Annual percentage yield (APY) is the effective annual rate of return on an investment. Learn how it accounts for compounding interest and how it differs from APR.

Discover how annual percentage yield (APY) impacts your CD investments and learn to compare rates for maximizing returns, with tips on calculating and understanding APY.

The Rule of 72 is a shortcut or rule of thumb used to estimate the number of years required to double your money at a given annual rate of return and vice versa.

Warren Buffett says living in America, his “lucky genes,” and the power of compound interest shaped his success. Here’s what he means—and how these forces can help influence your own financial future.

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.

Learn what the stated annual interest rate is and how to calculate it without compounding, plus how it compares to the effective annual rate.

Learn about per diem interest, how it's calculated, its role in loans like mortgages, and why it's essential for borrowers to understand before closing a loan.