Covered calls can lower portfolio volatility and increase returns, as shown by studies from the University of Massachusetts and an asset consulting group, which demonstrated superior performance compared to benchmarks. Over 15 years, a buy-write strategy significantly outperformed the Russell 2000 with less volatility, while a 23-year study indicated that covered calls yielded higher annual returns and lower volatility than the S&P 500. For more information, resources like tutorials and newsletters are available at borntosell.com.