You buy the E-mini S&P500 futures contract on 1/15 when the futures price is 3180. The initial margin is $8,000 and the maintenance margin is $6,000. Following your trade, the market moves in the following manner. Date Settlement Price 1/16 3220 1/17 3170 1/18 3100 1/21 3130 1/22 3140 The daily gain loss on 1/21 is: gain of 2,000 O gain of 3,500 loss of 3,500 O gain of 1,500 loss of 1,500