Gamma Squeeze
A rapid, self-reinforcing price surge driven by options market makers who must buy increasing quantities of the underlying asset to delta-hedge as call options move into the money.
The macro regime is unambiguously STAGFLATION DEEPENING. The three-pillar structure remains intact and strengthening: (1) Energy-driven inflation shock — WTI at $104-111, +40% in 1M, flowing through PPI (+0.7% 3M, accelerating) into a CPI/PCE pipeline that has not yet absorbed the full pass-through,…
What Is a Gamma Squeeze?
A gamma squeeze is a feedback loop where rising stock prices force options market makers to buy more stock to maintain their delta hedge, which pushes prices higher, which forces more buying. It is a purely mechanical, options-driven price amplification mechanism.
The Mechanics
- Retail or speculative traders buy large quantities of short-dated call options
- Options market makers (dealers) sell those calls and delta-hedge by buying shares
- As the stock price rises, each call option's delta increases (the option moves deeper in-the-money)
- Dealers must buy more shares to maintain their hedge — this buying pressure pushes prices higher
- Higher prices increase delta further → more buying → prices higher → repeat
This feedback loop is driven by gamma — the rate of change of delta with respect to price. When dealers are "short gamma" (they have sold calls), rising prices force accelerating buying.
Historical Examples
- GameStop (Jan 2021): The most famous gamma squeeze, amplified by a simultaneous short squeeze
- AMC, BB, and meme stocks (2021): Similar dynamics
- Tesla (2020 options expiry): Dealer hedging drove extraordinary price moves
Zero Days to Expiry (0DTE) Options
The rise of 0DTE options (options expiring same-day) has created a new gamma squeeze dynamic. Dealers must hedge aggressively intraday, leading to amplified same-day price swings in both directions.
Gamma Exposure (GEX)
Dealers' aggregate gamma exposure (GEX) can be estimated from options open interest data. Positive GEX (dealers long gamma) acts as a stabiliser — dealers buy dips and sell rips. Negative GEX (dealers short gamma, having sold many calls) acts as an amplifier — price moves in either direction are reinforced.
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