Re: QQQ and Concentration by Capitalization....................... I just saw a note that indicated the QQQ top three holdings represent nearly 25% of the index! [pre]Symbol Percent of Index AAPL ~14.4% MSFT ~ 6.6% GOOG ~ 3.7%[/pre] The next 97 companies only represent 75% of the index value. One more reason to watch Apple (or is that an Apple Watch???)