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

As of today, HEI.A 10-day volatility is 19.61%

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

Based on its current 10-day historical volatility, HEI.A falls into the low 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 9.83% on August 19, 2025

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

As of today, HEI.A 1-month volatility is 21.81%

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 36.38%

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

Based on its current 3-month historical volatility, HEI.A falls into the moderate 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 31.28%

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 31.91% on August 29, 2025

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

19.61%

August 18, 2026

Summary

Current Value: As of today, HEI.A 10-day volatility is 19.61%, down -3.54% on August 18, 2026
Value Category: Based on its current 10-day historical volatility, HEI.A falls into the low 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 9.83% on August 19, 2025

10-Day Volatility Chart

Performance

HEI.A Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Aug 18, 26	19.61%	-3.5%	-7.7%	-46.7%	-45.6%	-41.9%	+14.9%	-50.0%
1-Month Volatility	Aug 18, 26	21.81%	-1.0%	-19.8%	-37.6%	-25.1%	-20.6%	+25.4%	-26.6%
3-Month Volatility	Aug 18, 26	36.38%	+0.9%	-8.2%	+7.9%	+51.1%	+28.1%	+35.3%	+43.0%
1-Year Volatility	Aug 18, 26	31.28%	+0.2%	-1.1%	+7.5%	+1.6%	+4.8%	+15.4%	-2.7%
14-Day RSI	Aug 18, 26	59.36	-4.5%	+17.3%	+14.6%	+11.7%	+53.3%	+100.4%	+49.0%
Beta	Aug 18, 26	1.07	-0.9%	-5.3%	+1.9%	+59.7%	+55.1%	+18.9%	+0.9%
ATR	Aug 18, 26	$7.02	-0.6%	-20.5%	+6.0%	+33.9%	+24.0%	+193.9%	+149.8%
Price	Aug 18, 26	$268.78	-0.7%	+7.5%	+23.1%	+6.5%	+11.8%	+105.8%	+130.8%
200-Day SMA	Aug 18, 26	$243.10	+0.1%	+0.7%	+0.5%	+2.4%	+14.2%	+84.0%	+101.8%
50-Day SMA	Aug 18, 26	$255.44	+0.2%	+5.7%	+18.1%	+3.4%	+2.9%	+85.6%	+104.9%
20-Day SMA	Aug 18, 26	$262.67	+0.4%	+3.8%	+23.2%	+5.5%	+5.0%	+89.8%	+118.1%

10-Day Volatility History

Date	Value	Change
Aug 18, 2026	19.61%	-45.6%
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 19.61%
What 10-day volatility category does HEI.A fall into?: Based on its current 10-day historical volatility, HEI.A falls into the low 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 9.83% on August 19, 2025

1-Month

21.81%

August 18, 2026

Summary

Current Value: As of today, HEI.A 1-month volatility is 21.81%, down -1.04% on August 18, 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	Aug 18, 26	21.81%	-1.0%	-19.8%	-37.6%	-25.1%	-20.6%	+25.4%	-26.6%
10-Day Volatility	Aug 18, 26	19.61%	-3.5%	-7.7%	-46.7%	-45.6%	-41.9%	+14.9%	-50.0%
3-Month Volatility	Aug 18, 26	36.38%	+0.9%	-8.2%	+7.9%	+51.1%	+28.1%	+35.3%	+43.0%
1-Year Volatility	Aug 18, 26	31.28%	+0.2%	-1.1%	+7.5%	+1.6%	+4.8%	+15.4%	-2.7%
14-Day RSI	Aug 18, 26	59.36	-4.5%	+17.3%	+14.6%	+11.7%	+53.3%	+100.4%	+49.0%
Beta	Aug 18, 26	1.07	-0.9%	-5.3%	+1.9%	+59.7%	+55.1%	+18.9%	+0.9%
ATR	Aug 18, 26	$7.02	-0.6%	-20.5%	+6.0%	+33.9%	+24.0%	+193.9%	+149.8%
Price	Aug 18, 26	$268.78	-0.7%	+7.5%	+23.1%	+6.5%	+11.8%	+105.8%	+130.8%
200-Day SMA	Aug 18, 26	$243.10	+0.1%	+0.7%	+0.5%	+2.4%	+14.2%	+84.0%	+101.8%
50-Day SMA	Aug 18, 26	$255.44	+0.2%	+5.7%	+18.1%	+3.4%	+2.9%	+85.6%	+104.9%
20-Day SMA	Aug 18, 26	$262.67	+0.4%	+3.8%	+23.2%	+5.5%	+5.0%	+89.8%	+118.1%

