Companies used to do that before the leveraged-buyout / MBA / private-equity ridiculousness started. I think...Youngstown Tube Co had its own mines, called "ca

Companies used to do that before the leveraged-buyout / MBA / private-equity ridiculousness started. I think...Youngstown Tube Co had its own mines, called "captive mines" dedicated just to making metal for them. That's where captive insurance got its name.