Discover normal distribution—a critical concept in finance—and its key properties, formula, and real-world applications.

Millions of Americans take billions of dollars in early distributions each year. Early distributions—those taken before age 59 ½—are subject to a 10% additional tax or early distribution penalty.

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Michael Boyle is an experienced financial professional with more than 10 years working with ...

Christy Bieber has a JD from UCLA School of Law and began her career as a college instructor and textbook author. She has been writing full time for over a decade with a focus on making financial and ...