Michael Burry Flips Bullish on Microsoft and MSFT Catches a Bid

The Catalyst Is a Name, Not a Number

A $2.8T mega-cap does not move 5.66% in a day on nothing, and this time the "something" was not Microsoft. On Thursday, Michael Burry disclosed via a Substack post that he bought Microsoft December 15, 2028 LEAP calls struck "in the low $700s." He wrote that he considers ~$350 a good place to buy the stock but chose the long-dated options because they were "inexpensive" relative to his outlook. The post hit, retail and institutional buyers stepped in, and the stock caught a bid on a single fund manager's option ticket. No earnings, no guidance, no launch — the catalyst here is a name, not a number.

Why This Is the Burry Reversal

What makes this interesting is not that someone bought MSFT calls — it is that *Burry* did. The Big Short investor spent early 2026 warning about AI-hyperscaler capex, and Microsoft is the largest spender in that race, with roughly $190 billion in projected FY2026 capex. Going long the most expensive AI-infrastructure bet on the board is a genuine tone shift.

The structure matters too. He did not buy shares; he bought cheap 2028 optionality struck nearly 2x above spot — low premium, high convexity, long exposure without committing much capital. The same disclosure included adds to JD.com, Adobe, and Fiserv, a half-cover of his Palantir short, and an Alibaba sale. Keep in mind his recent record is mixed, and the market traded the headline, not the thesis behind it.

What Actually Changed at Microsoft

Strip Burry out and the fundamental news is incremental. A PCE inflation reading in line with expectations eased rate fears and pulled Treasury yields lower, which helps rate-sensitive mega-cap growth. The selloff into June — MSFT was down roughly 11% month-to-date and 22% year-to-date — compressed the forward multiple below its five-year median, giving value buyers a clean story.

The AI-monetization narrative also got fresh fuel: Copilot Cowork reached general availability on June 16, and Microsoft Scout, an always-on agent, launched at Build on June 2. None of that is a 5.66% catalyst by itself. Together they are the backdrop that let the Burry headline land instead of getting faded.

The Setup From Here

This printed on the MSFT HIP-3 perp, which runs 24/7, so the move was tradable regardless of where the NASDAQ tape was. Volume on the perp ran about $24.4M over the last 24 hours — thin enough that a sentiment-driven pop can overshoot in either direction.

The honest framing: this is a disclosure-driven move with no change in Microsoft's actual fundamentals, and moves like that tend to mean-revert if follow-through buyers do not show up. The level that matters is the ~$350 Burry flagged as cheap. Hold well above it and the bid has a floor to lean on; lose it and the "smart money is buying here" narrative gets a lot weaker.