%	-

FAQ

What is the current 10-day volatility of HEI.A?: As of today, HEI.A 10-day volatility is 26.17%
What 10-day volatility category does HEI.A fall into?: Based on its current 10-day historical volatility, HEI.A falls into the moderate volatility category
What is HEI.A 10-day volatility 1-year high?: HEI.A 10-day volatility reached a 1-year high of 71.77% on June 10, 2026
What is HEI.A 10-day volatility 1-year low?: HEI.A 10-day volatility reached a 1-year low of 12.55% on October 6, 2025

1-Month

22.61%

September 25, 2026

Summary

Current Value: As of today, HEI.A 1-month volatility is 22.61%, up +8.60% on September 25, 2026
Value Category: Based on its current 1-month historical volatility, HEI.A falls into the low volatility category
1-Year High: HEI.A 1-month volatility reached a 1-year high of 56.39% on June 22, 2026
1-Year Low: HEI.A 1-month volatility reached a 1-year low of 15.96% on October 2, 2025

Performance

HEI.A Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Sep 25, 26	22.61%	+8.6%	-1.4%	-58.4%	-22.4%	-45.6%	+31.8%	+4.9%
10-Day Volatility	Sep 25, 26	26.17%	-0.7%	+4.7%	-35.4%	-27.5%	+27.0%	+35.0%	+11.6%
3-Month Volatility	Sep 25, 26	21.85%	-7.6%	-39.8%	-47.5%	-9.3%	-31.3%	+34.0%	-9.4%
1-Year Volatility	Sep 25, 26	29.68%	+0.2%	-5.2%	-6.7%	-3.6%	-6.2%	+13.7%	-4.4%
14-Day RSI	Sep 25, 26	42.47	+11.1%	-5.4%	-34.5%	-20.1%	-14.8%	+34.5%	-32.3%
Beta	Sep 25, 26	1.07	+0.9%	-1.8%	-6.1%	+59.7%	+52.9%	+23.0%	-9.3%
ATR	Sep 25, 26	$6.08	-2.1%	-9.2%	-31.5%	+15.9%	+7.5%	+159.9%	+132.8%
Price	Sep 25, 26	$232.02	+1.1%	-9.8%	-9.9%	-8.1%	-7.3%	+82.3%	+92.8%
200-Day SMA	Sep 25, 26	$242.24	-0.0%	-0.5%	+0.4%	+2.0%	+10.8%	+82.1%	+100.8%
50-Day SMA	Sep 25, 26	$249.20	-0.1%	-3.1%	+9.0%	+0.9%	-0.3%	+83.7%	+111.6%
20-Day SMA	Sep 25, 26	$232.72	-0.4%	-11.9%	-5.8%	-6.5%	-7.4%	+75.3%	+103.6%

1-Month Volatility History

Date	Value	Change
Sep 25, 2026	21.54%	-26.1%
Dec 31, 2025	29.13%	-18.0%
Dec 31, 2024	35.53%	+20.1%
Dec 31, 2023	29.59%	+4.4%
Dec 31, 2022	28.33%	-17.6%
Dec 31, 2021	34.37%	+16.5%
Dec 31, 2020	29.51%	-0.3%
Dec 31, 2019	29.60%	-23.1%
Dec 31, 2018	38.47%	+59.6%
Dec 31, 2017	24.10%	-4.9%
Dec 31, 2016	25.33%	-23.8%
Dec 31, 2015	33.24%	-3.3%
Dec 31, 2014	34.37%	+48.1%
Dec 31, 2013	23.20%	-3.4%
Dec 31, 2012	24.01%	-33.1%

Date	Value	Change
Dec 31, 2011	35.91%	+38.4%
Dec 31, 2010	25.94%	-10.0%
Dec 31, 2009	28.83%	-64.5%
Dec 31, 2008	81.24%	-5.8%
Dec 31, 2007	86.28%	+227.7%
Dec 31, 2006	26.33%	-33.2%
Dec 31, 2005	39.44%	+40.3%
Dec 31, 2004	28.11%	+46.3%
Dec 31, 2003	19.22%	-63.2%
Dec 31, 2002	52.21%	+14.6%
Dec 31, 2001	45.54%	-41.0%
Dec 31, 2000	77.22%	+31.9%
Dec 31, 1999	58.55%	+53.5%
Dec 31, 1998	38.14%	-

FAQ

What is the current 1-month volatility of HEI.A?: As of today, HEI.A 1-month volatility is 22.61%
What 1-month volatility category does HEI.A fall into?: Based on its current 1-month historical volatility, HEI.A falls into the low volatility category
What is HEI.A 1-month volatility 1-year high?: HEI.A 1-month volatility reached a 1-year high of 56.39% on June 22, 2026
What is HEI.A 1-month volatility 1-year low?: HEI.A 1-month volatility reached a 1-year low of 15.96% on October 2, 2025

