Find out how much you must invest each year to reach $1 million by age 65 with an average annual return of 7%, and learn why time is an investor's best friend.

Compound interest can help turbocharge your savings and investments, or it can quickly lead to an unruly balance, keeping you stuck in a cycle of debt. Its magic can help you earn more — or owe more.

Compound interest occurs when the interest you earn on investments begins to earn interest on itself. Time is the biggest factor in how well compound interest works. An S&P 500 ETF can be the go-to ...