Industry economists and mortgage lenders widely expect 2018 to look a lot like 2017: slowing production volume, a further shift toward purchase-mortgage lending and more pressure on profits. The average of mortgage origination forecasts from Fannie Mae, Freddie Mac and the Mortgage Bankers Association indicates that production will total $1.688 trillion this year, a 4.8 percent drop from 2017. The refinance sector will take the biggest hit ... [Includes one data chart]