In May, a 13F filing revealed that Berkshire Hathaway was buying mystery stocks. Now, at last, we know what they are.

TheStreet. Warren Buffett is arguably the most successful investor of all time. He's amassed an amazingly massive net worth by buying and usually holding stocks for the long haul. Trained under legendary value fund investor Benjamin Graham,

Housing experts weigh in on the state of mortgage rates and how the Federal Reserve may provide some relief by the end of the year.

It’s that one decision Buffett says you can’t afford to ignore. Integrity is such a non-negotiable aspect of Warren Buffett’s business practice that he vows the key to success is to associate only with people who possess it. He once said:

Leveraged positions in the stock market jumped 18% in one month and topped $1 trillion for the first time. Increasing use of debt to invest can tell us a lot about investors' attitudes. And while this has always been the case,

Buffett owned UnitedHealth shares before selling his stake in 2010, though his Berkshire Hathaway recently acquired shares.

Warren Buffett warns that while markets reward proactive investors, they are unforgiving toward those lacking knowledge or discipline.

OhIn a world where you can buy a Peloton with one click and spend $17 on a smoothie, it's no surprise Americans love credit cards. But billionaire investor Warren Buffett? Not a fan. Speaking at the Nebraska Forum back in 1999,