The only ration lending policy -- on an individual level -- is to discount any systemic risk you create by 100% minus how much of the system you make up. If ev

The only ration lending policy -- on an individual level -- is to discount any systemic risk you create by 100% minus how much of the system you make up. If everyone else does this, systemic risk is ballooned and it doesn't matter if you do it or not, you are still going to fail. If no one does this, it is imperative to you do it--after all, someone else is eating ~90% of the costs and you are getting the benefits.