Investors have been on a roller coaster ride for the past four years. One of the longest bull markets in history was brought to a screeching halt by the global pandemic. The S&P 500 lost over one-third of its value in a matter of a few weeks.Yet immediately afterward, the popular benchmark index rocketed higher, more than doubling in value over the next 21 months. It then lost a quarter of its value again before turning north once more and running 50% higher. You’re not alone if you’ve experienced vertigo d ...