3-Month

21.85%

September 25, 2026

Summary

Current Value: As of today, HEI.A 3-month volatility is 21.85%, down -7.61% on September 25, 2026
Value Category: Based on its current 3-month historical volatility, HEI.A falls into the low volatility category
1-Year High: HEI.A 3-month volatility reached a 1-year high of 41.96% on June 11, 2026
1-Year Low: HEI.A 3-month volatility reached a 1-year low of 19.55% on December 2, 2025

Performance

HEI.A Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Sep 25, 26	21.85%	-7.6%	-39.8%	-47.5%	-9.3%	-31.3%	+34.0%	-9.4%
10-Day Volatility	Sep 25, 26	26.17%	-0.7%	+4.7%	-35.4%	-27.5%	+27.0%	+35.0%	+11.6%
1-Month Volatility	Sep 25, 26	22.61%	+8.6%	-1.4%	-58.4%	-22.4%	-45.6%	+31.8%	+4.9%
1-Year Volatility	Sep 25, 26	29.68%	+0.2%	-5.2%	-6.7%	-3.6%	-6.2%	+13.7%	-4.4%
14-Day RSI	Sep 25, 26	42.47	+11.1%	-5.4%	-34.5%	-20.1%	-14.8%	+34.5%	-32.3%
Beta	Sep 25, 26	1.07	+0.9%	-1.8%	-6.1%	+59.7%	+52.9%	+23.0%	-9.3%
ATR	Sep 25, 26	$6.08	-2.1%	-9.2%	-31.5%	+15.9%	+7.5%	+159.9%	+132.8%
Price	Sep 25, 26	$232.02	+1.1%	-9.8%	-9.9%	-8.1%	-7.3%	+82.3%	+92.8%
200-Day SMA	Sep 25, 26	$242.24	-0.0%	-0.5%	+0.4%	+2.0%	+10.8%	+82.1%	+100.8%
50-Day SMA	Sep 25, 26	$249.20	-0.1%	-3.1%	+9.0%	+0.9%	-0.3%	+83.7%	+111.6%
20-Day SMA	Sep 25, 26	$232.72	-0.4%	-11.9%	-5.8%	-6.5%	-7.4%	+75.3%	+103.6%

3-Month Volatility History

Date	Value	Change
Sep 25, 2026	21.75%	-9.1%
Dec 31, 2025	23.93%	-13.7%
Dec 31, 2024	27.73%	+25.8%
Dec 31, 2023	22.04%	-26.8%
Dec 31, 2022	30.11%	-1.1%
Dec 31, 2021	30.45%	-23.2%
Dec 31, 2020	39.66%	+64.4%
Dec 31, 2019	24.12%	-31.6%
Dec 31, 2018	35.25%	+66.6%
Dec 31, 2017	21.16%	+13.5%
Dec 31, 2016	18.64%	-30.2%
Dec 31, 2015	26.70%	+0.8%
Dec 31, 2014	26.49%	-1.0%
Dec 31, 2013	26.75%	+27.3%
Dec 31, 2012	21.02%	-55.5%

Date	Value	Change
Dec 31, 2011	47.26%	+82.0%
Dec 31, 2010	25.96%	-17.5%
Dec 31, 2009	31.46%	-58.2%
Dec 31, 2008	75.21%	+31.5%
Dec 31, 2007	57.21%	+121.3%
Dec 31, 2006	25.85%	-13.0%
Dec 31, 2005	29.71%	+9.2%
Dec 31, 2004	27.20%	-14.1%
Dec 31, 2003	31.66%	-44.6%
Dec 31, 2002	57.10%	+11.2%
Dec 31, 2001	51.34%	-13.5%
Dec 31, 2000	59.32%	+5.3%
Dec 31, 1999	56.36%	+7.4%
Dec 31, 1998	52.50%	-

FAQ

What is the current 3-month volatility of HEI.A?: As of today, HEI.A 3-month volatility is 21.85%
What 3-month volatility category does HEI.A fall into?: Based on its current 3-month historical volatility, HEI.A falls into the low volatility category
What is HEI.A 3-month volatility 1-year high?: HEI.A 3-month volatility reached a 1-year high of 41.96% on June 11, 2026
What is HEI.A 3-month volatility 1-year low?: HEI.A 3-month volatility reached a 1-year low of 19.55% on December 2, 2025

