Isn't the focus on the 30-year fixed rate mortgage at least a little bit narrow in analyzing what happened during last decade's financial crisis? There were al

Isn't the focus on the 30-year fixed rate mortgage at least a little bit narrow in analyzing what happened during last decade's financial crisis? There were all kinds of negative amortization and adjustable interest loans being pushed, and I recall reading that high-leverage mortgages, not sub-prime, were where the defaults were greatest. My idea is that local governments should play a role in regulating mortgages because defaults, foreclosures, and abandoned property have serious consequences for neighborhoods and municipalities. Counties should have and exercise a right to refuse to register liens attributable to pathological lending likely to cause local economic hardship.