Susan Wachter posted Credit Risk Transfer, Informed Markets, and Securitization to SSRN. It opens,
Across countries and over time, credit expansions have led to episodes of real estate booms and busts. Ten years ago, the Global Financial Crisis (GFC), the most recent of these, began with the Panic of 2007. The pricing of MBS had given no indication of rising credit risk. Nor had market indicators such as early payment default or delinquency – higher house prices censored the growing underlying credit risk. Myopic lenders, who believed that house prices would continue to increase, underpriced credit risk.
In the aftermath of the crisis, under the Dodd Frank Act, Congress put into place a new financial regulatory architecture with increased capital requirements and stress tests to limit the banking sector’s role in the amplification of real estate price bubbles. There remains, however, a major piece of unfinished business: the reform of the US housing finance system whose failure was central to the GFC. Fannie Mae and Freddie Mac, the government-sponsored enterprises (GSEs), put into conservatorship under the Housing and Economic Recovery Act (HERA) of 2008, await a mandate for a new securitization structure. The future state of the housing finance system in the US is still not resolved.
Currently, US taxpayers back almost all securitized mortgages through the GSEs and Ginnie Mae. While pre-crisis, private label securitization (PLS) had provided a significant share of funding for mortgages, since 2007, PLS has withdrawn from the market.
The appropriate pricing of mortgage backed securities can discourage lending if risk rises, and, potentially, can limit housing bubbles that are enabled by excess credit. Securitization markets, including the over the counter market for residential mortgage backed securities (RMBS) and the ABX securitization index, failed to do this in the housing bubble years 2003-2007.
GSEs have recently developed Credit Risk Transfers (CRTs) to trade and price credit risk. The objective is to bring private market discipline to bear on risk taking in securitized lending. For the CRT market to accomplish this, it must avoid the failures of financial assets to price risk. Are prerequisites for this in place? (2, references omitted)
Wachter partially answers this question in her conclusion:
CRT markets, if appropriately structured, can signal a heightened likelihood of systemic risk. Capital markets failed to do this in the run-up to the financial crisis, due to misaligned incentives and shrouded information. With sufficiently informed and appropriately structured markets, CRTs can provide market based discovery of the pricing of risk, and, with appropriate regulatory and guarantor response, can advance the stability of mortgage finance markets. (10)
Credit risk transfer has not yet been tested by a serious financial crisis. Wachter is right to bring a spotlight on it now, before events in the mortgage market overtake us.