💰Fees
opt.fun implements a maker-taker fee model designed to incentivize liquidity provision while maintaining competitive trading costs.
Fee Types
Maker Fees (-2.00% of option premium)
Definition: Fees paid to traders who add liquidity by placing limit orders
Purpose: Encourages liquidity provision by offering compensation
Collection: Added to collateral when limit orders are filled
Taker Fees (7.00% of option premium)
Definition: Fees charged to traders who remove liquidity by placing market orders or crossing the spread
Purpose: Compensates for immediate execution and liquidity consumption
Collection: Deducted from collateral at order execution
Liquidation Fees (0.10% of notional exposure)
Definition: Fees charged to traders who have their positions liquidated
Purpose: Encourages trade unwinding prior to liquidation
Collection: Deducted from collateral at position liquidation
Fee Calculation
For Buyers
When buying options, fees are calculated as:
Total Cost = Option Premium x (1 + Fee Rate)Example:
Option Premium: 100 USDC
Notional Exposure: 5000 USDC (50x leverage)
Taker Fee Rate: 7.00%
Total Cost: 100 x (1 + 0.07) = 107 USDC
For Sellers
When selling options, fees are calculated as:
Net Premium Received = Option Premium x (1 + Fee Rate)Example:
Option Premium: 100 USDC
Notional Exposure: 5000 USDC (50x leverage)
Taker Fee Rate: -2.00%
Net Received: 100 x (1 - 0.02) = 98 USDC
Fees are only charged when an order is matched. Unfilled limit or market orders are not charged a fee. The fee structure is designed to be competitive with centralized options platforms while maintaining the security and transparency benefits of decentralized trading.
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