Options data suggest Costco shares could swing about 3% after its May 28 earnings release, per Bloomberg compilation.
Historically, the stock exceeded implied moves in three of eight quarters, with biggest drops of 6.6% (Mar 2025) and 4.9% (Sep 2025).
The current 3% implied move is lower than the 3.2% implied for March 2026, when the stock moved only 0.3%.
In the last eight quarters, Costco fell after five earnings, rose after three; the highest implied move was 3.9% in May 2024, actual 1%.