Buried in the fine print of the $25 billion nationwide servicing settlement is a small incentive for the five banks if they agree to waive their right to seek deficiency judgments against distressed borrowers. The five servicers agreed to make some $17 billion in loan modifications and refinances, but they meet those obligations by racking up “credits” for a long list of actions. For every dollar of principal reduction made on a portfolio mortgage with a loan-to-value ratio under 175 percent, for example, they get a dollar of credit toward their obligation. The agreement gives them credit for...