The margin requirement on the S&P 500 futures contract is 10%, and the stock index is currently 1,700. Each contract has a multiplier of $250.

a. How much margin must be put up for each contract sold?

Margin $

b. If the futures price falls by 1% to 1,683, what will happen to the margin account of an investor who holds one contract? (Input the amount as a positive value.)

Margin account (Click to select)increases or decreases by $ .

c-1. What will be the investor's percentage return based on the amount put up as margin? (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.)

Percentage return %

c-2. What would be the current cash balance in the margin account?

Cash balance $