[qeternity]

Yeah this is trading 101 for anyone who has cut their teeth somewhere decent. I had that drilled into my head.

There is no such thing as house money.

[concreteblock]

Curious, who drilled it into your head? Were you/are you a quant?

I see the 'house money' fallacy all the time (most commonly in the context of 'take out your initial investment').