Over time, studies show, about 80% actually under-perform the index.
研究发现，长时间来看，大约80%的共同基金表现弱于大盘。
2
Therefore, the performance of the securities underlying the ETF as measured by its NAV may outperform or under-perform the index.
因此基金所持证券的表现(以资产净值量度)，可能优于或落后于有关指数。
3
This is the same point Lesa Mitchell made in women entrepreneurs are trapped in glass walls — that “womens’ startups under-perform on key measures of growth.
这和Lesa Mitchell在“女性创业者作茧自缚”(womenentrepreneurs are trapped in glass walls)中提到的不约而同：女性创业者在重要指标上都比男性表现差。