- Over the past 20 years, the average annual return of the S&P 500 was 7.8%, but the average equity fund investor earned only 3.5% due to being motivated by fear and greed rather than sound investment practices. - Investors who reacted to market volatility by frequently buying and selling earned lower returns than buy-and-hold investors in the S&P 500 and other major indices. - One of the main reasons for this performance shortfall is that investors are motivated more by emotions like fear and greed rather than following sound long-term investment strategies.