With refinance volume falling and minimum net-worth requirements heading north, advisors in the mergers-and-acquisitions market say undercapitalized firms should sell now, while they still can. Larry Charbonneau, a principal of Charbonneau & Associates of Texas, said he is currently working on four deals but noted that, “There a lot of shops out there with less than $5 million in capital that need to do something but haven’t realized it yet.” Although Fannie Mae and Freddie Mac have net-worth minimums in the $3 million range, there is...