QQQQ改变了游戏规则

伴随着SP500采取以流通市值计算的方法代替总市值，QQQQ也改变了游戏规则。并且，QQQQ100的计算权重被视作Nasdaq committee的property，不再免费公开,subscriber fee is $10K annually.所以无法计算其影响。

根据：

http://www.nasdaq.com/asp/indexshares.asp?symbol=QQQQ

增加了QCOM/AAPL/EBAY/SBUX 的权重，降低了MSFT/CSCO/GOOG/AMGN/INTC/ORCL的权重。其目的显然是要保持和增强QQQQ的活跃幅度。

Naz只玩20股的策略不变，但跟踪对象的偏重要相应变化。所以要在每个quarter末，check top 10 update:

Data as of 3/31/2006

QUALCOMM Incorporated 6.94%
Microsoft Corporation 6.65%
Apple Computer, Inc. 5.10%
Cisco Systems, Inc. 3.27%
Google Inc. 3.25%
Amgen Inc. 2.85%
eBay Inc. 2.81%
Starbucks Corporation 2.74%
Intel Corporation 2.74%
Oracle Corporation 2.02%
Total 38.37%