Structured-outcome ETFs have garnered tremendous interest from investors in light of the rampant volatility this year. But those defensive-minded funds have also revealed their often overlooked drawbacks – they limit upside gains up to a certain level in order to provide their downside buffer. As a result, the unexpectedly sharp rebound that began in April has whip-sawed investors holding first generation structured-outcome ETFs, and they are now trailing behind as the next leg of the bull market has taken root.