Defying expectations for the start of 2016, mortgage rates spiraled down further last week, spurring more volume in the mortgage market. Total applications increased 8.8 percent on a seasonally adjusted basis last week from the previous week, according to the Mortgage Bankers Association.

Refinance applications were behind much of the surge, rising 11 percent from the previous week, seasonally adjusted. The results include an adjustment for the Martin Luther King Jr. holiday.