Alice longs ETH at 2x leverage with 2,000 USDC as collateral. The USDC in the pool goes up from 400,000 to 404,000. How much ETH will she receive in exchange? - The new value of ETH in the pool goes from 100 to 99.01 (using x*y = k; 100*400,000/404,000). Therefore, Alice receives 0.99 ETH in exchange for USDC 4,000, equalling an average trading price of USDC 4,040.4.