Schizoaffective disorder specialist

You have Reactive Attachment Disorder. And you have Reactive Attachment Disorder. Everyone gets Reactive Attachment Disorder!

PGAD stands for persistent genital arousal disorder, a real disorder.

Couple of slight nitpicky thing, more for fact check and didn't detract for me from this masterpiece.
First, the stock trading stuff. That was my profession and training for decades. Stocks are not a zero sum game. Commodities trading is (so is gambling, etc). You also mentioned he was trading commodities on the stock exchanges. Commodities have their own separate exchanges. He hadn't taken profit while he was asleep, but had a stop-loss. Day traders put in profit taking order and stop-losses at the same time typically because their profit taking point can be hit when they are not watching the screen and move back. Last point, that he couldn't get into another trade because all his money was tied up into that one trade. No successful day trader or investor would be successful in the long term (no matter how good he/she is) will be successful if he was investing everything in one idea (or trade). At the most one should be risking no more than 5% of their investable funds into any one idea or trade. Money management is at least 50% of being a successful trader/investor.
I don't think you got the schizoaffective part right either. I have, unfortunately, become a sort of expert on it because a family member suffers from that particular disorder. Schizoaffective disorder is a combination of schizophrenia and bipolar disorder and it is believed to be likely genetic and starts manifesting itself from teenage years, although early on people see it as that person being kind of quirky (just how they are), but not necessarily mentally ill. Triggers or certain stresses later on (death of a loved one, divorce, etc) ends up bringing it out in full force. Interestingly one of the main symptoms is that they become paranoid that their significant other is cheating on them (when they are not), but of course in this case she had. People suffering from schizophrenic disorder (overwhelmingly women btw and rare in men), they exhibit the false paranoia, delusions and hallucinations of a schizophrenic, and the manic and depressive behavior of someone who is bipolar. While it is treatable with medication and psychotherapy, it is not something temporary that they never have to worry about ever again. It is a lifelong condition, and even when they are doing better through psychotherapy (they learn to spot the triggers as they start to occur) and medication, it's a lifelong struggle as future triggers have the potential to do them in again. Another huge problem for people suffering with schizoaffective disorder is that they will never be convinced that there is something wrong with them, but that their cheating spouse is fooling everyone into believing that they are mentally ill (none of that exhibited by the MC). From the description of the MC's condition I didn't see any of the symptoms of someone schizoaffective outside of the depression. And like I said I can, unfortunately, name the top ten symptoms of someone schizoaffective off the top of my head.
The above wasn't to make you wrong, SleeperyJim. You wrote another masterpiece, that I'm in awe of. I think this story was very much needed on LW, and if people see themselves in this story it will do them much good, again, especially LW readers. But I think fact checking is important as well, but again doesn't take even one bit from this story for me.