Which one of the following statements is incorrect regarding the margining of exchange-traded futures contracts?
A. Day trades and spread transactions require lower margin levels.
B. If an investor fails to deposit variation margin in a timely manner the positions may be liquidated by the carrying broker.
C. Initial margin is he amount of money that must be deposited when a futures contract is opened.
D. A margin call will be issued only if the investor's margin account balance becomes negative.