FOMO and Loss Aversion are different, FOMO is clearly the Fear Of Missing Out, Loss Aversion is simply the fear of losing if you did not act immediately.
You can have a *fear of missing out* for not taking profits when others where selling (and you want to sell too) but instead you decide to hold through but regrets later when the market starts correcting but the more popular term for that is FUD.
No, please, it doesn't work that way. If you look at it from the "Fear Of Missing Out" in the English way, you will miss it. I missed it myself until I saw it when I was learning about similar term that dragged me into reading more about it to understanding. It is in Economics as a subject we read daily and apply to various aspect of living and decision making, no second meaning can be attributed to it, it is the standard. What you described is purely Loss Aversion (LA), not minding if you regret the decision later or not. A big confusion is that they are interrelated, we have a few of them, including FUD too, they are all connected. Once you know the distinction, the confusion is gone, Loss Aversion mostly tells of the psychology that caused the FOMO.
