NO.PZ2022081802000080
问题如下：
Caitríona Daosri is a portfolio manager for an international bank, where she advises high-net-worth clients. Daosri is meeting with a new client, Estêvão Kai, a 40-year-old surgeon with €4 million across various accounts and a salary of €500,000 per annum. Kai explains to Daosri that he has four accounts at four different banks, each with specific sources and uses of funds, as shown in the following table:
选项：
A.Concentrated portfolio positions
B.Forgone opportunities to reduce risk by combining assets with low correlations
C.Excessive trading
解释：
SolutionB is correct. The most common consequence of mental accounting is neglecting opportunities to reduce risk by combining assets with low correlations, because each account’s asset allocation is examined discretely. Offsetting positions across accounts, or an overall inefficient allocation with respect to risk, can lead to suboptimal aggregate performance.
麻烦解释一下选项A，看起来和B类似
