A Common S&P 500 ETF Blunder That's Costing Investors Money

The article highlights that many S&P 500 investors damage their long-term returns by emotionally reacting to market volatility—selling after prices drop and buying back after recovery. Studies show average investors earn less than 4% annually versus the S&P 500's 10.3%, demonstrating that staying invested and avoiding market timing is crucial for wealth building.