The amount of jumbo mortgages handled by a large group of servicers increased in the first quarter, according to a new ranking by Inside Nonconforming Markets. The 30 servicers handled an estimated total of $1.05 trillion in jumbos as of the end of March, up 1.4 percent from the end of 2017 and a 13.5 percent increase from March 2017. Growth in jumbo servicing significantly outpaced trends in total mortgage debt outstanding. Some $10.65 trillion ... [Includes one data chart]