What is the current 10-day volatility of ACM?

As of today, ACM 10-day volatility is 39.73%

What 10-day volatility category does ACM fall into?

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

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

ACM 10-day volatility reached a 1-year high of 83.50% on February 26, 2026

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

ACM 10-day volatility reached a 1-year low of 8.69% on October 7, 2025

What is the current 1-month volatility of ACM?

As of today, ACM 1-month volatility is 36.17%

What 1-month volatility category does ACM fall into?

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

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

ACM 1-month volatility reached a 1-year high of 62.63% on March 4, 2026

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

ACM 1-month volatility reached a 1-year low of 15.91% on January 2, 2026

What is the current 3-month volatility of ACM?

As of today, ACM 3-month volatility is 43.37%

What 3-month volatility category does ACM fall into?

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

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

ACM 3-month volatility reached a 1-year high of 43.37% on September 25, 2026

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

ACM 3-month volatility reached a 1-year low of 19.50% on November 14, 2025

What is the current 1-year volatility of ACM?

As of today, ACM 1-year volatility is 37.30%

What 1-year volatility category does ACM fall into?

Based on its current 1-year historical volatility, ACM falls into the moderate volatility category

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

ACM 1-year volatility reached a 1-year high of 37.30% on September 25, 2026

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

ACM 1-year volatility reached a 1-year low of 22.92% on November 14, 2025

AECOM (ACM) Stock Volatility History & Chart Since 2007

10-Day

39.73%

September 25, 2026

Summary

Current Value: As of today, ACM 10-day volatility is 39.73%, up +22.28% on September 25, 2026
Value Category: Based on its current 10-day historical volatility, ACM falls into the moderate volatility category
1-Year High: ACM 10-day volatility reached a 1-year high of 83.50% on February 26, 2026
1-Year Low: ACM 10-day volatility reached a 1-year low of 8.69% on October 7, 2025

10-Day Volatility Chart

Performance

ACM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Sep 25, 26	39.73%	+22.3%	-36.3%	+68.1%	+195.8%	+34.8%	+66.0%	-11.9%
1-Month Volatility	Sep 25, 26	36.17%	-0.1%	-36.4%	+27.1%	+107.6%	+54.2%	+79.0%	+11.0%
3-Month Volatility	Sep 25, 26	43.37%	+2.5%	+6.6%	+22.7%	+36.3%	+104.5%	+133.3%	+63.5%
1-Year Volatility	Sep 25, 26	37.30%	+0.8%	+2.8%	+15.4%	+40.5%	+58.3%	+66.1%	+28.8%
14-Day RSI	Sep 25, 26	40.79	+27.0%	+6.4%	-8.7%	+69.5%	-27.2%	+14.2%	-29.5%
Beta	Sep 25, 26	0.90	+1.1%	+1.1%	+1.1%	+16.9%	+15.4%	+9.8%	-18.2%
ATR	Sep 25, 26	$2.24	+4.3%	-13.2%	-7.1%	+2.0%	-9.3%	+45.4%	+32.0%
Price	Sep 25, 26	$60.89	+4.0%	-3.0%	-13.2%	-36.1%	-52.6%	-25.7%	-9.1%
200-Day SMA	Sep 25, 26	$80.91	-0.3%	-6.5%	-18.7%	-28.5%	-25.5%	-4.6%	+32.9%
50-Day SMA	Sep 25, 26	$66.77	-0.3%	-3.0%	-11.4%	-41.4%	-45.1%	-22.8%	+4.6%
20-Day SMA	Sep 25, 26	$64.11	-0.4%	-6.3%	-8.8%	-35.2%	-49.8%	-24.6%	-2.1%

10-Day Volatility History

Date	Value	Change
Sep 25, 2026	39.73%	+195.8%
Dec 31, 2025	13.43%	-22.9%
Dec 31, 2024	17.43%	+4.4%
Dec 31, 2023	16.70%	+8.4%
Dec 31, 2022	15.40%	-10.4%
Dec 31, 2021	17.18%	+29.6%
Dec 31, 2020	13.26%	-3.6%
Dec 31, 2019	13.75%	-64.9%
Dec 31, 2018	39.16%	+177.1%
Dec 31, 2017	14.13%	+16.7%

