Costco Options Market Pricing in 2.5% Post-Earnings Stock Move

Costco Wholesale Corp. (NASDAQ:COST) shares could see a move of approximately 2.5% in either direction following the company's earnings release scheduled for September 24, according to an analysis of options market data compiled by Bloomberg.

Gauging Market Expectations

The 2.5% figure represents the implied volatility derived from Costco's options contracts that expire shortly after the report. Traders use this metric to gauge the market's expectation for share price fluctuation, although it does not predict the direction of the move. The relatively modest figure suggests investors are not anticipating an exceptionally volatile reaction to the retailer's results.

Historical Performance vs. Implied Moves

A review of Costco's last eight earnings reports shows a mixed record of actual stock performance compared to what the options market had priced in. The stock's post-earnings move has exceeded the implied volatility in four of the past eight instances, according to the data.

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Notable examples of this divergence include:

• May 28: Options implied a 3.0% move, but shares fell 11.0%.
• March 6, 2025: Shares fell 6.6% versus an expected move of 3.6%.
• March 5: An implied 3.0% move was followed by an actual price change of just 0.3%.

Context for Investors

The actual market reaction will depend on the substance of Costco's report, which is due after the market close. Investors will be closely watching key performance indicators such as comparable sales, membership renewal rates, and gross margins, as well as management's forward-looking statements on consumer demand and inflation.