The dollar sank to an all-time low against the euro and a 12-year low against the yen Thursday as investors worried about the health of the U.S. economy and the effects of the Federal Reserve’s efforts to boost liquidity. The dollar traded as low as 99.8 yen, its lowest level since 1995, while a euro fetched $1.56. The dollar has been sagging for more than five years now, but the decline has accelerated in recent months as the financial sector takes heavy losses on mortgage-related securities gone bad.

There was more dark news on that front Thursday, as Amsterdam-listed Carlyle Capital defaulted on $16.6 billion worth of debt, bringing the highly leveraged mortgage securities investor a step closer to liquidation. The prospect that Carlyle’s lenders will dump its mortgage securities portfolio on the market sent stocks tumbling overseas - shares fell 4.8% in Hong Kong and 3.3% in Tokyo, and were also lower across Europe - and could make for another nasty session Thursday for U.S. lenders such as Fannie Mae (FNM), Freddie Mac (FRE) and Washington Mutual (WM).

Carlyle Group is looking after its own hide. The private equity group issued a statement late Tuesday distancing itself from its Amsterdam-listed mortgage investment fund Carlyle Capital, which has missed margin calls and is in danger of being liquidated by its lenders. Carlyle Group, run by heavy hitters such as David Rubenstein, reminds readers that it and Carlyle Capital are “separate legal and business entities,” in spite of Carlyle Group’s role as investment adviser to the fund. Carlyle Group adds that the $150 million line of credit the private equity group served up to the fund back in August came from Carlyle’s partners, not its investors or investment funds.

Carlyle says it’s doing what it can to help the struggling fund, which has been hit by rising collateral requirements and short-term funding costs on loans from Wall Street banks, but admits that no assurances can be made. “The Carlyle Group is working tirelessly with CCC to assist it in its efforts to maximize value for all interested parties,” Carlyle Group says. On the bright side, “We believe that the challenges facing CCC will have no measurable impact on any other fund sponsored by The Carlyle Group or any of our portfolio companies.”