You may recently have read the outstanding, in-depth article from Sports Illustrated โ€œSports Genes,โ€ by David Epstein, who points out that โ€œgood genesโ€ donโ€™t necessarily equate to athletic success. Take Ethiopian runner Haile Gebrselassie, the world-record holder in the marathon and perhaps the greatest distance runner ever, who, at age five, ran six miles each way to school because thatโ€™s how you got to school in Ethiopia. โ€œEvery day is running. Every job is running: working in the fields or just getting somewhere. Life is running,โ€ says Gebrselassie.

Just as Gebrselassie wasnโ€™t born a world-class runner, you probably werenโ€™t born great at your chosen profession. Chances are, your life was dedicated to working to support your family, and you got good at what you did. Investing in you was your greatest investment. Now, as retirement beckons, you want to keep what youโ€™ve made. Yet great investing comes from a lifetime of dedication, not just part-time or on weekends. In addition, the average investor, or John Bull, tries to do too much. Charles Kindleberger writes in his classic Manias, Panics, and Crashes: A History of Financial Crises, โ€œJohn Bull can stand many things, but he cannot stand 2 percent.โ€

A life of investing gives you seasoning others may lack. Take stop-losses as an example. In theory, a position is sold when a stock falls to a specified level, locking in gains. Stop-losses sound good on paper until the unexpected occurs, like the May 6 flash crash that triggered a machine-gun-like tat-tat-tat-tat-tat of executed stops. Those who forfeited their positions may have been too gun-shy to get back in, and missed out when the market rebounded the following week. My advice is not to play around with stops. Simply have the right amount of money in bonds and you wonโ€™t be faced with having valuable dividend-paying positions prematurely sold.

A life of investing gives you an eye for whatโ€™s important and whatโ€™s not. In a groundbreaking study, โ€œValuation-Indifferent Weighting for Bonds,โ€ Robert Arnott compares bonds in a typical market-weighted 500-bond index to his composite based on companiesโ€™ assets, dividends, cash flow, and sales for the period January 1997 through December 2009. Compared to the performance of an index of investment-grade corporate bonds, his composite outperformed by 0.40% per year. And of the four metrics, is it any shock that dividends had the greatest positive impact on returns by over half a percent per year? Thatโ€™s a significant margin.

If your life hasnโ€™t been dedicated to investing, thereโ€™s little reason why you should be a great investor. Sometimes success can be falsely credited to genius, or โ€œgood genes,โ€ and not the everyday effort of a lifeโ€™s work.