单选题 Which of the following statements regarding financing bond purchases with margin accounts is FALSE? A. The required margin percentage changes daily. B. Individuals are more likely than institutions to use margin accounts to finance bond purchases. C. In the U. S. , margin accounts are regulated by the Federal Reserve.

【正确答案】 A

【答案解析】The margin percentage is fixed by contract. The required margin dollars may vary from day to day due to fluctuations in the underlying collateral.