NO.PZ2018120301000022
问题如下：
Molly notes that SD&R generally uses actively managed portfolios designed to earn a return in excess of the benchmark portfolio. For clients interested in passive exposure to fixed-income instruments, SD&R offers two additional approaches.
- Approach 1: Seeks to fully replicate a small range of benchmarks consisting of government bonds.
- Approach 2: Follows an enhanced indexing process for a subset of the bonds included in the Bloomberg Barclays US Aggregate Bond Index. Approach 2 may also be customized to reflect client preferences.
选项：
A.minimizes tracking error.
B.requires less risk analysis.
C.is more appropriate for socially responsible investors.
解释：
Correct Answer: C
C is correct. Enhanced indexing is especially useful for investors who consider environmental, social, or other factors when selecting a fixed-income portfolio. Environmental, social, and corporate governance (ESG) investing, also called socially responsible investing, refers to the explicit inclusion or exclusion of some sectors, which is more appropriate for an enhanced index strategy relative to a full index replication strategy. In particular, Approach 2 may be customized to reflect client preferences.
tracking error不是收到追踪的数量多少和成本低影响吗，pure index 的成本高，那么对应的enhance index应该是最小化tracking error，为什么不对呢
