The risks that actually end careers

The first-order Greeks are the easy part. The small stuff is what ends careers.

Most people learn the Greeks and assume the big ones are the dangerous ones. Delta. Gamma. Vega. In a real book, those are the easy part.

Delta you hedge in seconds. Vega and gamma you can see and manage. The risks that actually blow people up are the ones nobody put on a slide.

Dividend risk. A name changes its dividend and a large book of in-the-money options lurches.

Interest-rate risk. Everyone forgot about it during the years rates sat at zero and books got sloppy. When rates moved, a lot of people found out the hard way that rho was sitting under the hood of every long-dated trade.

Far out-of-the-money strikes that are worth almost nothing on expiry. The ones you forgot about. They suddenly come back to life on a badly timed news print and you find out you were short way more risk than the position sheet suggested.

I've seen far more damage done by the risks people weren't watching than by the ones they were. Most of your attention goes on the textbook Greeks. A lot of the real damage tends to come from the ones nobody worried about.

For me, the lesson is to respect the boring risks. Dividend, rate, deep OTM convexity, settlement, borrow. Each one quiet most of the time. Each one capable of taking a clean book and turning it into a mess in a single session.

The thing that gets you is rarely the thing you're staring at.

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P.S. A book that respects the boring risks is the one that's still around for the big trades.