Ratings Volatility Hits US Equity Funds
In the below charts, we show ratings volatility has increased in 2018 for all nine Morningstar US Equity fund categories for both MRAR and Sharpe Ratio.
To demonstrate this trend, we take the top and bottom decile funds in each category as of March in each year (2016-2018). We then calculate the statistic ranking for each fund through the following year by rolling the 10-year window forward monthly.12
(This Appendix appeared in Shifting Stars: Fund Ratings Get Volatile as Financial Crisis Fades From the 10-Year Window)
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