Winners and Losers: CB Richard Ellis

Shares of CB Richard Ellis(CBG Quote) soared more than 50% Wednesday after the commercial real estate firm announced a renegotiated credit agreement and was upgraded by JPMorgan.

The stock was up 50.7%, or $1.52 to $4.52, on volume of almost 11.5 million shares and as high as $4.95 intraday. The normal volume for the Los Angeles-based company is about 6.3 million shares.

The company said the new credit agreement will give it greater flexibility "to navigate through a weaker market environment." The pact allows the company to carry a greater amount of debt relative to its available cash, and makes other modifications to covenants in its credit agreement. ...