How Short Squeezes Change Equity Options Market-Making Risks
Summary
The article explains how a short squeeze develops and why it creates unusual risks for equity options market makers. Short sellers may be forced to buy shares to meet margin requirements or return recalled stock, adding buying pressure as prices rise. Market makers generally aim to earn spreads while keeping portfolio risk close to neutral, using related instruments to hedge when possible.
When options trades leave a market maker short a particular contract, they may hedge with nearby strikes or expirations, creating linked price effects across options. A squeeze makes this harder: rapid price moves can disrupt delta hedges, high implied volatility raises the cost of options exposure, and listed strikes may not extend far enough to hedge. Borrow scarcity and early exercise of American calls can add further pressure. The article uses GameStop as context and gives a hypothetical strike example, but it is an explanatory overview rather than a measured study. It contrasts these equity risks with Deribit crypto options, where European exercise and liquid futures and swaps can reduce some squeeze-related constraints.
Key ideas
- Short sellers can be forced to buy shares when margin limits or stock recalls require them to close positions.
- Options market makers seek to capture bid-ask spreads while hedging their directional and nonlinear exposure.
- Market makers may use nearby strikes and expirations to manage option risk when they cannot offset the exact contract.
- A short squeeze can make hedging difficult through fast price moves, high volatility, scarce shares to borrow, and gaps in listed strikes.
- American call exercise can require a short-call market maker to deliver shares, potentially adding to buying pressure.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.