Over the past two years, roughly a dozen investment vehicles have raised at least $500 million each to buy mortgage servicing rights, fueling a red-hot market that for now shows no sign of slowing. Some of these “funds” are headed by mortgage banking veterans such as Emanuel Friedman – the former co-CEO of Friedman, Billings, Ramsey Group – and Michael Lau, a former top deal maker at Phoenix Capital, one of the largest servicing brokerage firms in the nation. According to interviews conducted by Inside Mortgage Finance, Lau’s company, Pingora Loan Servicing, has amassed...