What is the current 10-day volatility of COST?

As of today, COST 10-day volatility is 25.78%

What 10-day volatility category does COST fall into?

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

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

COST 10-day volatility reached a 1-year high of 32.67% on July 16, 2026

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

COST 10-day volatility reached a 1-year low of 9.63% on April 1, 2026

What is the current 1-month volatility of COST?

As of today, COST 1-month volatility is 19.42%

What 1-month volatility category does COST fall into?

Based on its current 1-month historical volatility, COST falls into the low volatility category

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

COST 1-month volatility reached a 1-year high of 27.93% on June 1, 2026

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

COST 1-month volatility reached a 1-year low of 13.10% on April 7, 2026

What is the current 3-month volatility of COST?

As of today, COST 3-month volatility is 20.49%

What 3-month volatility category does COST fall into?

Based on its current 3-month historical volatility, COST falls into the low volatility category

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

COST 3-month volatility reached a 1-year high of 23.53% on July 30, 2026

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

COST 3-month volatility reached a 1-year low of 14.92% on September 25, 2025

What is the current 1-year volatility of COST?

As of today, COST 1-year volatility is 20.01%

What 1-year volatility category does COST fall into?

Based on its current 1-year historical volatility, COST falls into the low volatility category

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

COST 1-year volatility reached a 1-year high of 22.17% on February 13, 2026

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

COST 1-year volatility reached a 1-year low of 18.16% on April 22, 2026

COST Stock Volatility History & Chart Since 1986

10-Day

25.78%

August 28, 2026

Summary

Current Value: As of today, COST 10-day volatility is 25.78%, up +4.20% on August 28, 2026
Value Category: Based on its current 10-day historical volatility, COST falls into the moderate volatility category
1-Year High: COST 10-day volatility reached a 1-year high of 32.67% on July 16, 2026
1-Year Low: COST 10-day volatility reached a 1-year low of 9.63% on April 1, 2026

10-Day Volatility Chart

Performance

COST Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Aug 28, 26	25.78%	+4.2%	+23.0%	-9.5%	+101.6%	+33.1%	+80.9%	+63.1%
1-Month Volatility	Aug 28, 26	19.42%	-2.0%	-22.1%	-20.4%	+8.1%	+4.1%	+47.7%	+41.6%
3-Month Volatility	Aug 28, 26	20.49%	-5.4%	-12.4%	+4.2%	+15.3%	+13.4%	+55.1%	+59.1%
1-Year Volatility	Aug 28, 26	20.01%	+0.3%	+0.6%	+5.2%	-7.4%	-7.0%	-13.2%	+11.3%
14-Day RSI	Aug 28, 26	48.05	+9.3%	-17.2%	+14.3%	+20.8%	+15.8%	+23.8%	-24.3%
Beta	Aug 28, 26	-0.14	0.0%	-27.3%	-800.0%	-130.4%	-125.5%	-116.3%	-122.6%
ATR	Aug 28, 26	$18.30	+0.3%	-8.8%	-16.2%	+38.2%	+21.8%	+156.3%	+215.8%
Price	Aug 28, 26	$945.47	+1.2%	-2.2%	-5.0%	+9.6%	+0.1%	+76.3%	+110.0%
200-Day SMA	Aug 28, 26	$959.94	+0.0%	+0.3%	+0.2%	+0.9%	-1.6%	+89.1%	+153.2%
50-Day SMA	Aug 28, 26	$945.78	-0.0%	-2.2%	-6.2%	+5.1%	-2.2%	+73.5%	+123.8%
20-Day SMA	Aug 28, 26	$951.56	-0.0%	+1.7%	-7.3%	+8.9%	-1.6%	+72.8%	+113.2%

10-Day Volatility History

Date	Value	Change
Aug 28, 2026	25.78%	+101.6%
Dec 31, 2025	12.79%	-8.8%
Dec 31, 2024	14.02%	-57.5%
Dec 31, 2023	32.99%	+167.6%
Dec 31, 2022	12.33%	-17.5%
Dec 31, 2021	14.95%	+16.1%
Dec 31, 2020	12.88%	+24.7%
Dec 31, 2019	10.33%	-69.4%
Dec 31, 2018	33.81%	+60.6%
Dec 31, 2017	21.05%	+75.9%
Dec 31, 2016	11.97%	-25.0%
Dec 31, 2015	15.97%	+15.6%
Dec 31, 2014	13.81%	+135.3%
Dec 31, 2013	5.87%	-67.5%
Dec 31, 2012	18.07%	+30.0%
Dec 31, 2011	13.90%	+77.1%
Dec 31, 2010	7.85%	-52.6%
Dec 31, 2009	16.57%	-34.0%
Dec 31, 2008	25.09%	+88.6%
Dec 31, 2007	13.30%	+3.2%
Dec 31, 2006	12.89%	-7.7%

