Bear Stearns Friday revealed it will tap JPMorgan Chase & Co. for a four-week secured loan facility to boost the company's liquidity. JPMorgan will make the loan in conjunction with the New York Federal Reserve.

Throughout this week, investors have been concerned about the investment bank's possible explosure to collapsing fund Carlyle Capital and other at-risk investment funds. Carlyle Capital, an arm of private equity firm Carlyle Group, invested heavily in poor-quality mortgage assets and has had to default on $16.6 billion in debt.

The market was concerned that Bear could end up seizing low-quality mortgage-backed securities as collateral from Carlyle. That likely would have left Bear unable to sell those assets. Bear Stearns already had taken significant writedowns on its own mortgage-related holdings.