BUZZ-Moneysupermarket, Zoopla: take a bruising amid Ofgem investigation

** Price comparison site Moneysupermarket.com & Zoopla heftiest fallers on FTSE 250 in decent volume

** CMA in throes of investigation into UK energy market at large, including looking into price comparison websites

** Ofgem has asked MONY for information linked to its investigation into whether 2 or more cos providing a supporting service for the energy industry have breached competition law

** No further information was provided

** uSwitch, a provider of comparisons of gas & electricity suppliers & which was recently bought by Zoopla, got similar request from Ofgem earlier this yr

** MONY, down c.9 pct, poised for biggest one-day drop since early March (traded close to a record set early May on Wednesday), while Zoopla suffers worst day in short period as listed co, down c.7 pct (hit all-time high Weds)

** Trading volume in MONY twice its 90-day daily avg, while that for Zoopla at three quarters (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)