New York (CNN Business) Volatility is back. It's a shock for stock market investors who have enjoyed predictable returns over the past decade. In seven of the past nine years, the S&P has boasted double-digit returns. For buy-and-hold younger workers, their 401(k) has never lost value. On five different days last year the Dow Jones moved 1,000 points or more .

Source: CNN January 04, 2019 18:56 UTC