Home mortgage applications increased dramatically last week, as a strong sell-off in the U.S. stock market pushed interest rates lower briefly.

Jumbo loan borrowers were especially enticed by the potential savings. An index of application volume jumped 11.3 percent on a seasonally adjusted basis for the week ending August 28th versus the previous week, according to the Mortgage Bankers Association (MBA). Volume is now up 30 percent from a year ago.