Fees

The bankroll liquidity pool will make its long-run profit by charging small transaction fees per trade, acting the same way as an exchange.

Fees are charged based on a positions margin used and not the nominal value of the position.

$$fee = rate * margin\;used$$

For example if a user opens a position for 1,000 units at a price of $10 per unit for a total order value of $10,000 but the margin used is only $1,000, assuming a fee rate of 1%, a user will only be charged a fee of $10 (equivalent to a fee of 0.1% on the nominal value).

Crypta uses the following aggregate market fee structure which acts similar to a market maker-taker fee schedule. The fee schedule is built to encourage traders to open positions to bring the market to equilibrium and minimize bankroll exposure.

Aggregate Market	Long Fee	Short Fee
>1.00% Long Exposure	1.80%	0.20%
>0.75% Long Exposure	1.60%	0.40%
>0.50% Long Exposure	1.40%	0.60%
>0.25% Long Exposure	1.20%	0.80%
Equilibrium (<0.25% Bankroll Exposure)	1.00%	1.00%
>0.25% Short Exposure	0.80%	1.20%
>0.50% Short Exposure	0.60%	1.40%
>0.75% Short Exposure	0.40%	1.60%
>1.00% Short Exposure	0.20%	1.80%