$USDC Coinbase Exchange uses a maker-taker fee model for determining its trading fees. Orders that provide liquidity (maker orders) are charged different fees than orders that take liquidity (taker orders). Fees are calculated based on the current pricing tier you are in when the order is placed, and not on the tier you would be in after a trade is completed. Your fee tier is based upon total USD trading volume over the trailing 30 day period. Total Volume does not include volume for trading Stable Pairs. Transactions made on books quoted in USD, e.g. BTC-USDC, are counted as the total USD amount of each filled order. Transactions made on non-USDC books are converted to USDC based on the most recent fill price on the respective book. For example the USDC volume of a purchase of 1 ETH on the ETH-BTC book, will be immediately converted based on the most recent fill price on the ETH-USDC book.

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