Marsh & McLennan (NYSE:MMC) has outperformed the market over the past 15 years by 3.99% on an annualized basis producing an average annual return of 15.76%. Currently, Marsh & McLennan has a market capitalization of $111.68 billion. Buying $1000 In MMC: If an investor had bought $1000 of MMC stock 15 years ago, it would be worth $9,254.28 today based on a price of $227.10 for MMC at the time of writing. Marsh & McLennan’s Performance Over Last 15 YearsFinally — what’s the point of all this? The key insight to take from this article is to note how much of a difference compounded returns can ma…