Options markets are signaling an approximate 3% price swing for Costco Wholesale Corp. (COST) when the company releases quarterly results after the close on May 28, based on data compiled by Bloomberg.
That 3% figure represents the market's expectation for the stock's short-term volatility around the earnings announcement. Historical comparisons across the last eight quarterly reports show that actual moves have not consistently tracked the options-implied estimate. In three of those eight quarters the stock moved by more than the options-implied figure; in the remaining five it did not.
Notable past outcomes
- The largest actual near-term moves after earnings during this window came in March 2025, when shares fell 6.6%, and in September 2025, when the stock declined 4.9%. Both of those drops exceeded the respective options-implied moves of 3.6% and 3.5%.
- By contrast, the March 2026 report had an implied move of 3.2%, yet shares reacted only 0.3% that quarter, well below expectations.
- Across the eight most recent quarters, Costco's stock fell after five earnings releases and rose after three.
- The largest single implied move in that span was 3.9% in May 2024, although the actual change that quarter was a comparatively modest 1%.
These outcomes illustrate variability in how closely options-implied moves map to actual price behavior following quarterly reports. The upcoming 3% implied range is slightly smaller than the 3.2% implied move tied to the March 2026 release, which produced only a 0.3% actual change.
Context and takeaway
The options-implied move is a forward-looking measure of expected volatility priced by market participants. For traders and portfolio managers focused on the retail sector and broader equity markets, the 3% estimate provides a baseline for scenario planning around the May 28 release. Historical results show the realized reaction can differ materially from the expectation - both to the upside and downside - underscoring uncertainty tied to individual earnings reports.
Market participants tracking Costco and related consumer-facing equities may use the implied move as one input among several when sizing positions or hedges ahead of earnings. The past eight-quarter record indicates that while the implied move often approximates potential volatility, it is not a precise predictor of the direction or magnitude of the stock's reaction.