QQQ
由于一般情况下我不会买ETF，所以也一直没太认真研究过ETF，对他们的组成的原则总是搞不清楚。感觉上好像有时候 为了追求某种比例就有可能卖掉好的股票同时买进不那么好的股票，和基本面没关系。 朋友告诉我说，QQQ以及其他相关或类似的基金在5月2号以前要卖掉好多股的苹果，我自己没去算。
Source: http://nteswjq.blog.163.com/blog/static/126998120113723922225/
QQQ
> By Duan Yongping · his NetEase blog (nteswjq.blog.163.com, now closed; read from web archives) · 2011-04-07 · [Original link](http://nteswjq.blog.163.com/blog/static/126998120113723922225/) ([archived](https://web.archive.org/web/20191022081534/http://nteswjq.blog.163.com/blog/static/126998120113723922225/))
> This post includes letters from others or quoted material; Duan Yongping's own words are marked separately.
Since I generally don't buy ETFs, I've never studied ETFs very seriously, and I've never been clear on the principles of how they're composed. My impression is that sometimes, to hit some ratio, they may sell good stocks while buying not-so-good ones, which has nothing to do with fundamentals.
A friend told me that QQQ and other related or similar funds have to sell a lot of Apple shares before May 2nd; I didn't work it out myself.
[Here the original reposted the English ETF Database article; it is not Duan Yongping's words and is not included. See the archived page linked at the top.]
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