According to the San Francisco Chronicle, rates on the new conforming loan limits are up in the air. Basis Point writer Julian Hebron was quoted in the article.

My alert to lock last week proved effective, as extreme volatility continues. Fixed and ARM rates opened this week .375% to .5% higher than last week. Last Wednesday, mortgage bond yields (that lenders use for rate pricing) were at 2-year lows, and today bond yields (and ARM but not fixed rates) are at the highest [...]

Today, the San Francisco Chronicle reported on Jumbo mortgage improvement. Basis Point writer Julian Hebron was quoted in the story.