Trying to understand the spread between conforming and conforming jumbo
It seems that on good MBS days, the spread between conforming and conforming jumbo narrows to about .125% in rate. On bad MBS days, it widens to .25, .375 and worse. Today may have set a record – the spread was .75% at day’s end! I have read that part of what causes the spread is the FNMA MBS pool requirement that a maximum of 10% (or is it 15%?) can be comprised of conforming jumbo loans. But I don’t understand why the spread seems to narrow and widen depending on the day’s trading.
One of the lender’s I work with sent this out:
Citing data from LPS Applied Analytics, a mortgage-data research firm, the Wall Street Journal reports that about 6.9% of prime, jumbo loans were at least 90 days delinquent in December, up from 2.6% in the year earlier period. Delinquencies of non-jumbo prime loans that qualify for government backing increased to 2.1% from 0.8%. Defaults on jumbo mortgages tend to result in outsized losses for lenders given that expensive homes are much more difficult to sell when the real-estate market sours. According to the article, three lenders accounted for nearly half of all jumbo loans made in the first nine months of 2008. The top two originators, Chase and WaMu, made more than 25% of all jumbo loans. In addition, BofA and Wells Fargo each accounted for 11% of the jumbo market.
Do you think that this may have caused the spread to have widened? If so, this will be really bad for high-priced areas such as Southern CA.