Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Cumulative interest is the total accumulated interest on a loan over a specified period. It ...

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The winner won't see the full amount — at least not all at once. Here's how to play, and what it means if you win.