Who cares. AAPL makes up 20% of QQQ (4% of SPY). Yes AAPL influences QQQ but it they both still move independently of one another. Just look at both their charts. Anything less than the market cap of AAPL, which is all stocks, has an insignificant effect to any index it is a part of.Quote from xtrader99:
Do you know where I can find a service that would list all the ETFs and Indexes that a particular stock belong to?
For example, I would like to find out all ETFs that has AAPL as one of its components...