BUZZ-Aggreko: bottom of FTSE 250 after Berenberg downgrades

** Aggreko (Frankfurt: A1XFZR - news) , world's largest temporary power provider, -7% & top UK midcap faller

** Berenberg cuts stock to "sell" from "hold", TP to 770p from 800p (note dated Sept 29)

** Broker flags stock has re-rated by 12% since mid-August driven by an expected cyclical upswing in the US as the company benefits from the recovery and rebuild effort following the recent hurricanes

** Berenberg sees this re-rating as unjustified & says any cyclical recovery in the group’s North America business will be temporary and offset by disappointment elsewhere

** In particular, broker expects co to miss expectations in its Power Solutions Utility (Utility) division and it expects return on invested capital (ROIC) to continue to disappoint

** Stock second-top faller on Stoxx 600 & fourth most actively traded on index