Loan Modification

Billions were poured into so-called "mortgage opportunity funds," which planned to pick through the wreckage of the once-high-flying housing market. Some investors aimed to focus on mortgage-backed securities, hoping to buy in at pennies on the dollar so just a few bond payments would reap sizable returns. Others, however, delved into the realm of whole loans, buying troubled mortgages from floundering banks.

As noted in the Wall Street Journal this morning, an investment strategy that seemed like a slam dunk on paper -- buying distressed mortgages on the cheap, and working out equitable arrangements with borrowers -- has proven extremely difficult to execute.