Fifteen years of tracking by two respected data-analysis authorities show that Lazy Portfolios perform poorly. Beginning on Jan. 1, 2007, the S&P 500 turned $100 into $449 by the end of 2021. Muscular Portfolios generated significantly better ending values: $486 to $523. Lazy Portfolios badly lagged, growing your $100 nest egg to just $193 to $323 in 15 years. See Newsletter #42.