The Korx have this new ability you can research right at the start of the game called Cutthroat Competition. The description says that it lowers your interest rates, however the tag on the ability itself says - interest rates +25% - which would seem to be backwards. In addition, the ability does not appear to be working since any ships I purchase before the ability is researched have the same lease payments and interest rates as any ships purchased after the ability is researched.