Mortgage fintech Blend is on a roll; Blend’s customer base now accounts for more than 25% of the $2.1 trillion U.S. mortgage market by origination volume; in 2019, Blend processed a total of $538 billion in loans, more than double the $211 billion it processed in 2018; in a conversation with HousingWire, Blend’s CEO Nima Ghamsari said that the current boom in mortgage refinancing should last a while as there is $4.5 trillion worth of loans that should be refinanced given the current rate environment; the pandemic has forced quicker digital adoption at banks and Blend’s digital closing tools were rolled out two months ago, six months ahead of schedule. HousingWire.