Bigger egos tend to get punished in the markets because the market is what is called a "continous process", if you don't actively close out your losing position you can lose forever and even owe money. In poker and gambling in general there is usually a point where the betting stops by itself (you lose all your chips, the sports game you bet on ends and the bets are settled, etc), it whats is called a "discrete event". You have to actively rebuy or bet again, in the market, most bests are forever if you don't close it. This leads to flaws in discipline or ego based mistakes being punished more severly
It is good to hear "continuous process" and "discrete event". Also unlike stock market, ego is another important factor in poker.
In Brick and Mortar poker room, many stupid players tends to play wrong based on his/her ego himself . Even in online poker, almost none use programming.
However it is possible to trade in stock market with no ego, and even no ego permitted.
One example of trading with no emotion is systematic trading with computer program only, to elimainate personal human ego/emotion.
He should not see the market depth and should not order stop loss based on his personal and temporal emotion.
In poker, programming is usually not possible.
Among the many well-known continuous processes, equity prices follow Wiener (Brownian motion) process, if I heard correctly.
Price change (represented by percent, such as today Dow index -2%) follows log-normal.
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