A rise in interest rates on mortgages will help First Republic Bank, San Francisco, gain market share in jumbo originations, according to officials at the bank. Through the first six months of 2018, First Republic ranked fourth among non-agency jumbo lenders, accounting for 3.8 percent of the estimated $140.0 billion of jumbo originations, according to Inside Nonconforming Markets. James Herbert, chairman and CEO of First Republic, noted that some jumbo lenders are reducing staff as originations decline ...