Date	Value	Change
Dec 31, 2016	12.11%	-53.7%
Dec 31, 2015	26.14%	+8.4%
Dec 31, 2014	24.12%	+47.3%
Dec 31, 2013	16.38%	+52.5%
Dec 31, 2012	10.74%	-62.5%
Dec 31, 2011	28.66%	+96.2%
Dec 31, 2010	14.61%	-12.0%
Dec 31, 2009	16.61%	-76.2%
Dec 31, 2008	69.74%	+82.2%
Dec 31, 2007	38.28%	-

FAQ

What is the current 10-day volatility of ACM?: As of today, ACM 10-day volatility is 39.73%
What 10-day volatility category does ACM fall into?: Based on its current 10-day historical volatility, ACM falls into the moderate volatility category
What is ACM 10-day volatility 1-year high?: ACM 10-day volatility reached a 1-year high of 83.50% on February 26, 2026
What is ACM 10-day volatility 1-year low?: ACM 10-day volatility reached a 1-year low of 8.69% on October 7, 2025

1-Month

36.17%

September 25, 2026

Summary

Current Value: As of today, ACM 1-month volatility is 36.17%, down -0.11% on September 25, 2026
Value Category: Based on its current 1-month historical volatility, ACM falls into the moderate volatility category
1-Year High: ACM 1-month volatility reached a 1-year high of 62.63% on March 4, 2026
1-Year Low: ACM 1-month volatility reached a 1-year low of 15.91% on January 2, 2026

Performance

ACM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Sep 25, 26	36.17%	-0.1%	-36.4%	+27.1%	+107.6%	+54.2%	+79.0%	+11.0%
10-Day Volatility	Sep 25, 26	39.73%	+22.3%	-36.3%	+68.1%	+195.8%	+34.8%	+66.0%	-11.9%
3-Month Volatility	Sep 25, 26	43.37%	+2.5%	+6.6%	+22.7%	+36.3%	+104.5%	+133.3%	+63.5%
1-Year Volatility	Sep 25, 26	37.30%	+0.8%	+2.8%	+15.4%	+40.5%	+58.3%	+66.1%	+28.8%
14-Day RSI	Sep 25, 26	40.79	+27.0%	+6.4%	-8.7%	+69.5%	-27.2%	+14.2%	-29.5%
Beta	Sep 25, 26	0.90	+1.1%	+1.1%	+1.1%	+16.9%	+15.4%	+9.8%	-18.2%
ATR	Sep 25, 26	$2.24	+4.3%	-13.2%	-7.1%	+2.0%	-9.3%	+45.4%	+32.0%
Price	Sep 25, 26	$60.89	+4.0%	-3.0%	-13.2%	-36.1%	-52.6%	-25.7%	-9.1%
200-Day SMA	Sep 25, 26	$80.91	-0.3%	-6.5%	-18.7%	-28.5%	-25.5%	-4.6%	+32.9%
50-Day SMA	Sep 25, 26	$66.77	-0.3%	-3.0%	-11.4%	-41.4%	-45.1%	-22.8%	+4.6%
20-Day SMA	Sep 25, 26	$64.11	-0.4%	-6.3%	-8.8%	-35.2%	-49.8%	-24.6%	-2.1%

1-Month Volatility History

Date	Value	Change
Sep 25, 2026	37.67%	+114.9%
Dec 31, 2025	17.53%	+35.6%
Dec 31, 2024	12.93%	-2.3%
Dec 31, 2023	13.24%	-20.4%
Dec 31, 2022	16.64%	-28.2%
Dec 31, 2021	23.16%	-16.0%
Dec 31, 2020	27.57%	+98.5%
Dec 31, 2019	13.89%	-59.7%
Dec 31, 2018	34.45%	+113.6%
Dec 31, 2017	16.13%	-25.7%

Date	Value	Change
Dec 31, 2016	21.72%	-21.3%
Dec 31, 2015	27.59%	-25.9%
Dec 31, 2014	37.23%	+74.7%
Dec 31, 2013	21.31%	+48.5%
Dec 31, 2012	14.35%	-49.8%
Dec 31, 2011	28.56%	+32.5%
Dec 31, 2010	21.55%	-10.9%
Dec 31, 2009	24.19%	-74.8%
Dec 31, 2008	95.99%	+169.5%
Dec 31, 2007	35.62%	-

