You forgot: ETF is made by human-being.

来源: mike369 于 2012-06-01 18:44:01 [] [旧帖] [给我悄悄话] 阅读数 : (45 bytes)
回答: 据说： 由 jessefan 于 2012-06-01 18:42:23

Human-being can adjust it at any time.

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