BusinessWeek reports that The Bear Stearns Companies (NYSE: BSC), which reported earnings today, is behind $10 billion worth of Collateralized Debt Obligations (CDOs) at Citigroup Inc. (NYSE: C) and Bank of America (NYSE: BAC). It all comes down to yet another new word to add to your financial vocabulary -- Klio Funding -- a brand of CDO that enabled Bear to sell to the $2 trillion money market fund industry.

What is Klio Funding and how did it cause all this damage? Klio Funding is "an entity" that sells Commercial Paper (CP) -- short-term loans -- and uses it to buy higher-yielding long term investments. Since Citigroup had agreed to refund investors' initial stakes plus interest -- through liquidity puts -- money market funds that bought Klios thought they would get higher yields at low risk.

Meanwhile, Ralph Cioffi -- who headed up three Bear hedge funds which eventually folded -- used money raised from the Klios to buy CDOs and to lock in year-long financing for his hedge funds. This is significant because hedge funds typically can only borrow money for weeks at a time due to their risk. Cioffi's CDOs were popular, raising $100 billion.