Gamma Squeeze (Quick Explanation)
A gamma squeeze happens when heavy call option buying forces option sellers (often market makers) to
buy shares to hedge. As the stock rises, the hedge requirement can increase quickly (gamma), which can create a
feedback loop of more share buying → higher price → even more hedging.
The term "Gamma Squeeze"
exploded into mainstream finance during meme-stock chaos (GameStop, AMC, etc.).
People usually mention it to explain “why did this stock go vertical when nothing changed?”
Important: A gamma squeeze is options mechanics interacting with liquidity and positioning.
It’s not magic — and it can reverse fast.
What Is a Gamma Squeeze?
A gamma squeeze is a rapid price move that can happen when:
The key idea is that hedging flows can become a self-reinforcing loop.
- Traders aggressively buy call options, often close to the current price.
- Option sellers (often market makers) hedge by buying the underlying shares.
- As the price rises, the hedge requirement can increase quickly due to gamma.
The key idea is that hedging flows can become a self-reinforcing loop.
How It Works (Step-by-Step)
Here’s the simplified mechanics:
- Call buying spikes: traders buy lots of calls (often short-dated).
- Market makers hedge: to reduce risk, they buy shares.
- Delta rises with price: as the stock rises, calls become more sensitive to price (delta increases).
- Gamma accelerates hedging: delta changes faster near key strikes → MMs may need to buy more shares quickly.
- Feedback loop: buying pushes price up → price up increases hedging → hedging pushes price up.
Plain-English version: call buying can “pull” share buying behind it, because option sellers try not to get wrecked.
Why “Crossing Strikes” Can Matter
Gamma effects often get more intense around big, obvious strike prices (like 50, 100, 150) when open interest is high.
When price approaches/crosses these strikes, hedging needs can change quickly — especially into expiration.
Reality Check: Gamma Squeezes Cut Both Ways
Even when the squeeze story is “true,” squeezes are fragile because the same mechanics can reverse:
That’s why meme-stock moves often look like a rocket up… and an elevator down.
- If call buying slows, hedging demand can fade.
- As options expire, the hedging flows can drop off suddenly.
- When price falls, deltas fall — which can trigger selling from hedgers.
That’s why meme-stock moves often look like a rocket up… and an elevator down.
FAQ
Is a gamma squeeze the same as a short squeeze?
Not exactly. A short squeeze is driven by short sellers buying shares to cover.
A gamma squeeze is driven by options hedging (often market makers buying shares).
They can happen together — and that’s when things get extra violent.
Why do market makers buy shares when calls are bought?
Because if they sold calls, they’re exposed if price rises. Buying shares helps neutralize that exposure.
The amount they buy depends on delta — and how fast delta changes depends on gamma.
Can gamma squeezes happen on any stock?
They’re more likely when options volume is heavy, liquidity is thin, and open interest clusters around key strikes.
Related Reading (Internal Links)
Conclusion
A gamma squeeze is basically options flow + hedging mechanics creating a feedback loop.
GameStop is the poster child because call buying + positioning + hype created repeated episodes of “forced” share demand.
Just remember: when the flows stop, the squeeze can stop too.