The article suggests that if you invested $1000 in Arch Capital Group (ACG) 15 years ago, it would have been worth $9,154.27. The company has outperformed the market over the past 15 years by 4.17% on an annualized basis, producing an average annual return of 15.76%. Currently, ACG has a market capitalization of $34.00 billion. The article discusses the impact of compounded returns on your future financial stability over the years.