A few weeks back, Flagstar Bank sold roughly $12 billion in mortgage servicing rights in a private transaction for an undisclosed sum. To date, the sale has not been disclosed but that isn’t stopping players in the MSR market from talking about the transaction as well as rumors that Flagstar, at one time, was contemplating selling upwards of $70 billion of MSR. A source close to the deal said that Flagstar was definitely contemplating a large MSR transaction late last year “but tabled it.” A spokeswoman for the bank declined to comment. If Flagstar had unloaded...