BUZZ-Regus: RBC upgrades after sell-off
** Office space supplier Regus (Stuttgart: RGV.SG - news) +3.9%, among top FTSE 250 gainers in decent volume
** RBC Capital Markets - rated at 5 stars for recommendation accuracy on Regus (Other OTC: RGSJY - news) , per StarMine - upgrades stock to "outperform" v "sector perform"
** Cites co's unrivaled market position, significant expansion potential and strong structural growth drivers
** Stock -6% from end-March peak until Tues close (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)