Here’s how the Rule of 72 works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For ...

An annuity is a financial product that provides a stream of income over a set period. Annuities are often used in retirement planning as a way to generate income from a lump sum investment.

Learn what compound interest is, how it’s calculated—from annual rates to continuous compounding—and why it’s powerful for savings (and dangerous for debt).

Warren Buffett and Charlie Munger explain how to calculate intrinsic value, a crucial element of Buffett’s value investing strategy. Learn about long-term investment and future cash flows.