FAQ

What is the current 1-month volatility of ACM?: As of today, ACM 1-month volatility is 36.17%
What 1-month volatility category does ACM fall into?: Based on its current 1-month historical volatility, ACM falls into the moderate volatility category
What is ACM 1-month volatility 1-year high?: ACM 1-month volatility reached a 1-year high of 62.63% on March 4, 2026
What is ACM 1-month volatility 1-year low?: ACM 1-month volatility reached a 1-year low of 15.91% on January 2, 2026

3-Month

43.37%

September 25, 2026

Summary

Current Value: As of today, ACM 3-month volatility is 43.37%, up +2.55% on September 25, 2026
Value Category: Based on its current 3-month historical volatility, ACM falls into the high volatility category
1-Year High: ACM 3-month volatility reached a 1-year high of 43.37% on September 25, 2026
1-Year Low: ACM 3-month volatility reached a 1-year low of 19.50% on November 14, 2025

Performance

ACM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Sep 25, 26	43.37%	+2.5%	+6.6%	+22.7%	+36.3%	+104.5%	+133.3%	+63.5%
10-Day Volatility	Sep 25, 26	39.73%	+22.3%	-36.3%	+68.1%	+195.8%	+34.8%	+66.0%	-11.9%
1-Month Volatility	Sep 25, 26	36.17%	-0.1%	-36.4%	+27.1%	+107.6%	+54.2%	+79.0%	+11.0%
1-Year Volatility	Sep 25, 26	37.30%	+0.8%	+2.8%	+15.4%	+40.5%	+58.3%	+66.1%	+28.8%
14-Day RSI	Sep 25, 26	40.79	+27.0%	+6.4%	-8.7%	+69.5%	-27.2%	+14.2%	-29.5%
Beta	Sep 25, 26	0.90	+1.1%	+1.1%	+1.1%	+16.9%	+15.4%	+9.8%	-18.2%
ATR	Sep 25, 26	$2.24	+4.3%	-13.2%	-7.1%	+2.0%	-9.3%	+45.4%	+32.0%
Price	Sep 25, 26	$60.89	+4.0%	-3.0%	-13.2%	-36.1%	-52.6%	-25.7%	-9.1%
200-Day SMA	Sep 25, 26	$80.91	-0.3%	-6.5%	-18.7%	-28.5%	-25.5%	-4.6%	+32.9%
50-Day SMA	Sep 25, 26	$66.77	-0.3%	-3.0%	-11.4%	-41.4%	-45.1%	-22.8%	+4.6%
20-Day SMA	Sep 25, 26	$64.11	-0.4%	-6.3%	-8.8%	-35.2%	-49.8%	-24.6%	-2.1%

3-Month Volatility History

Date	Value	Change
Sep 25, 2026	43.12%	+36.5%
Dec 31, 2025	31.59%	+47.5%
Dec 31, 2024	21.42%	-14.3%
Dec 31, 2023	25.00%	-4.7%
Dec 31, 2022	26.23%	-5.5%
Dec 31, 2021	27.77%	-12.0%
Dec 31, 2020	31.56%	+47.7%
Dec 31, 2019	21.37%	-41.6%
Dec 31, 2018	36.60%	+114.8%
Dec 31, 2017	17.04%	-61.3%

Date	Value	Change
Dec 31, 2016	44.01%	+58.5%
Dec 31, 2015	27.76%	-27.5%
Dec 31, 2014	38.28%	+57.1%
Dec 31, 2013	24.36%	-27.5%
Dec 31, 2012	33.58%	-13.2%
Dec 31, 2011	38.68%	+93.2%
Dec 31, 2010	20.02%	-32.5%
Dec 31, 2009	29.65%	-72.1%
Dec 31, 2008	106.12%	+122.3%
Dec 31, 2007	47.73%	-

FAQ

What is the current 3-month volatility of ACM?: As of today, ACM 3-month volatility is 43.37%
What 3-month volatility category does ACM fall into?: Based on its current 3-month historical volatility, ACM falls into the high volatility category
What is ACM 3-month volatility 1-year high?: ACM 3-month volatility reached a 1-year high of 43.37% on September 25, 2026
What is ACM 3-month volatility 1-year low?: ACM 3-month volatility reached a 1-year low of 19.50% on November 14, 2025

