A diversified portfolio is one of the keys to a successful long-term investment strategy. But can your assets ever be too diversified?

John C. Bogle, founder of the Vanguard Group and creator of the index mutual fund for individual investors, died last week. He was 89.

Investing isn't as hard as most people think, but there's a lot of jargon to learn. Stocks and bonds are two common terms that come to mind when you think about investing. Many people don't know the difference, so we're going to break it down.