It is possible to repay a negative loan, I dont get how it got negative, but I could repay it, negatively, so my money got positive.
Before
After
The money bug on repairing stands and runways with a negative wallet is still there too.
Bug report submitted
Negative loan 
.
Technical you lend other money in this case and should get paid with interests. 
This is negative interest rate working its magic.
Well did you loan money to this bank? By the looks if it, they have taken out a loan with you which is a nice feature we included as a way to make extra money if you pocket is flooded.
Lol jk, fun math bug… 
