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Why the federal government has expanded exposure to risky mortgages

Recent upbeat data shows the housing market is stabilizing. But behind the positive trend lies an alarming reality: right now there is more government-backed housing debt than at any other point in U.S. History and taxpayers are on the hook for most of the risk. Adrian Helfert, Westwood Director of Multi-asset Portfolios, joined Yahoo Finance's On The Move to discuss.