Zero Savings Rate

If there is a housing bubble (don't know) and it bursts (may or may not), then we've got problems.

NEW YORK (CNN/Money) - The savings of U.S. consumers are:

a) at the lowest rate since the Depression.

b) at peaks not seen even during the stock market boom of the late 1990s.

c) all of the above.

If you're wondering how "all of the above" could be the correct answer -- and it is -- walk outside your front door and look around.

Even as a government report Tuesday showed the national savings rate at zero -- that's right nada -- the rise in the value of homes has given the average U.S. household a net worth of greater than $400,000, according to a separate report from the Federal Reserve.

Household real estate assets have risen by just over two-thirds since 1999, and the run up has enabled consumers to spend more money than they are bringing home in their paychecks. They're viewing their homes almost like ATM machines, using home equity loans and refinancings to pull out cash and support a higher level of spending.

"[Rising home values] are making people feel they don't need to save," said Lakshman Achuthan, managing director of the Economic Cycle Research Institute.

That means they are spending more of their paychecks than they would otherwise. That's good news for the current economy but it could cause trouble longer term, according to some economists.