I was making coffee on May 8 when my phone buzzed once. Then again. Then a third time before the kettle finished. Three alert emails, all Microsoft: put prints at the $490 and $510 strikes, eight days to expiry, running at 8.1x and 8.4x volume over open interest. Somewhere north of $30 million in premium between them, on a morning when MSFT sat around $421 and the headlines were quiet.
Microsoft was my largest position. It had been for two years, and it had grown into a weight I kept promising myself I would trim 'after the next leg'. So I did what I always do when the alerts cluster: I read the actual prints, skimmed the news for anything that explained them, and found nothing.
The second cluster
Two weeks later, on May 22, the phone went again during my lunch break. One mail this time, but a big one: a single put block expiring in June, about $15 million in premium, with the stock at $419. Same direction, bigger conviction, longer window. Two clusters pointing the same way in two weeks is when I stop treating flow as noise.
That evening I browsed the news properly and ran a Perplexity deep research on Microsoft's setup: AI capex commentary, Azure growth expectations, what the sell side was penciling in for the June quarter, anything about enterprise budgets. The picture that came back was not bearish exactly - it was priced for perfection. Expectations had run far ahead of anything management had actually guided to.
What I did - and what I didn't
I did not dump the position. I trimmed it back to my target weight, sold the shares I had been mentally 'about to trim' for six months, and set a mental stop on the rest. It felt almost embarrassing when MSFT then ripped to $450 at the end of May and tagged $466 on June 1. For three days I looked like the guy who sold the top's warm-up act.
Then June happened. $441. $427. $416 by June 5. Under $400 the week after. By June 18 - the session the flagged June puts settled against - the stock closed at $379. This morning it traded below $350 before bouncing. From the June 1 high, that is roughly a 24% drawdown in under four weeks.
The puts I got alerted about in May were not a prophecy. They were a question: what does someone spending eight figures on downside know about your biggest position that you haven't priced in?
The honest accounting
The trim saved me from watching a full-size position lose a quarter of its value. It did not save me entirely - I still owned Microsoft on the way down, just less of it, deliberately. That is the realistic version of this story. Flow alerts don't teleport you out of positions; they hand you the uncomfortable question early enough that you can act on it calmly instead of panic-selling into a red tape.
If a cluster of eight-figure put prints ever lands on your largest holding, don't argue with it and don't obey it. Investigate it. Set up an alert on your portfolio so you at least get the question in time.