The other day I was pondering when is it +EV to FOLD AA preflop. I can think of at least one situation, off the top of my head and am wondering if anyone can show some math which will allow me to figure out other situations, if others exist.

When I said +EV to fold, obviously you can't win money by folding, so I guess it's better to rephrase that by saying "When is folding AA pre the least of 3 evils?" IOW, when calling or raising is -EV, folding is the best option.

I am asking because the idea seems counterintuitive and I haven't seen it mentioned anywhere online or in print.

Assuming someone can show the math, has anyone actually ever folded AA preflop?