Marketplace lender Social Finance is contemplating a securitization of jumbo mortgages, according to industry officials who claim to have knowledge of the firm’s operations. The news comes amid an interesting time for the jumbo loan market: production volumes are generally strong and likely will be boosted even more by the recent decline in interest rates. But even established nonbank players have been avoiding the securitization route, opting instead to sell newly originated jumbos to commercial banks. SoFi, as the privately held company is known, has been placing...