Obsessive Compulsive Disorder. Some people fixate/obsess/over focus on their daily routines and/or thoughts. They want things to feel just right at first or else things won't work out in the end. Some people need to turn the lock on the door multiple times to know it will be locked while they sleep. Some need to check the stove over and over to feel safe before bed time. There is something wrong with the correction function part of the brain...its over active and needs to be calmed by the chemical serotonin. The obsessive part of the brain might come in handy for traders who need to do a lot of research and find that elusive trading edge! Do you spend a lot of time pouring over data late into the night and don't want to stop...it feels like a high/drug? Most INTJs tend to have OCD to some degree...they have this very intuitive mind that tells them the flaws or dangers in everything they see/do. With that deep processing going on its no wonder we have to check all possible outcomes constantly...this comes with much anxiety and if it continues too much/too long depression can set in. If you find that you are self medicating with alcohol or carbohydrates/sweets/starches to calm your wired mind, you probably have OCD.
I'm curious about some of the members on ET and their type. Marketsurfer has some stubbornness to him and a sense of status...he also has that journalist/teaching flair. Could be ENFJ or ESFJ. Volpunter has a reactive mind to stupidity/incompetence and has a sense of status as well. Probably ENTJ (D.Trump type),ESTJ(big boss), ISTJ(most anal) or INTJ(always right). For INTJs information is power and the path to an edge. Typing your personality is self reflection that can only improve oneself for any endeavor...no matter what type you are. Everyone should take the test and see what happens...take a chance!
A type that is disinterested in the subject...that's all. You may be a sensing person that gets bored with theory. Sensing people like the here and now...facts...proven methods...the known...the tangible.