The contemporary subprime mortgage crisis is a complex group of vicious circles, both in its genesis and in its manifold outcomes, most notably the late 2000s recession . A specific example is the circle related to housing. As housing prices decline, more homeowners go " underwater ", when the market value of a home drops below the mortgage on it. This provides an incentive to walk away from the home, increasing defaults and foreclosures. This, in turn, lowers housing values further from over-supply, reinforcing the cycle. 
This chart uses the wheel to show the relationship of physical abuse to other forms of abuse. Each part shows a way to control or gain power.