In this economy, failure is an option

"We've gotten to that classic point in a financial crisis where it's gone on for long enough we know there are losses. We just don't know where they are," said Joseph R. Mason, a financial economist at Louisiana State University in Baton Rouge.

"The only way to find out is for investors to push every institution toward failure and see which ones keep operating," Mason said.

About the sunniest assessment that analysts will offer is that if the current crisis holds to historical patterns, it could end as unexpectedly as it began.

"Most panics are like summer storms," said David A. Moss, an economic historian at Harvard University. "They come up abruptly, are erratically intense, then suddenly dissipate."

The cycle started last summer with the near collapse of two Bear Stearns Cos. hedge funds specializing in exotic mortgage-backed securities. What followed was a succession of panics that went so far that even the mainstays of the U.S. mortgage market -- Fannie Mae and Freddie Mac -- had to be propped up by the Federal Reserve.

And a series of other crises are tugging at such disparate threads of the nation's financial fabric as credit cards, student loans, municipal debt and even money market funds.

Last week held true to the storm pattern Moss described. After another round of potentially catastrophic developments in the housing, financial and energy markets, the system pulled to the brink, caught its breath and took a turn for the better.

Oil prices not only halted their upward rush, they fell back a remarkable $16 a barrel in the space of a few days. And after a frenzy of concern about the banking system, markets suddenly calmed when three major institutions -- Citigroup Inc., Wells Fargo & Co. and JPMorgan Chase & Co. -- reported better-than-expected results.

Few economists think the storms are over, though.

"This thing simply hasn't run its course," said veteran banking consultant Bert Ely of Alexandria, Va. "We have a multiple-chapter housing saga that could go on well into the next decade."

And when home values fall, shocks destabilize the financial system and the economy, setting off still more ripples.

Trouble has even been showing up in a seemingly safe and sound corner of the financial world: money market mutual funds. Most people treat such funds as the equivalent of bank savings accounts. Customers, who favor them because they generally pay higher rates than bank accounts, have parked $3 trillion in them -- nearly a quarter of all the money held by the nation's mutual fund industry, according to the Investment Company Institute.

The problem is that money market funds differ from bank accounts in two key ways.

First, they're not covered by the Federal Deposit Insurance Corp. (Money market funds, which are offered by mutual fund companies and are not federally insured, should not be confused with money market accounts, which are offered by banks and are insured.)

Second, a fraction of the money put into money market funds recently has been used on investments that have gone sour. That has forced some companies offering the funds to rush to plug the losses.

Legg Mason Inc. and SunTrust Banks Inc., for example, recently had to pump $1.4 billion each into its money market funds. Bank of America Corp. has injected $600 million.

The culprit in those cases doesn't appear to be housing prices alone so much as the wildly complicated securities that investment firms created out of mortgages and a laundry list of other hard-to-price (and therefore risky) assets such as timber and highways.

The idea behind such financial concoctions was that if each security contained only a small share of each of those items, the overall security would be safer than the individual assets that underpinned them. But it hasn't worked out that way, according to Mason of Louisiana State University.