The significance of these ETFs is that

来源: 于 2011-10-05 14:51:32 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

when the temporary bottom of the market is confirmed,they tend to go up faster in general, which is good for DT and ST.

the individual TA of the ETFs is not as effective as that of the market.