Steven Crist - Pari Mutuel Systems
Classic speech on thinking probabilistically: http://www.leggmason.com/thoughtleaderforum/2007/conference/crist.html
“What you really want to do is determine which most-likely winners are good prices and which most-likely winners are bad prices. It is a very simple equation:
Price X Probability = Value
The entire world of investing is that simple too. Here is what I mean. If a horse has a 33 percent change of winning a race, and if you can get odds of 2-to-1 on him (which means tripling your money), there is no value - the horse is priced correctly. If a horse is 6-to-5 (which means you will only get back 120 percent of your bet) and he is only 33 percent to win, then he is a terrible bet. If you’re going to get 4-to-1 (quintupling your money) on a 33 percent chance winner, then it’s a great bet.”