Social and Behavioral Sciences Commons^™

Using Monte Carlo Simulations To Establish A New House Price Stress Test, James R. Follain, Seth H. Giertz

Department of Economics: Faculty Publications

The focus of this paper is on the house price stress test (termed ALMO) that was designed to assess the fiscal strength of Fannie Mae and Freddie Mac and, if necessary, to trigger remedial action in order to avert a crisis. We assess whether the ALMO stress test was an adequate representation of an extremely weak housing market, given the best available information leading up to the Great Recession. A Monte Carlo simulation model is developed to estimate the severity of low probability events (i.e., severe house price declines). We illustrate the complexity and subjective nature of the process used …