The perfect portfolio may not look like what you think. A common fallacy is that good active equity funds should deliver consistently good short-term performance with smooth upward trending returns. Investors who believe this have unrealistic expectations and often dump good investments too quickly thereby losing out on great long-term returns.
Even though we all know market fluctuations are a normal part of equity investing, large market declines are scary to most investors because they often happen rapidly and feel random.
One of the most common and costly mistakes made by investors and professionals alike is making panic-related sell decisions. Getting out of the market based on market noise and perceived risks often leads to significant underperformance because it requires impeccable timing with respect to both exiting and reinvesting into the market.