The Treasury has long been the benchmark for tracking mortgage rate movement, i.e. 30 year fixed vs. 10 year Treasury. Based on the market over the last couple of months, that has not happened. The folloing graph will give you perspective on why the models are not following the traditional pattern.
30Y CONF FIXED vs. 10Y TREASURY

Why are mortgages widening or losing value vs. other benchmarks like treasuries?
1. Lack of buyers. Dealers' balance sheets are full and market volatility.
2. Banks more concerned with capital retention to cover potential losses. Defensive posture following write-downs totaling > $120 billion.
3. Asia absent - lack of strength in the market.
4. Money Managers & Hedge Funds - momentum trading.
5. Originators and Servicers have been selling.
6. Investment Firms - margin calls have forced liquidation.
7. Flight to Quality
We have more sellers than buyers. The selling bias puts pressure on mortgages, forcing mortgage prices lower and wider. The usual buyers of mortgages aren't buying or are buying other investments at cheaper prices
Historical View of Volatility
Credit and liquidity concerns stemming from the sub-prime fall-out that has also flowed through to the prime-A market has caused the correlation between the 10Y Treasury and mortgage yields to break down.


You can find AJ Nisen on Active Rain at Contra Costa California Mortgages. Call AJ to talk about Mortgage Rates, Free Credit Report or visit AJ's website to use his mortgage calculator.
Alan 'AJ' Nisen
Mortgage Loan Officer
Email: aj.nisen@bankofamerica.com
http://mortgage.bankofamerica.com/ajnisen
http://www.activerain.com/ajn
Alan, this is great...it's hard for us REALTORS to truly study the current mortgage market and this is very helpful!