Can you figure out how to make money here?

Zillow estimates home values, and then compiled a list of the ten cities with the most mortgages underwater, i.e. whose housing values are less than the debt owed on the house.

1. 80% of Las Vegas mortgages are underwater
2. 64% of Reno mortgages are underwater
3. 64% of Orlando mortgages are underwater
4. 57% of Stockton mortgages are underwater

It occurred to me that these underwater mortgages keep homeowners from moving to different cities and accepting new jobs because they don't have enough money to sell their homes.  This represents an inefficiency in that homeowners are stuck in less attractive jobs (lower valued uses).  

But as we emphasize in Chapter 2, inefficiency also implies opportunity.  If you can figure out a way to move these assets to higher valued uses you can make some money.