单选题 Which of the following is an assumption of capital market theory? All investors: A. see the same risk/return distribution for a given stock. B. select portfolios that lie above the efficient frontier to optimize the risk-return relationship. C. select portfolios that lie below the efficient frontier to optimize the risk-return relationship.

【正确答案】 A

【答案解析】All investors select portfolios that lie along the efficient frontier, based on their utility functions. All investors have the same one-period time horizon, and have the same risk/return expectations.