The World's Largest Asset Class

At $26 trillion America’s housing stock is the largest asset class in the world, worth a little more than the country’s stockmarket. America’s mortgage-finance system, with $11 trillion of debt, is probably the biggest concentration of financial risk to be found anywhere. It is still closely linked to the global financial system, with $1 trillion of mortgage debt owned abroad.

The supply of mortgages in America has an air of distinctly socialist command-and-control about it. Some 65-80% of all new home loans are repackaged by organs of the state. The structure of these loans, their volume and the risks they entail are controlled not by markets but by administrative fiat.No one is keen to make transparent the subsidies and dangers involved, the risks of which are in effect borne by taxpayers. But an analysis by The Economist suggests that the subsidy for housing debt is running at about $150 billion a year, or roughly 1% of GDP.

The mortgage machine is a largely off-balance-sheet way to funnel money to ordinary Americans, most of whom still want to own homes. Just as underwriting standards in the private sector gradually loosened over time before 2007, there are gentle signs of loosening evident today, too—rules on down-payments, for example, have been relaxed.

This is from "Comradely capitalism: How America accidentally nationalised its mortgage market," The Economist, August 20, 2016:

"First, banks have partially withdrawn from the mortgage game after facing swathes of new rules and $110 billion of fines for misconduct. They still own mortgage-backed bonds and they still make home loans to wealthy folk, which they keep on their balance-sheets. But with the exception of Wells Fargo they are less keen on writing riskier loans in their branches and feeding them to securitisers. New, independent firms like Quicken Loans and Freedom Mortgage have filled the gap. They originate roughly half of all new mortgages. The second big change is that the government's improvised rescue of the system in 2008-12 has left it with a much bigger role (see chart 3). It is the majority shareholder in Freddie Mac and Fannie Mae, mortgage companies that were previously privately run (though with an implicit guarantee). They are now in "conservatorship", a type of notionally temporary nationalisation that shows few signs of ending. Other private securitisers have withdrawn or gone bust. This means that the securitisation of loans, most of which used to be in the private sector, is now almost entirely state-run. Along with Fannie and Freddie, the other main players are the Veterans Affairs department (VA), the Federal Housing Administration (FHA) and Ginnie Mae, which helps the FHA and VA package loans into bonds and sell them."