What happened?

Options dealers are now sitting on their largest negative gamma exposure since the 2020 crash. This isn't just a technical footnote — it fundamentally changes how markets move.

Why it matters:

When dealers are negative gamma, they're forced to sell into declines and buy into rallies. This amplifies volatility in both directions, creating the kind of violent swings that catch most professionals off guard.

The key numbers:

• S&P 500 dealer gamma exposure flipped negative last week

• VIX term structure is in backwardation — the market is pricing near-term fear

• The Fed's next move is now a coin flip between holding and cutting, adding policy uncertainty on top of positioning risk

What smart risk managers are doing:

1. Reducing gross exposure until gamma normalizes

2. Shifting to defined-risk options strategies

3. Monitoring GEX (Gamma Exposure Index) daily — not weekly

Bottom line: When dealers are short gamma, the market doesn't walk — it sprints. In both directions. If your risk framework doesn't account for dealer positioning, you're flying blind.

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