Jul 15 2010
Is it Luck or Skill?
Sometimes it is difficult to tell the difference between luck and skill. This is particularly true in the stock market.
What clouds the issue is our natural tendency to rely on results (“what happened”) to tell us if we made a smart decision instead of determining whether the process for making the decision actually worked. This becomes even more difficult when the situation involves a high degree of risk.
Take Donald Trump for example. “The Donald” is reputed to be a financial genius. Despite his obvious talent, is his reputation the result of a series of brilliant decisions, or has he simply been lucky? His successes in New York City real estate are the stuff of legend but they are somewhat offset by the huge losses posted by his New Jersey casino investments not to mention the recent difficulties with his condo projects in Florida and Dubai. Were these results due to his decisions, lady luck, or a combination of the two?
This distinction is important when “experts” give investment advice. Often the “expert” earned a reputation by making a big bet on the market that turned out to be correct. His followers now expect his advice to lead to similar profitable results. But what if the original “win” was merely a lucky guess?
A long time ago, a client proposed a high risk strategy and asked for my advice. I told him not to do it. As it turned out his bet would have paid off and he called to tell me I was wrong. I responded that despite the fact that he would have won the bet this time, continuing to make such high risk bets would eventually lose him a lot of money. The advice was correct even if, as in this instance, he would have won the bet. I posed the following question to him: “If you were considering taking your retirement money to the race track to bet on the daily double and I advised against it, would you consider that to be bad advice even if your horses came in?”
Not surprisingly, we disagreed about what was the correct answer.
I have often heard people say “I’d rather be lucky than smart” but simply relying on luck is a poor substitute for a logical investment strategy.