BUZZ-Xchanging: shares slump to 3-yr low on heavy volume as H1 disappoints
** Xchanging (LSE: XCH.L - news) shares down more than a fifth to their lowest since 2012 on concerns over the co's Procurement division and departure of its CEO
** Revenues at the Procurement unit, which accounted for more a third of the co's overall sales last year, fell 18.2 pct
** Co also took a 47 mln GBP goodwill impairment relating to past Procurement outsourcing activity
** Liberium cuts stock to "hold' from "buy" and more than halves its price target on stock
** Stock is by far worst performer on the UK small-cap index (RM (LSE: RM.L - news) : vikram.subhedar.thomsonreuters.com@reuters.net)