By almost any measure, U.S. stocks are expensive but the bull market shows no signs of stopping. Will it pause? Yes! Will it pull back? Yes! Both events are good for Optik. The amount of money flowing into ETFs is one of the reasons that this market remains on a bull run.
Passively managed ETFs have become incredibly attractive to investors, allowing them to pick and choose baskets of stocks representing different parts of the market. According to industry groups, more than $4 trillion is now invested in ETFs. See: http://www.etf.com/etfanalytics/etf-fund-flows-tool