One dealer position explains both VIX mechanics
The VIX usually bleeds into its expiry. When it does go, it goes violently. The same dealer positioning explains both.
That's the setup worth understanding.
Dealers are short a load of VIX upside calls, say around the 20 strike and above. To hedge that short-call exposure, they buy VIX futures against the position.
In a calm world, those calls just melt away with time decay. As they melt, the dealers keep offloading the futures they no longer need to hold. That's the quiet drip lower you see into most VIX expiries.
That's the sag. It's mechanical. Same book, same decay, month after month.
Now give the market an actual reason to panic.
As spot VIX climbs toward those short strikes, the dealers' position flips underneath them. What was a 30-delta call becomes a 40-delta, then a 50-delta. They're short gamma. The hedge that used to be excess futures they were offloading suddenly isn't enough.
So the dealers start buying futures. Into a rising market. That's how you get a VIX squeeze back above 20 out of nowhere. The same book that was quietly bleeding is now scrambling to catch up.
And it cuts the other way just as fast.
The moment a catalyst lets the air out, all that emergency hedging unwinds. Dealers dump the futures they had to buy in a hurry. VIX collapses in one direction as fast as it squeezed in the other. Same book. Same reflex. Opposite outcome.
For me, the lesson is that the same short-call inventory explains both the slow bleed and the violent spike. The book stays constant. The spot's location relative to the short strikes is what shifts between the two regimes.
The framework I built across 20 years on bank options desks is below.
That's why this game is genuinely hard.
The options positioning tells you what the terrain looks like. It doesn't tell you exactly what will happen. You still have to navigate through it. The dealers' short-call book is a map. Reading the map still needs a trader on top of it.
Knowing the setup gives you a huge advantage over the trader who's just watching the VIX print without understanding why it moves the way it does. What you do with that advantage is a separate question.
If you want to skip the masterclass and jump straight into our course, the Options Insight Advantage, this is the link.
Imran
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