What was born 129 years ago today?What has Mark learned?Have you ever seen the phrase, past performance is no guarantee of future results?What about marketing?What about backtesting?What is an index?How is the Dow Jones constructed?How are the stocks in the S&P weighted?What is the supersized Dow?What about target date funds (TDFs)?Where do TDFs live?What about options?What about make-believe simulations?Does past performance reflect past performance?What about the real-time rapid change in the numbers?What factors should we consider?Why bet your retirement on backtesting?What about historical averaging?What about broader trends and contractual guarantees?What about IULs?What about charts looking at a dollar invested in 1929…?Can you drive your car forward by looking in the rearview mirror?What are the takeaways?