January 19, 2007, Newsletter Issue #50: You can be successful with a winning percentage of under 50 percent

Tip of the Week

Renowned investing and trading coach Dr. Van K. Tharp addressed the issue of winning percentages in the November 1997 issue of Technically Speaking, the newsletter of the Market Technicians Association. In his article, "Why It´s So Difficult for Most People to Make Money in the Market," Dr. Tharp states, "Most of us grew up exposed to an educational system that brainwashes us with the idea that you have to get 94-95% correct to be excellent. And if you can´t get at least 70% correct you´re a failure. Mistakes are severely punished in the school system by ridicule and poor grades, yet it is only through mistakes that human beings learn. Contrast that with the real world in which a .300 hitter in baseball gets paid millions. In fact, in the everyday world few people are close to perfect and most of us who do well are probably right less than half the time. Indeed, people have made millions on trading systems with reliabilities around 40%."

It should be noted that Dr. Tharp is not specifically referring to options trading in his discussion of winning percentages. In fact, you should expect winning percentages for option premium buying to be lower than that for trading stocks or futures. Our research shows that successful short-term options traders are correct on roughly 35 to 40 percent of their trades. Although this win rate may seem rather low, there are factors such as fighting time decay and preserving capital by shutting down losing trades beyond a certain point (some of which may ultimately have been winners) that are particularly relevant to options trading. The important point is that positive overall returns over the longer haul result from allowing your profitable trades to run and cutting your losses in other trades relatively quickly.

The concept of limiting losses and letting the winners run cannot be overstated. In his classic work, The Battle for Investment Survival, Gerald Loeb states, "Accepting losses is the most important single investment device to insure safety of capital. It is also the action that most people know the least about and that they are least liable to execute ... The most important single thing I learned is that accepting losses promptly is the first key to success." In addition, Loeb says, "The difference between the investor who year in and year out procures for himself a final net profit and the one who is usually in the red is not entirely a question of superior selection of stocks or superior timing. Rather, it is also a case of knowing how to capitalize successes and curtail failures."

Our trading goals follow these principles in that we strive to maintain a winning percentage of between 30 and 40 percent. At the same time, we manage our recommendations such that our winning trades gain far more than our non-winning trades lose.

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