i didn't peruse ten pages of responses, so I don't know if this has been said, but here a few unorthodox ideas.
first, when you "cut losses" in a relationship, it isn't by dissing the other person. You can cut a loss by ending an argument by giving in (if it's not a huge non-negotiable), etc. The point is neither people nor relationships are commodities. You may buy and sell 'em when you're young and careless, but that's just plain wrong and actually stupid.
the next thing is something I learned from one of my mentors. this guy would have enormous equitiy swings -- 6 figures per day sometimes, 5 routinely. He never, ever told his wife. He insulated her from the ups and downs. that's what a man should do.