My airline is profitable to the tune of $100m a month, has an AA credit rating... and is under threat of bankruptcy because $30,000 of bond interest payments didn't get made overnight, because their interest date is very early in the month, when I'm still in the hole from gate leases. (Of course, I took out those two bonds early in the game, before I'd figured out the consequences.)
It would be really nice if we could (for a fee, of course) refinance or modify the terms of bonds, as they would in the real world.
