This is a preview of the Shortform book summary of The Mental Game of Trading by Jared Tendler.
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In The Mental Game of Trading, Jared Tendler argues that trading is a mental game that requires emotional control and discipline. He believes that many traders struggle with psychological issues that hinder their performance, such as fear, greed, and overconfidence. Tendler provides strategies to help traders identify and overcome these mental barriers, ultimately improving their trading results.

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The Mental Game of Trading Summary Core Concepts for Trading Psychology

The first core concept is that the psychological aspect is crucial for trading success. Tendler defines this psychological strategy as the emotional aspect of trading. The term "game" suggests there are strategies and rules to improve, rather than just a one-time fix.

According to Tendler, the mental game is vital because emotions can impact your decision-making process. They can drive your most negative urges and even stop you from making decisions altogether. Without understanding the mental framework, you can't consistently fix your errors.

(Shortform note: Tendler’s claim that the psychological aspect of trading is crucial is supported by research. In a 2005 study, Andrew W. Lo and Dmitry V. Repin monitored professional traders’ heart rate and skin conductance in real time. They found that these psychological signals covaried with, and in some cases anticipated, changes in trading performance. This suggests that the emotional side of trading is structurally linked to outcomes, rather than being mere background noise.)

We will now discuss frequent mistakes, how emotions...

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The Mental Game of Trading Summary Methods to Solve Flaws and Achieve Better Performance

To resolve flaws and enhance performance, Tendler suggests building mental fortitude and determination to strengthen your discipline. He says that mental fortitude is the force supporting the reasoning for your routines, whereas willpower fuels the repeating required to create those routines.

Tendler argues that by urging yourself to show discipline during difficult periods, you can boost your willpower and mental strength. If you feel the urge to succumb to being undisciplined, strive to improve. Meanwhile, reinforce the reasoning behind the habit.

(Shortform note: Tendler’s advice to urge yourself to show discipline during difficult periods may backfire if you interpret it as pushing yourself harder regardless of your mental or emotional state. In The Willpower Instinct, Kelly McGonigal explains that self-criticism is consistently associated with less motivation and worse self-control. Both guilt and stress tend to undermine the very self-discipline we are trying to strengthen by shifting the brain into a state that favors immediate relief and short-term rewards over our long-term goals.)

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The Mental Game of Trading

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Shortform Exercise: Emotional Patterns and Trading

Consider how emotions influence your trading decisions and performance. This exercise focuses on understanding and disrupting emotional cycles.


Reflect on a recent trading experience where emotions influenced your decision. What specific emotion was most prominent, and how did it impact your decision-making?

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