this site has some good research

來源: curiousGeorge2 於 2012-03-23 05:56:32 [] [舊帖] [給我悄悄話] 閱讀數 : (116 bytes)

worth a good reading.

 

http://www.crestmontresearch.com/docs/Stock-Groundhog-Decade.pdf

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