@le2016mon1 $MSFT, $AAPL, $AMZN, $FB and $GOOG, which together make up 21.2% of the S&amp;P 500, have a market cap of $6 trillion today vs. $1.1 trillion on Dec. 31, 2012. The MSCI U.S. Index has a market cap of $27.4 trillion now vs. $13.4 trillion at year-end 2012.