@root0 $AMZN $MSFT $AAPL $GOOG/L - these 4 tech companies control ~20% of the overall S&amp;P 500, Amazon with $1.2 trillion market value now accounts for more than 40% of the entire value of the S&amp;P 500 consumer-discretionary sector and ~4% of the overall S&amp;P500. Hope this explains.