A simple interest loan only charges interest on your original principal, not the entire balance. You'll often see these for car or personal loans. Keep reading.

^SPX data by YCharts. But this correlation isn't as simple as saying the stock market declines every time the Fed cuts rates. Instead, we need to consider why the Fed is cutting interest rates.

Using your rate of return, the Rule of 72 is a simplified formula that measures the effect of compound interest on your investment dollars.

The best high-yield savings accounts help you earn more interest on your cash while keeping your money safe for short-term and medium-term financial goals.

The Charles Schwab Investor Savings Account doesn’t charge monthly service fees and offers unlimited ATM fee rebates worldwide. But you can find higher savings rates elsewhere.