Berkshire Hathaway just boosted its stake in the iPhone maker by 55%—but not for the reasons you may think.

Shake Shack's stock sinks 10% after falling short on sales.

A six-year sales run starts to sputter.

Investing a portion of Social Security assets in stocks can reduce funding shortfalls, a new study finds.

With interest rates at rock bottom, income-hungry investors have been throwing billions at dividend-paying stocks. Now, the nation's largest mutual fund company by assets is turning some of them away. On Thursday, Vanguard Group said...

Could stocks that aren’t too big or too small be just right for your portfolio?