JV's aren't about increasing the value of our buy-in investment. So if we paid 2 billion for our stake in LATAM, from a profit sharing perspective it's irrelevant that the value of LATAM goes up or down. JV's produce revenue ostensibly by growing passenger numbers due to the increased size of our joint Delta/Partner network. So someone in Mexico can travel partly on AeroMexico and partly on Delta and the companies split the revenue. I would also assume for the airlines that we have ownership stakes in that there would be some profits reaped if the partner airline as a whole makes money, but I'm not up on the complexities of those agreements.

There are and have been writeoffs/writedowns of previous investments but I don't think those have an effect on the profit sharing formula.