Quote from MAESTRO:
Markets are usually compared to a poker game. However, there are many other games that can shed some light on the marketâs underlying forces and, therefore, on market participantsâ psychology.
Letâs take a look at the blackjack game played in casinos. What I have discovered is the âhiddenâ casino advantage that has lots of similarities with the market.
In the casino the dealer is your opponent and her strategy is set by the casino and cannot be changed: the dealer would continue to take cards until the sum was 17 or more, in which case she would stick. In other words, the dealer plays by the algorithm written for her by the developers of the game. What would happen if I played exactly the same game? It would occur on the surface that the probability of me winning each hand is 50% and on the long run I would neither win nor lose. However, I could have a nice evening; drink all of the free vodkas served by the lovely cocktail waitresses, have some fun and it would not cost me a dime. Also, I would catch the time that I am up and quit with a few dollars left in my pocket. Wouldnât that be nice! Not so fast though; everybody knows that the house always has the advantage, but how? Is it because the dealers got to see your cards, but you did not get to see theirs? Is it because I have to decide whether to take a card before the dealer or not? But the strategy of sticking at 17 does not require looking at any cards other than your own, so who sees whose cards or who sees them first is irrelevant.
Well, as everybody who played this game knows if I asked for a third, fourth etc. card and it added up to more than 21 the dealer immediately would grab your money declaring that I have lost the hand. Only when no one else at the table wants another card, the dealer reveals her cards and their sum, at which point she could also bust, but if my hand is already lost it wouldnât matter to me. Technically, if I busted and the dealer also had more than 21 we are tied. But it is not the case in the casino.
The casinoâs advantage is simply that I would always lose when my hand adds up to more than 21; yet the dealer only can lose when I did not. So, according to Bayesian conditional probabilities formula there are more chances for me to lose then for the dealer.
But why is it so hard to see? Well, it is because the probabilities skew is hidden in time! The timing of the decision makes all the difference. The markets have the same hidden rule, but unlike casinos they are not immune from me exploiting it.