Trading provides some of the highest rewards available in our economy, but they are highly uncertain, and attaining them entails predicting the future and taking huge risks. So it may be dopamine that delivers the powerful high traders feel when their trades work out. It is no wonder many observers suspect that traders on a roll may be in the grips of an addiction. And like an addict who quickly habituates to a given dose of a drug and has to continually increase the hit, traders too may habituate to certain levels of risk and profit, and be irresistibly compelled to up their position size
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