Anite shares plunged after the Investec said the company would need a strong fourth quarter to meet its full year forecasts, and downgraded its rating on the stock from 'buy' to 'hold. Ophir shares tanked after hitting technical resistance in the form of their primary downtrend line.Meanwhile, Raven Russia rose after unveiling its financial results for the year ended December 31st, which revealed that underlying operating profit rose 63% to $112.1m, underpinned by profitable acquisitions. The Russia-focused property investment company reported that net rental and related income for the year increased by 49% to $136.5m.Betting group Ladbrokes has unveiled plans to extend its relationship with Playtech, the online gaming software company, as part of the former's 're-invigoration' of its Digital business, pushing shares in both groups higher. Daniel Stewart & Company said the deal could mark a change in fortunes for Ladbrokes. Regus rose after JP Morgan upped its target price from 122p to 135p, while downgrading the stock to neutral. FTSE 250 - RisersRaven Russia Ltd (RUS) 71.00p +8.65%Ladbrokes (LAD) 240.70p +6.88%Regus (RGU) 157.40p +4.79%Dignity (DTY) 1,425.00p +4.32%WH Smith (SMWH) 734.50p +4.18%TalkTalk Telecom Group (TALK) 267.40p +3.56%Playtech Ltd. (PTEC) 570.00p +3.35%Computacenter (CCC) 500.00p +2.75%Ocado Group (OCDO) 138.10p +2.68%Hikma Pharmaceuticals (HIK) 963.00p +2.45%FTSE 250 - FallersAnite (AIE) 129.90p -16.19%Ophir Energy (OPHR) 448.70p -14.04%Homeserve (HSV) 231.80p -5.00%ICAP (IAP) 328.70p -4.06%Alent (ALNT) 375.60p -3.94%International Personal Finance (IPF) 465.70p -3.88%RPS Group (RPS) 248.10p -3.84%Kenmare Resources (KMR) 31.34p -3.36%Tullett Prebon (TLPR) 266.20p -3.27%Ferrexpo (FXPO) 212.90p -3.10%NR