10% Of S&P 500 Stocks Sink Into 'Lost Decade' — Do You Own Them?

“Stocks always go up,” is a popular adage during an S&P 500 bull market. Too bad it isn’t true. Roughly a tenth of the stocks in the S&P 500 are down in the past 10 years, says an Investor’s Business Daily analysis of data from S&P Global Market Intelligence and MarketSurge. And they’re just part of a surprisingly large group…