Costco Stock Jumps on Earnings Beat, but Options Market Signals Caution

Costco Wholesale Corp. (NASDAQ: COST) shares rallied Friday after the retail giant reported better-than-expected quarterly earnings, but a closer look at the options market reveals a mix of bullish sentiment and significant hedging activity.

As of midday trading on September 25, the stock was up +2.38% to $917.86, confirming a positive investor reaction to the earnings release from the previous evening.

Volatility Drops, But Puts Gain Value

Following the earnings announcement, a predictable “IV crush” occurred as market uncertainty subsided. According to market data, 3-month implied volatility fell by 1.78 percentage points to 21.19%. This benefits traders who sold options contracts ahead of the report, capitalizing on the inflated pre-earnings premiums.

However, a key indicator suggests underlying caution. The skew between put and call options widened, signaling that demand for downside protection (puts) is growing relative to upside bets (calls). This suggests some traders are preparing for a potential pullback despite the stock's immediate gains.

Conflicting Signals in Major Trades

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While the overall call-to-put volume ratio was bullish at approximately 1.25 to 1, analysis of large, specific trades shows a divided outlook:

• Bullish Bets: One notable trade involved the accumulation of $960 strike calls expiring on October 16. With volume of 1,311 contracts against an open interest of 1,061, this indicates traders are adding to existing positions, betting on continued upward momentum in the short term.
• Bearish Hedges: In a significant counter-signal, a new position was opened consisting of 2,435 put contracts at the $740 strike for November 20. This deep out-of-the-money trade, far below the current stock price, represents a substantial hedge against a sharp decline.
• Defined-Risk Positions: Another bearish structure was an $880/$885 put spread for the October 16 expiration. This type of trade is a measured hedge, designed to protect against a modest drop in the share price.

Context: Valuation in Focus

The mixed signals in the options market may reflect lingering concerns about Costco's high valuation. Prior to the earnings report, analysts had noted the stock's elevated price-to-earnings ratio of 45x trailing earnings, which can sometimes lead to a "sell-the-news" reaction even after positive results. The significant put buying suggests that despite the strong quarter, some institutional investors are not chasing the rally without insurance.