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Monthly Archive for December, 2009

MORTGAGE DEFAULT RATES

December 16, 2009mortgageComments Off

The historic default rates on mortgages have been generally much lower than on other consumer and corporate loans. They have also generally remained low even when borrowers have significant levels of negative equity. There are a number of reasons why this should be the case:
People have to live somewhere. Negative equity represents an unrealized loss. There is no incentive to realize this loss provided the borrower can service the loan. The advantage of moving to cheaper rented accommodation has to be balanced against the disadvantages of defaulting. Bankruptcy avoidance. If a borrower defaults on a property with significant levels of negative equity they are likely to face bankruptcy proceedings. In addition to the stress and loss of assets that such proceedings bring they are also likely to make it impossible for the borrower to ever own their own property.
Long dated option. A mortgage can be viewed as a long dated option. Given long enough most property markets eventually recover, even though it may take years. Option holders do not simply throw away an option that is out-of-the-money for the simple reason that it also has a “time value”. Given the typical term of mortgages the time value is significant, particularly as the “premium” they have paid (the down payment) represents a significant portion of their accumulated savings.
The level of defaults in the UK rose sharply after the residential property market crashed in 1986. A close examination of the problem showed that many defaulters had not actually made any down payment on their mortgage. Instead the lending bank had sold indemnity policies to them issued by an insurance company. These policies protected the banks from the first 20% of losses. Having paid very little for the option and being well out-of-the-money borrowers had little incentive to stay current and simply dropped off the keys after moving out.
The actual losses experienced by banks were relatively modest and the insurance companies simply responded by increasing the premiums charged for these policies. Few banks went through formal bankruptcy proceedings and, in the absence of a central register of defaulters, borrowers were able to go to another bank and took out a new mortgage on a different property. It’s a wonderful world.

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Historic Mortgage Drawdown

December 11, 2009Mortgage DrawdownComments Off

We need to estimate the level of new mortgages drawn down over time. If residential mortgages were rising very rapidly (and this is usually the case when real estate bubbles develop) a reasonable first approximation is to take the net increase in mortgage loans and assume that it is close to the gross increase. This may be done at the system level or for individual banks. Some countries actually publish gross drawdowns and these should be used when available.
Next we estimate how much of these loans have been repaid. Based on our example of a 20-year mortgage we know approximately how much capital is repaid in each year.
We are only interested in the loans made in 1995, 1996 and 1997. These are the only loans that are at risk of being “under water”. A mortgage taken out in 1995 is approximately six years old and hence approximately 17% of the original principal has been repaid. This could be done on a quarter by quarter basis but besides from adding complexity and increasing the risk of computational error it does little to increase the accuracy of the estimates.
We then calculate the estimated balance outstanding and subtract it from the current estimated value of the properties bought. This shows that the only properties at risk were those bought between 1Q96 and 4Q96.
Finally, we can make a reasonable first-cut estimate of the level of negative equity. Approximately 12% of mortgage loans, by value, have negative equity with the level of negative equity highest for people who bought in 3Q96 at approximately 30% of their outstanding balance.
Part of the reason for including this example is to illustrate how in an imperfect world, where the data to arrive at a definitive answer either does not exist or is not reported, it is still possible with many problems to make some reasonable quantified conclusions using the data that is available, some clear approximations and a bit of creativity.
This method of estimating the level of mortgages with negative equity will not work in markets with significant levels of mortgage securitization.

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