NO.PZ2015121810000058
问题如下：
An ETF’s reported tracking error is typically measured as the:
选项：
A. standard deviation of the difference in daily returns between an ETF and its benchmark.
B. difference in annual return between an ETF and its benchmark over the past 12 months.
C. annualized standard deviation of the difference in daily returns between an ETF and its benchmark.
解释：
C is correct. An ETF’s tracking error is typically reported as the annualized standard deviation of the daily differential returns of the ETF and its benchmark.
