relative error relative error
相对误差
以上为机器翻译结果，长、整句建议使用 人工翻译 。
However, as index-based mutual funds and ETFs continue to gain popularity and active managers are increasingly pressured to control their performance tracking error relative to benchmark indexes, the markets could become less efficient.
FORBES: Equal-Weight Indexers Didn't Suck Wind For A Decade
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