Date	Value	Change
Dec 31, 2005	13.97%	+24.6%
Dec 31, 2004	11.21%	-36.3%
Dec 31, 2003	17.59%	-33.0%
Dec 31, 2002	26.24%	+43.3%
Dec 31, 2001	18.31%	-70.1%
Dec 31, 2000	61.23%	+187.7%
Dec 31, 1999	21.28%	-58.7%
Dec 31, 1998	51.53%	+28.3%
Dec 31, 1997	40.15%	+36.0%
Dec 31, 1996	29.53%	-52.0%
Dec 31, 1995	61.49%	+86.3%
Dec 31, 1994	33.01%	+3.8%
Dec 31, 1993	31.81%	+6.0%
Dec 31, 1992	30.01%	-57.8%
Dec 31, 1991	71.17%	+125.5%
Dec 31, 1990	31.56%	+8.5%
Dec 31, 1989	29.08%	+26.3%
Dec 31, 1988	23.03%	-66.0%
Dec 31, 1987	67.68%	+256.8%
Dec 31, 1986	18.97%	-

FAQ

What is the current 10-day volatility of COST?: As of today, COST 10-day volatility is 25.78%
What 10-day volatility category does COST fall into?: Based on its current 10-day historical volatility, COST falls into the moderate volatility category
What is COST 10-day volatility 1-year high?: COST 10-day volatility reached a 1-year high of 32.67% on July 16, 2026
What is COST 10-day volatility 1-year low?: COST 10-day volatility reached a 1-year low of 9.63% on April 1, 2026

1-Month

19.42%

August 28, 2026

Summary

Current Value: As of today, COST 1-month volatility is 19.42%, down -2.02% on August 28, 2026
Value Category: Based on its current 1-month historical volatility, COST falls into the low volatility category
1-Year High: COST 1-month volatility reached a 1-year high of 27.93% on June 1, 2026
1-Year Low: COST 1-month volatility reached a 1-year low of 13.10% on April 7, 2026

Performance

COST Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Aug 28, 26	19.42%	-2.0%	-22.1%	-20.4%	+8.1%	+4.1%	+47.7%	+41.6%
10-Day Volatility	Aug 28, 26	25.78%	+4.2%	+23.0%	-9.5%	+101.6%	+33.1%	+80.9%	+63.1%
3-Month Volatility	Aug 28, 26	20.49%	-5.4%	-12.4%	+4.2%	+15.3%	+13.4%	+55.1%	+59.1%
1-Year Volatility	Aug 28, 26	20.01%	+0.3%	+0.6%	+5.2%	-7.4%	-7.0%	-13.2%	+11.3%
14-Day RSI	Aug 28, 26	48.05	+9.3%	-17.2%	+14.3%	+20.8%	+15.8%	+23.8%	-24.3%
Beta	Aug 28, 26	-0.14	0.0%	-27.3%	-800.0%	-130.4%	-125.5%	-116.3%	-122.6%
ATR	Aug 28, 26	$18.30	+0.3%	-8.8%	-16.2%	+38.2%	+21.8%	+156.3%	+215.8%
Price	Aug 28, 26	$945.47	+1.2%	-2.2%	-5.0%	+9.6%	+0.1%	+76.3%	+110.0%
200-Day SMA	Aug 28, 26	$959.94	+0.0%	+0.3%	+0.2%	+0.9%	-1.6%	+89.1%	+153.2%
50-Day SMA	Aug 28, 26	$945.78	-0.0%	-2.2%	-6.2%	+5.1%	-2.2%	+73.5%	+123.8%
20-Day SMA	Aug 28, 26	$951.56	-0.0%	+1.7%	-7.3%	+8.9%	-1.6%	+72.8%	+113.2%