1-Year

29.68%

September 25, 2026

Summary

Current Value: As of today, HEI.A 1-year volatility is 29.68%, up +0.24% on September 25, 2026
Value Category: Based on its current 1-year historical volatility, HEI.A falls into the moderate volatility category
1-Year High: HEI.A 1-year volatility reached a 1-year high of 31.90% on July 31, 2026
1-Year Low: HEI.A 1-year volatility reached a 1-year low of 27.88% on April 9, 2026

Performance

HEI.A Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Sep 25, 26	29.68%	+0.2%	-5.2%	-6.7%	-3.6%	-6.2%	+13.7%	-4.4%
10-Day Volatility	Sep 25, 26	26.17%	-0.7%	+4.7%	-35.4%	-27.5%	+27.0%	+35.0%	+11.6%
1-Month Volatility	Sep 25, 26	22.61%	+8.6%	-1.4%	-58.4%	-22.4%	-45.6%	+31.8%	+4.9%
3-Month Volatility	Sep 25, 26	21.85%	-7.6%	-39.8%	-47.5%	-9.3%	-31.3%	+34.0%	-9.4%
1-Year Volatility	Sep 25, 26	29.68%	+0.2%	-5.2%	-6.7%	-3.6%	-6.2%	+13.7%	-4.4%
14-Day RSI	Sep 25, 26	42.47	+11.1%	-5.4%	-34.5%	-20.1%	-14.8%	+34.5%	-32.3%
Beta	Sep 25, 26	1.07	+0.9%	-1.8%	-6.1%	+59.7%	+52.9%	+23.0%	-9.3%
ATR	Sep 25, 26	$6.08	-2.1%	-9.2%	-31.5%	+15.9%	+7.5%	+159.9%	+132.8%
Price	Sep 25, 26	$232.02	+1.1%	-9.8%	-9.9%	-8.1%	-7.3%	+82.3%	+92.8%
200-Day SMA	Sep 25, 26	$242.24	-0.0%	-0.5%	+0.4%	+2.0%	+10.8%	+82.1%	+100.8%
50-Day SMA	Sep 25, 26	$249.20	-0.1%	-3.1%	+9.0%	+0.9%	-0.3%	+83.7%	+111.6%
20-Day SMA	Sep 25, 26	$232.72	-0.4%	-11.9%	-5.8%	-6.5%	-7.4%	+75.3%	+103.6%

1-Year Volatility History

Date	Value	Change
Sep 25, 2026	29.63%	-3.7%
Dec 31, 2025	30.78%	+39.3%
Dec 31, 2024	22.10%	-8.2%
Dec 31, 2023	24.08%	-16.8%
Dec 31, 2022	28.95%	+2.3%
Dec 31, 2021	28.30%	-48.8%
Dec 31, 2020	55.32%	+116.7%
Dec 31, 2019	25.53%	-11.8%
Dec 31, 2018	28.93%	+47.3%
Dec 31, 2017	19.64%	-9.7%
Dec 31, 2016	21.76%	-21.1%
Dec 31, 2015	27.59%	+4.7%
Dec 31, 2014	26.35%	+3.7%
Dec 31, 2013	25.42%	+3.0%
Dec 31, 2012	24.67%	-44.3%

Date	Value	Change
Dec 31, 2011	44.32%	+25.2%
Dec 31, 2010	35.39%	-20.6%
Dec 31, 2009	44.56%	-16.7%
Dec 31, 2008	53.47%	+32.9%
Dec 31, 2007	40.23%	+32.6%
Dec 31, 2006	30.33%	+20.9%
Dec 31, 2005	25.08%	-27.3%
Dec 31, 2004	34.49%	-16.7%
Dec 31, 2003	41.39%	-7.6%
Dec 31, 2002	44.78%	-15.0%
Dec 31, 2001	52.70%	-0.5%
Dec 31, 2000	52.98%	+31.0%
Dec 31, 1999	40.43%	-25.6%
Dec 31, 1998	54.31%	-

FAQ

What is the current 1-year volatility of HEI.A?: As of today, HEI.A 1-year volatility is 29.68%
What 1-year volatility category does HEI.A fall into?: Based on its current 1-year historical volatility, HEI.A falls into the moderate volatility category
What is HEI.A 1-year volatility 1-year high?: HEI.A 1-year volatility reached a 1-year high of 31.90% on July 31, 2026
What is HEI.A 1-year volatility 1-year low?: HEI.A 1-year volatility reached a 1-year low of 27.88% on April 9, 2026

Data Sources & References

HEI.A Official Website www.heico.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/46619/000004661925000082/0000046619-25-000082-index.htm
HEI.A Profile on Yahoo Finance finance.yahoo.com/quote/HEI-A
HEI.A Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/hei.a