* Q4 adj. loss $0.41/shr: Thomson Reuters I/B/E/S
* Q4 est. loss $0.19/shr: Thomson Reuters I/B/E/S
* Total expenses rise 59 pct
* AUM falls 26 pct
* Shares fall nearly 10 pct
March 2 (Reuters) - Cowen Group Inc (COWN.O), the investment bank taken over by hedge fund Ramius LLC in November, posted a wider-than-expected quarterly loss, hurt by rise in expenses and lower assets under management, sending its shares down 10 percent.
Assets under management fell 26 percent to $7.85 billion on Jan. 1, 2010, from $10.57 billion at Dec. 31, 2008.
For the fourth quarter, net loss attributable to shareholders was $23.4 million, or 46 cents a share, compared with a loss of $76.3 million, or $2.03 a share, a year ago.
Total revenue rose to $60.4 million, from $27.3 million a year ago.
The company posted an adjusted loss of 41 cents a share while analysts on average had expected a loss of 19 cents a share, on revenue of $64.50 million, according to Thomson Reuters I/B/E/S.
Total expenses rose 59 percent to $81.7 million. Employee compensation and benefits more than doubled to $45.7 million.
Shares of the company were trading down 7 percent at $5.10 in morning trade Tuesday. They touched a low of $4.97 earlier in the session. (Reporting by Jochelle Mendonca in Bangalore; Editing by Unnikrishnan Nair)