If overnight interest rates do not fall as a result of the Fed's guarantee for commercial paper and related efforts to create incentives for banks to lend, the leaders of world's central banks and treasury departments may have to try a more creative approach to end the financial crisis: a global distressed asset summit.

As economist David H. Wang told BloggingStocks Wednesday, the major economies may have to hold a global 'out & price' summit to get distressed and bad assets -- the source of so many of the defaults and resultant fear among banks -- out of the financial system.

The problem, Wang said, is not just that the subprime and Alt-A mortgage backed securities represent distressed and bad debt, it's that "banks and other financial institutions can't determine the value or price of many of these securities."

Unknowns about toxic assets driving fear

Wang believes that "lack of certainty about price is the biggest factor in banks' unwillingness to lend."

"Banks can't determine the price of these assets, it represents a big uncertainty, therefore because they're uncertain regarding what their competitor banks hold, they aren't lending, and they're charging higher rates for short-term loans," Wang said. "Both are restricting commerce and will continue to slow economies all over the world if the problem is not addressed."