BUZZ-Tesco: up at 2.5-wk highs as Clubcard interest intensifies-media
** Tesco (Xetra: 852647 - news) hits 2.5-wk highs following weekend press reports that a bidding war could be in store for Dunnhumby, the customer data specialist behind its Clubcard loyalty scheme
** Consumer research giant Nielsen is poised to enter the 2 bln pound auction for Dunnhumby, the Sunday Times reported
** Race for Dunnhumby includes advertising group WPP (LSE: WPP.L - news)
** Dunnhumby put up for sale as part of a drive by Tesco's new boss Dave Lewis to slash costs & sell assets to mend the group's finances (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)