In the film "My Cousin Vinny", after displaying his wholly unexpected talent for eviscerating the testimony from each of the prosecutions witnesses, Vinny remarks "I'm done with this guy".  

Being "done" with a trade should not be confused with being done with a particular security. I find, however, that in my own trading when I finish a trade and move on, I have a tendency to wholly disregard the vehicle I was just trading and go looking for other fish to fry. This, of course, tends to be a mistake. I'm not sure what biases are at play here, it seems like some sort of completion bias. (The closest thing I could find to it is the Zeigarnik effect which states that people remember uncompleted or interrupted tasks better than completed tasks).

I find this phenomenon occurs in my trading regardless of whether my last trade was a winner or not.





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