Fees
The Isometric treasury keeps up to 3% of the premium a trader pays. The pool keeps the rest, and that share is everything the protocol takes.
Your balance is never charged. There is no fee to deposit or withdraw, and no annual or performance fee on what your shares are worth.
The pool is paid first
A trader's premium is the pool's price for the position plus a 3% trading fee. The pool always receives at least its full price. The treasury's share comes out of the fee on top, which is why it is "up to" 3% rather than fixed at it.
Reading the APY
30d APY is how much a pool share grew over the last 30 days, after trader payouts and the treasury's share, shown as a yearly rate. How the yield works explains the calculation and its limits.
Network fees
You pay network fees on Arbitrum or Robinhood Chain, in ETH, for your own transactions:
| Action | Transactions |
| Deposit | Approve USDG, request the deposit, then claim your shares |
| Withdrawal | Request the withdrawal, then claim your USDG |
| Cancel | One transaction |
The hourly fill itself is sent by Isometric's keeper, which pays its own network fees. Anyone else can send it too. Neither you nor the pool pays for it.
Can the share change
The treasury's share and the trading fee are parameters. Governance can change them, but each can never exceed 20%, a ceiling fixed in the contract code.