INTERVIEW-UPDATE 1-Commerzbank saw business improving in Q2

* Business segments mixed, improvement in corporates, retail

* Structured credit products still volatile

* Bank has no need for more government help or bad bank plan

* Shares widen gains, up 2.5 percent, outpace sector

(Adds detail, background, shares)

By Patricia Uhlig

BERLIN, July 10 (Reuters) - Commerzbank (CBKG.DE) saw losses narrow in the second quarter versus the first as business with medium-sized companies and retail clients achieved good results, a Commerzbank board member told Reuters in an interview.

"The trend in the second quarter was better than in the first," said Markus Beumer, responsible for Commerzbank's business with the small and medium-sized "Mittelstand" companies that form the backbone of the German economy.