COST
Costco Wholesale Corporation (COST) stock in 2026, day by day
+13.9% this year100 up days, 97 downbest +3.7% Jan 8worst −4.2% Jul 9
Move
Direction
Days
Shade
−2.2%−1.1%−0.4%+0.4%+1.1%+2.2%
Jan+9.0%
Feb+7.5%
Mar−1.4%
Apr+1.8%
May−5.7%
Jun−2.2%
Jul+1.8%
Aug−0.8%
Sep−3.6%
Oct+7.9%
Wed, Oct 14$982.00+2.87%
COST’s best days in 2026
- +3.71%
- +3.17%
- +2.99%
- +2.93%Earnings, reported Sep 24 after the close (EPS +3.4% vs estimate)
- +2.92%
COST’s worst days in 2026
- −4.21%
- −3.91%Earnings, reported May 28 after the close (EPS -0.8% vs estimate)
- −3.25%
- −2.64%
- −2.46%
Each day is its close against the session before, from Yahoo Finance, not adjusted for dividends. A month’s figure is its sessions compounded. An ordinary day for COST is 0.7%, the median move over the last year. earnings, ex-dividend. Not investment advice.