as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
is compounding interest on investments a myth?
user
compound growth isn't a myth, it just takes patience to experience.  a 10% annual return will double the investment not in 10 years, but just over 7.  even though a mortgage claims to use simple interest, if your loan is 5% and there's 14 years to go, $100 extra principal will knock off $200 from the final payment. the same laws of compounding and rule of 72 are at play.
assistant