1-Month Volatility History

Date	Value	Change
Aug 28, 2026	19.47%	+11.1%
Dec 31, 2025	17.53%	+22.9%
Dec 31, 2024	14.26%	-44.4%
Dec 31, 2023	25.64%	-8.1%
Dec 31, 2022	27.90%	-14.0%
Dec 31, 2021	32.43%	+123.7%
Dec 31, 2020	14.50%	+25.0%
Dec 31, 2019	11.60%	-73.8%
Dec 31, 2018	44.29%	+143.2%
Dec 31, 2017	18.21%	+25.0%
Dec 31, 2016	14.57%	-41.3%
Dec 31, 2015	24.80%	+58.4%
Dec 31, 2014	15.66%	+43.0%
Dec 31, 2013	10.95%	-62.8%
Dec 31, 2012	29.41%	+80.4%
Dec 31, 2011	16.30%	+20.8%
Dec 31, 2010	13.49%	-20.5%
Dec 31, 2009	16.96%	-62.1%
Dec 31, 2008	44.78%	+115.8%
Dec 31, 2007	20.75%	+18.1%
Dec 31, 2006	17.57%	+5.3%

Date	Value	Change
Dec 31, 2005	16.68%	-12.3%
Dec 31, 2004	19.03%	+7.6%
Dec 31, 2003	17.69%	-45.8%
Dec 31, 2002	32.61%	+0.6%
Dec 31, 2001	32.41%	-42.1%
Dec 31, 2000	56.00%	+83.8%
Dec 31, 1999	30.47%	-39.4%
Dec 31, 1998	50.25%	+38.0%
Dec 31, 1997	36.40%	+50.4%
Dec 31, 1996	24.21%	-48.0%
Dec 31, 1995	46.56%	+39.4%
Dec 31, 1994	33.39%	-9.9%
Dec 31, 1993	37.06%	+17.2%
Dec 31, 1992	31.63%	-39.7%
Dec 31, 1991	52.44%	+78.2%
Dec 31, 1990	29.42%	+3.4%
Dec 31, 1989	28.44%	+41.6%
Dec 31, 1988	20.08%	-70.9%
Dec 31, 1987	69.03%	+98.0%
Dec 31, 1986	34.87%	-

FAQ

What is the current 1-month volatility of COST?: As of today, COST 1-month volatility is 19.42%
What 1-month volatility category does COST fall into?: Based on its current 1-month historical volatility, COST falls into the low volatility category
What is COST 1-month volatility 1-year high?: COST 1-month volatility reached a 1-year high of 27.93% on June 1, 2026
What is COST 1-month volatility 1-year low?: COST 1-month volatility reached a 1-year low of 13.10% on April 7, 2026

3-Month

20.49%

August 28, 2026

Summary

Current Value: As of today, COST 3-month volatility is 20.49%, down -5.40% on August 28, 2026
Value Category: Based on its current 3-month historical volatility, COST falls into the low volatility category
1-Year High: COST 3-month volatility reached a 1-year high of 23.53% on July 30, 2026
1-Year Low: COST 3-month volatility reached a 1-year low of 14.92% on September 25, 2025

Performance

COST Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Aug 28, 26	20.49%	-5.4%	-12.4%	+4.2%	+15.3%	+13.4%	+55.1%	+59.1%
10-Day Volatility	Aug 28, 26	25.78%	+4.2%	+23.0%	-9.5%	+101.6%	+33.1%	+80.9%	+63.1%
1-Month Volatility	Aug 28, 26	19.42%	-2.0%	-22.1%	-20.4%	+8.1%	+4.1%	+47.7%	+41.6%
1-Year Volatility	Aug 28, 26	20.01%	+0.3%	+0.6%	+5.2%	-7.4%	-7.0%	-13.2%	+11.3%
14-Day RSI	Aug 28, 26	48.05	+9.3%	-17.2%	+14.3%	+20.8%	+15.8%	+23.8%	-24.3%
Beta	Aug 28, 26	-0.14	0.0%	-27.3%	-800.0%	-130.4%	-125.5%	-116.3%	-122.6%
ATR	Aug 28, 26	$18.30	+0.3%	-8.8%	-16.2%	+38.2%	+21.8%	+156.3%	+215.8%
Price	Aug 28, 26	$945.47	+1.2%	-2.2%	-5.0%	+9.6%	+0.1%	+76.3%	+110.0%
200-Day SMA	Aug 28, 26	$959.94	+0.0%	+0.3%	+0.2%	+0.9%	-1.6%	+89.1%	+153.2%
50-Day SMA	Aug 28, 26	$945.78	-0.0%	-2.2%	-6.2%	+5.1%	-2.2%	+73.5%	+123.8%
20-Day SMA	Aug 28, 26	$951.56	-0.0%	+1.7%	-7.3%	+8.9%	-1.6%	+72.8%	+113.2%

