问题如下：
Hill refers his friend, Richard Morrison, the former CEO of Masury Bridge and Iron (MBI), to Keller to discuss his wealth goals.
Keller realizes that the Morrisons’ decision making is influenced by psychological considerations and decides to use a goal-based planning approach. Keller constructs the table below to simplify the discussion at their next scheduled meeting.
Table：Morrison Family Wealth Distribution
Determine if the current wealth distribution is consistent with the Morrisons’ stated key objective. Justify your response.
选项： 解释：
The Morrisons’ current distribution of wealth is inconsistent with their stated objective of maintaining their current standard of living. The Morrison family portfolio has 90% of their wealth allocated to MBI stock, which falls into the high risk/high return aspirational risk bucket, and only 10% allocated to the personal risk and market risk buckets. A significantly greater allocation to the personal risk and market risk buckets combined with diversification of the single asset concentration (MBI) would be consistent with the stated goal of maintaining their current standard of living into retirement.
老师，请问这道题的MBI股票指的是什么类型的股票？我记得讲义里相对有二级市场流通性质的股票和bond不是应该在market risk bucket吗？谢谢
