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 ...

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).

Discover how to calculate contribution margin, a key profitability metric, by subtracting variable costs from sales revenue. Learn how it impacts business decisions.

A higher Sortino ratio can indicate a good return relative to the risk taken. The Sortino ratio focuses on downside volatility, while the Sharpe ratio considers both upside and downside volatility in ...

Savvy investors look at a company’s financial health before buying its stock. Some investors monitor a company’s free cash flow and review its cash flow statements to gauge how well it manages its ...

Jaguar provided a flight from DC to London and back and a night in a hotel so we could see its new Formula E car and speak to its engineers. Ars does not accept paid editorial content. LONDON—On ...