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IBKR's Tiered commission models are not intended to be a direct pass-through of exchange and third-party fees and rebates. Costs passed on to clients in IBKR’s Tiered commission schedule may be greater than the costs paid by IBKR to the relevant exchange, regulator, clearinghouse or third party. For example, IBKR may receive volume discounts that are not passed on to clients. Likewise, rebates passed on to clients by IBKR may be less than the rebates IBKR receives from the relevant market. For example, IBKR may receive enhanced rebate payments for exceeding volume thresholds on particular markets, but typically will not pass these enhancements directly to clients.