该项研究称，市值加权指数效率不高不足为奇，因为它会导致投资组合集中，主要成分股是10到30家市值最大的上市公司。
The poor efficiency of capitalisation-weighted indices was not surprising , said the research , given that it leads to concentrated portfolios , with the 10 to 30 largest stocks dominating .
市值加权指数