If you own a portfolio of nontraditional mortgage loans, HanoverTrade Inc. has a profitability tip you might want to consider. “The current market for nonprime and subperforming loans is very strong and it is a great opportunity for customers to sell some of their nonperforming loans,” said John Burchett, chief executive officer of Hanover Capital Mortgage Holdings, HanoverTrade’s parent company. “These loans may cause their holders problems later on. We can sell them at…