Yield fundamentals

An annualized percentage only becomes useful when its definition, denominator, period, and cost treatment are clear. This collection covers the arithmetic behind compounding and the practical discipline of comparing different products without hiding their differences. Read APY versus APR first for rate conventions, then move to the comparison framework for access, risk, and intended use.

A consistent formula cannot make unlike investments equivalent. The guides keep illustrative arithmetic separate from product promises, and each links to the underlying methodology for review. Use them alongside a dated record of the actual terms you are evaluating.