3-Month Volatility History

Date	Value	Change
Aug 28, 2026	21.75%	+22.9%
Dec 31, 2025	17.70%	+3.0%
Dec 31, 2024	17.19%	-17.0%
Dec 31, 2023	20.72%	-27.7%
Dec 31, 2022	28.66%	+22.7%
Dec 31, 2021	23.35%	+19.6%
Dec 31, 2020	19.52%	+68.7%
Dec 31, 2019	11.57%	-65.0%
Dec 31, 2018	33.03%	+56.4%
Dec 31, 2017	21.12%	+50.1%
Dec 31, 2016	14.07%	-27.5%
Dec 31, 2015	19.40%	+25.4%
Dec 31, 2014	15.47%	+15.4%
Dec 31, 2013	13.40%	-49.0%
Dec 31, 2012	26.25%	+43.7%
Dec 31, 2011	18.27%	+18.8%
Dec 31, 2010	15.38%	-10.2%
Dec 31, 2009	17.12%	-70.5%
Dec 31, 2008	58.00%	+108.2%
Dec 31, 2007	27.86%	+20.9%
Dec 31, 2006	23.04%	+11.5%

Date	Value	Change
Dec 31, 2005	20.66%	+2.5%
Dec 31, 2004	20.15%	+6.9%
Dec 31, 2003	18.85%	-57.9%
Dec 31, 2002	44.75%	+17.9%
Dec 31, 2001	37.94%	-34.8%
Dec 31, 2000	58.22%	+38.3%
Dec 31, 1999	42.11%	-10.8%
Dec 31, 1998	47.21%	+27.8%
Dec 31, 1997	36.94%	+26.1%
Dec 31, 1996	29.29%	-11.4%
Dec 31, 1995	33.06%	+1.1%
Dec 31, 1994	32.71%	-18.0%
Dec 31, 1993	39.91%	-16.8%
Dec 31, 1992	47.94%	+17.8%
Dec 31, 1991	40.71%	+8.7%
Dec 31, 1990	37.44%	+14.8%
Dec 31, 1989	32.62%	+33.3%
Dec 31, 1988	24.48%	-63.4%
Dec 31, 1987	66.93%	+92.0%
Dec 31, 1986	34.86%	-

FAQ

What is the current 3-month volatility of COST?: As of today, COST 3-month volatility is 20.49%
What 3-month volatility category does COST fall into?: Based on its current 3-month historical volatility, COST falls into the low volatility category
What is COST 3-month volatility 1-year high?: COST 3-month volatility reached a 1-year high of 23.53% on July 30, 2026
What is COST 3-month volatility 1-year low?: COST 3-month volatility reached a 1-year low of 14.92% on September 25, 2025

1-Year

20.01%

August 28, 2026

Summary

Current Value: As of today, COST 1-year volatility is 20.01%, up +0.35% on August 28, 2026
Value Category: Based on its current 1-year historical volatility, COST falls into the low volatility category
1-Year High: COST 1-year volatility reached a 1-year high of 22.17% on February 13, 2026
1-Year Low: COST 1-year volatility reached a 1-year low of 18.16% on April 22, 2026

