Microsoft’s Post-Earnings Stock Surge Fuels Short-Volatility Trade Idea

Following Microsoft’s (MSFT) fourth-quarter earnings and a record-setting market-capitalization gain of $450 billion in a single trading day, columnist Mike Khouw proposes a defined-duration short-volatility strategy: sell the August 21 weekly $412.50 put and $485 call as a strangle. The combined credit of $7.30 per share ($730 per strangle) translates to a 21-day absolute yield of roughly 1.6 %—about 28 % annualized—driven by post-earnings implied-volatility crush and rapid time decay.

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Khouw notes that Microsoft now trades at about 22.6 times forward earnings, placing the stock near the midpoint of its 20-year valuation range. The company continues to deliver mid-teens revenue growth and dominates enterprise cloud services, providing a “fundamental floor” for the share price despite elevated AI-related capital-expenditure headlines.

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The put side offers a “generous buffer,” with a break-even of $405.20 after the $7.30 credit, making a gap down to the pre-earnings price unlikely. On the upside, the $485 call sits above a key resistance level that previously halted a sharp rally in late January; the position would only be threatened by a sustained post-earnings rally exceeding 8.5 % within the 21-day window. Khouw cautions that, unless the trade is hedged against an existing long position, the short call carries theoretically unlimited loss potential—though the odds of the stock doubling before expiration are deemed low. Assignment outcomes align with acceptable positions: a put assignment would result in a net cost basis of $405.20 per share, while a call assignment would create a short position (or trim a long) at an effective price of $492.30, still capturing a material premium over the post-earnings range.

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Khouw frames the strategy as a “high-probability income trade” that leverages the immediate binary-event risk being resolved after earnings. He argues that the current valuation does not justify either a sustained breakdown or a compelling breakout, making the short-volatility approach an “ideal setup” for investors seeking defined-duration exposure to Microsoft’s stock.

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