1-Year

37.30%

September 25, 2026

Summary

Current Value: As of today, ACM 1-year volatility is 37.30%, up +0.84% on September 25, 2026
Value Category: Based on its current 1-year historical volatility, ACM falls into the moderate volatility category
1-Year High: ACM 1-year volatility reached a 1-year high of 37.30% on September 25, 2026
1-Year Low: ACM 1-year volatility reached a 1-year low of 22.92% on November 14, 2025

Performance

ACM Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Sep 25, 26	37.30%	+0.8%	+2.8%	+15.4%	+40.5%	+58.3%	+66.1%	+28.8%
10-Day Volatility	Sep 25, 26	39.73%	+22.3%	-36.3%	+68.1%	+195.8%	+34.8%	+66.0%	-11.9%
1-Month Volatility	Sep 25, 26	36.17%	-0.1%	-36.4%	+27.1%	+107.6%	+54.2%	+79.0%	+11.0%
3-Month Volatility	Sep 25, 26	43.37%	+2.5%	+6.6%	+22.7%	+36.3%	+104.5%	+133.3%	+63.5%
1-Year Volatility	Sep 25, 26	37.30%	+0.8%	+2.8%	+15.4%	+40.5%	+58.3%	+66.1%	+28.8%
14-Day RSI	Sep 25, 26	40.79	+27.0%	+6.4%	-8.7%	+69.5%	-27.2%	+14.2%	-29.5%
Beta	Sep 25, 26	0.90	+1.1%	+1.1%	+1.1%	+16.9%	+15.4%	+9.8%	-18.2%
ATR	Sep 25, 26	$2.24	+4.3%	-13.2%	-7.1%	+2.0%	-9.3%	+45.4%	+32.0%
Price	Sep 25, 26	$60.89	+4.0%	-3.0%	-13.2%	-36.1%	-52.6%	-25.7%	-9.1%
200-Day SMA	Sep 25, 26	$80.91	-0.3%	-6.5%	-18.7%	-28.5%	-25.5%	-4.6%	+32.9%
50-Day SMA	Sep 25, 26	$66.77	-0.3%	-3.0%	-11.4%	-41.4%	-45.1%	-22.8%	+4.6%
20-Day SMA	Sep 25, 26	$64.11	-0.4%	-6.3%	-8.8%	-35.2%	-49.8%	-24.6%	-2.1%

1-Year Volatility History

Date	Value	Change
Sep 25, 2026	37.24%	+40.3%
Dec 31, 2025	26.55%	+21.1%
Dec 31, 2024	21.93%	+0.9%
Dec 31, 2023	21.74%	-25.5%
Dec 31, 2022	29.19%	+4.6%
Dec 31, 2021	27.90%	-49.7%
Dec 31, 2020	55.42%	+147.7%
Dec 31, 2019	22.37%	-14.5%
Dec 31, 2018	26.17%	-1.1%
Dec 31, 2017	26.47%	-26.0%

Date	Value	Change
Dec 31, 2016	35.78%	+24.7%
Dec 31, 2015	28.70%	-0.1%
Dec 31, 2014	28.73%	-4.9%
Dec 31, 2013	30.21%	-16.9%
Dec 31, 2012	36.34%	-0.2%
Dec 31, 2011	36.43%	+26.5%
Dec 31, 2010	28.79%	-40.4%
Dec 31, 2009	48.34%	-27.2%
Dec 31, 2008	66.39%	+51.2%
Dec 31, 2007	43.92%	-

FAQ

What is the current 1-year volatility of ACM?: As of today, ACM 1-year volatility is 37.30%
What 1-year volatility category does ACM fall into?: Based on its current 1-year historical volatility, ACM falls into the moderate volatility category
What is ACM 1-year volatility 1-year high?: ACM 1-year volatility reached a 1-year high of 37.30% on September 25, 2026
What is ACM 1-year volatility 1-year low?: ACM 1-year volatility reached a 1-year low of 22.92% on November 14, 2025

Data Sources & References

ACM Official Website aecom.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/868857/000086885725000013/0000868857-25-000013-index.htm
ACM Profile on Yahoo Finance finance.yahoo.com/quote/ACM
ACM Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/acm