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A firm obligated to continuously quote bid and ask prices for assigned options, providing liquidity. Market makers profit from the bid-ask spread and manage risk through delta hedging.
Key takeawayMarket makers are your counterparty on most trades. Their hedging behavior drives GEX, pin action, and put/call wall dynamics. Understanding them helps you understand the market.

Market makers are the invisible infrastructure of options markets. Their hedging creates GEX, pin action, and put/call walls. Understanding their incentives explains most of the market dynamics premium sellers observe.
Registered firms obligated to continuously quote bids and asks for assigned options. They profit from the bid-ask spread and manage risk by delta-hedging their cumulative exposure. They don't bet on direction — they bet on spreads and manage risk.
A market maker sells 1,000 SPY $580 puts. To stay delta-neutral, they short ~30,000 shares of SPY equivalent. As SPY moves, they adjust — buying on dips (positive gamma), selling on rallies — creating the stabilizing flows you see in calm markets.
Thinking market makers are your enemy. They provide the liquidity you need to trade. Without them, bid-ask spreads would be $1+ on most options. Their hedging is why OTM puts are overpriced — and that's your edge.
A firm obligated to continuously quote bid and ask prices for assigned options, providing liquidity. Market makers profit from the bid-ask spread and manage risk through delta hedging.
Market makers are your counterparty on most trades. Their hedging behavior drives GEX, pin action, and put/call wall dynamics. Understanding them helps you understand the market.
Registered firms obligated to continuously quote bids and asks for assigned options. They profit from the bid-ask spread and manage risk by delta-hedging their cumulative exposure. They don't bet on direction — they bet on spreads and manage risk.
Thinking market makers are your enemy. They provide the liquidity you need to trade. Without them, bid-ask spreads would be $1+ on most options. Their hedging is why OTM puts are overpriced — and that's your edge.
60/40 Tax Treatment
The favorable tax split for Section 1256 contracts: 60% of gains are taxed at the long-term capital gains rate and 40% at the short-term rate, regardless of ...
Adjusted Option
An option whose terms have been modified due to a corporate action — stock split, special dividend, merger, or spinoff.
All-or-None Order
An order that must fill completely or not at all, but unlike FOK, it can wait in the book for a complete fill rather than canceling immediately.
American-Style Option
An option that can be exercised by its holder at any time from listing until expiration.