[legutierr]

Very interesting. I didn't realize.

Can just any transaction be rolled back, or are there restrictions? Do both parties need to agree to the rollback, or can a rollback be involuntarily imposed on one party by another party?

I imagine there are some circumstances where after a disadvantageous trade one party might claim to have fat-fingered the order, just to try to avoid the repercussions of a mistake that was made with full consent and awareness. I imagine there are cases where if a counter-party were to agree to a such a reversal, it would represent a loss for that counter-party.

How often are trades like this reversed, where one party clearly benefits from the reversal at the expense of the other party, and where the other party would not agree to the reversal if it were in their power to do so? How are these situations arbitrated, if only one of the two parties wants to reverse the trade, and the other party objects?