Performance

COST Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Aug 28, 26	20.01%	+0.3%	+0.6%	+5.2%	-7.4%	-7.0%	-13.2%	+11.3%
10-Day Volatility	Aug 28, 26	25.78%	+4.2%	+23.0%	-9.5%	+101.6%	+33.1%	+80.9%	+63.1%
1-Month Volatility	Aug 28, 26	19.42%	-2.0%	-22.1%	-20.4%	+8.1%	+4.1%	+47.7%	+41.6%
3-Month Volatility	Aug 28, 26	20.49%	-5.4%	-12.4%	+4.2%	+15.3%	+13.4%	+55.1%	+59.1%
1-Year Volatility	Aug 28, 26	20.01%	+0.3%	+0.6%	+5.2%	-7.4%	-7.0%	-13.2%	+11.3%
14-Day RSI	Aug 28, 26	48.05	+9.3%	-17.2%	+14.3%	+20.8%	+15.8%	+23.8%	-24.3%
Beta	Aug 28, 26	-0.14	0.0%	-27.3%	-800.0%	-130.4%	-125.5%	-116.3%	-122.6%
ATR	Aug 28, 26	$18.30	+0.3%	-8.8%	-16.2%	+38.2%	+21.8%	+156.3%	+215.8%
Price	Aug 28, 26	$945.47	+1.2%	-2.2%	-5.0%	+9.6%	+0.1%	+76.3%	+110.0%
200-Day SMA	Aug 28, 26	$959.94	+0.0%	+0.3%	+0.2%	+0.9%	-1.6%	+89.1%	+153.2%
50-Day SMA	Aug 28, 26	$945.78	-0.0%	-2.2%	-6.2%	+5.1%	-2.2%	+73.5%	+123.8%
20-Day SMA	Aug 28, 26	$951.56	-0.0%	+1.7%	-7.3%	+8.9%	-1.6%	+72.8%	+113.2%

1-Year Volatility History

Date	Value	Change
Aug 28, 2026	19.97%	-7.5%
Dec 31, 2025	21.60%	+14.7%
Dec 31, 2024	18.83%	-1.6%
Dec 31, 2023	19.14%	-38.9%
Dec 31, 2022	31.35%	+65.8%
Dec 31, 2021	18.91%	-35.1%
Dec 31, 2020	29.14%	+81.3%
Dec 31, 2019	16.07%	-28.0%
Dec 31, 2018	22.32%	+15.5%
Dec 31, 2017	19.32%	+10.0%
Dec 31, 2016	17.57%	-4.7%
Dec 31, 2015	18.43%	+27.9%
Dec 31, 2014	14.41%	+1.6%
Dec 31, 2013	14.18%	-22.3%
Dec 31, 2012	18.25%	-16.7%
Dec 31, 2011	21.92%	+26.3%
Dec 31, 2010	17.35%	-39.5%
Dec 31, 2009	28.70%	-29.3%
Dec 31, 2008	40.57%	+77.3%
Dec 31, 2007	22.88%	+6.5%
Dec 31, 2006	21.48%	+0.6%

Date	Value	Change
Dec 31, 2005	21.36%	+9.7%
Dec 31, 2004	19.47%	-38.4%
Dec 31, 2003	31.63%	-17.5%
Dec 31, 2002	38.35%	-9.3%
Dec 31, 2001	42.28%	-31.1%
Dec 31, 2000	61.38%	+57.8%
Dec 31, 1999	38.89%	-11.7%
Dec 31, 1998	44.03%	+14.0%
Dec 31, 1997	38.62%	+29.1%
Dec 31, 1996	29.91%	-9.3%
Dec 31, 1995	32.98%	-14.0%
Dec 31, 1994	38.33%	-1.6%
Dec 31, 1993	38.94%	-9.7%
Dec 31, 1992	43.11%	+19.8%
Dec 31, 1991	36.00%	-0.7%
Dec 31, 1990	36.26%	+21.3%
Dec 31, 1989	29.90%	+8.9%
Dec 31, 1988	27.45%	-41.5%
Dec 31, 1987	46.95%	+0.5%
Dec 31, 1986	46.73%	-

FAQ

What is the current 1-year volatility of COST?: As of today, COST 1-year volatility is 20.01%
What 1-year volatility category does COST fall into?: Based on its current 1-year historical volatility, COST falls into the low volatility category
What is COST 1-year volatility 1-year high?: COST 1-year volatility reached a 1-year high of 22.17% on February 13, 2026
What is COST 1-year volatility 1-year low?: COST 1-year volatility reached a 1-year low of 18.16% on April 22, 2026

Data Sources & References

COST Official Website www.costco.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/909832/000090983225000101/0000909832-25-000101-index.htm
COST Profile on Yahoo Finance finance.yahoo.com/quote/COST
COST Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/cost