ETF Investors Piled Into the S&P 500 Ahead of Earnings Season

Ahead of the earnings season, ETF investors have piled into broad stock ETFs, revealing their overall optimism for quarterly corporate results ahead. The three largest ETFs that track the S&P 500, including the SPDR S&P 500 ETF (NYSEARCA: SPY), iShares Core S&P 500 ETF (NYSEARCA: IVV)...