1-Month Volatility History

Date	Value	Change
Aug 18, 2026	21.81%	-25.1%
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 21.81%
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

36.38%

August 18, 2026

Summary

Current Value: As of today, HEI.A 3-month volatility is 36.38%, up +0.92% on August 18, 2026
Value Category: Based on its current 3-month historical volatility, HEI.A falls into the moderate 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	Aug 18, 26	36.38%	+0.9%	-8.2%	+7.9%	+51.1%	+28.1%	+35.3%	+43.0%
10-Day Volatility	Aug 18, 26	19.61%	-3.5%	-7.7%	-46.7%	-45.6%	-41.9%	+14.9%	-50.0%
1-Month Volatility	Aug 18, 26	21.81%	-1.0%	-19.8%	-37.6%	-25.1%	-20.6%	+25.4%	-26.6%
1-Year Volatility	Aug 18, 26	31.28%	+0.2%	-1.1%	+7.5%	+1.6%	+4.8%	+15.4%	-2.7%
14-Day RSI	Aug 18, 26	59.36	-4.5%	+17.3%	+14.6%	+11.7%	+53.3%	+100.4%	+49.0%
Beta	Aug 18, 26	1.07	-0.9%	-5.3%	+1.9%	+59.7%	+55.1%	+18.9%	+0.9%
ATR	Aug 18, 26	$7.02	-0.6%	-20.5%	+6.0%	+33.9%	+24.0%	+193.9%	+149.8%
Price	Aug 18, 26	$268.78	-0.7%	+7.5%	+23.1%	+6.5%	+11.8%	+105.8%	+130.8%
200-Day SMA	Aug 18, 26	$243.10	+0.1%	+0.7%	+0.5%	+2.4%	+14.2%	+84.0%	+101.8%
50-Day SMA	Aug 18, 26	$255.44	+0.2%	+5.7%	+18.1%	+3.4%	+2.9%	+85.6%	+104.9%
20-Day SMA	Aug 18, 26	$262.67	+0.4%	+3.8%	+23.2%	+5.5%	+5.0%	+89.8%	+118.1%

3-Month Volatility History

Date	Value	Change
Aug 18, 2026	36.10%	+50.9%
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 36.38%
What 3-month volatility category does HEI.A fall into?: Based on its current 3-month historical volatility, HEI.A falls into the moderate 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

31.28%

August 18, 2026

Summary

Current Value: As of today, HEI.A 1-year volatility is 31.28%, up +0.16% on August 18, 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 31.91% on August 29, 2025
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	Aug 18, 26	31.28%	+0.2%	-1.1%	+7.5%	+1.6%	+4.8%	+15.4%	-2.7%
10-Day Volatility	Aug 18, 26	19.61%	-3.5%	-7.7%	-46.7%	-45.6%	-41.9%	+14.9%	-50.0%
1-Month Volatility	Aug 18, 26	21.81%	-1.0%	-19.8%	-37.6%	-25.1%	-20.6%	+25.4%	-26.6%
3-Month Volatility	Aug 18, 26	36.38%	+0.9%	-8.2%	+7.9%	+51.1%	+28.1%	+35.3%	+43.0%
1-Year Volatility	Aug 18, 26	31.28%	+0.2%	-1.1%	+7.5%	+1.6%	+4.8%	+15.4%	-2.7%
14-Day RSI	Aug 18, 26	59.36	-4.5%	+17.3%	+14.6%	+11.7%	+53.3%	+100.4%	+49.0%
Beta	Aug 18, 26	1.07	-0.9%	-5.3%	+1.9%	+59.7%	+55.1%	+18.9%	+0.9%
ATR	Aug 18, 26	$7.02	-0.6%	-20.5%	+6.0%	+33.9%	+24.0%	+193.9%	+149.8%
Price	Aug 18, 26	$268.78	-0.7%	+7.5%	+23.1%	+6.5%	+11.8%	+105.8%	+130.8%
200-Day SMA	Aug 18, 26	$243.10	+0.1%	+0.7%	+0.5%	+2.4%	+14.2%	+84.0%	+101.8%
50-Day SMA	Aug 18, 26	$255.44	+0.2%	+5.7%	+18.1%	+3.4%	+2.9%	+85.6%	+104.9%
20-Day SMA	Aug 18, 26	$262.67	+0.4%	+3.8%	+23.2%	+5.5%	+5.0%	+89.8%	+118.1%

1-Year Volatility History

Date	Value	Change
Aug 18, 2026	31.24%	+1.5%
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 31.28%
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 31.91% on August 29, 2025
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