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全体G股相对大盘获得19．46％的“超额收益”。但G股不同时间段上市日的“超额收益”差异显著。从2005．9．8至2005．12．9上市的G股一致地表现出低收益率的现象,这种“洼地”现象并没有得到有效填充。
All G shares relative market access to 19.46% of the “excess return.” However, there were significant differences between the “excess returns” of G shares listed on different dates. The G shares listed from 2005.9 to 2005.12.9 unanimously showed the phenomenon of low rate of return. This “depression” phenomenon has not been effectively filled.