I know several couples right now who would break up in a minute if they had any equity left:

Chalk up another victim for the crashing real estate market: the easy divorce.

With nearly one in six homes worth less than the mortgage owed on it, according to Moody’s Economy.com, divorce lawyers and financial advisers around the country say the logistics of divorce have been turned around. “We used to fight about who gets to keep the house,” said Gary Nickelson, president of the American Academy of Matrimonial Lawyers. “Now we fight about who gets stuck with the dead cow.”

As a result, divorce has become more complicated and often more expensive, with lower prospects for money on the other side. Some divorce lawyers say that business has slowed or that clients are deciding to stay together because there are no assets left to help them start over.

“There’s an old joke,” said Randall M. Kessler, Ms. Needle’s lawyer. “Why is a divorce so expensive? Because it’s worth it. Now it better really be worth it.”

In a normal economy, couples typically build equity in their homes, then divide that equity in a divorce, either after selling the house or with one partner buying out the other’s share. But after the recent boom-and-bust cycle, more couples own houses that neither spouse can afford to maintain, and that they cannot sell for what they owe. For couples already under stress, the family home has become a toxic asset.