While creating a headache for most, the recent volatility in stock markets has helped spread-betting firm IG Group achieve record levels of client activity in its first quarter, giving a generous boost to its share price. Despite it being holiday season in the majority of the group's markets, IG expects revenues to exceed £94m in the three months ending 31 August, up from £79.1m in the first quarter of last year. Amlin saw its share price tumble after reporting that it had swung to a deep loss in the six months ended 30 June, as a result of what the FTSE 250 insurance and reinsurance underwriter called "unprecedented first half catastrophe loss activity". The firm reported a pre-tax loss of £192.3m in the period, down from a profit of £107.6m in the same period the year before. Loss per share was 30.7p, compared with earnings of 17.1p per share previously. Micro Focus International was heading in the same direction after the acquisitive legacy software firm that suddenly found itself in the sights of predators, said it is no longer involved in bid talks. FTSE 250 - RisersFerrexpo (FXPO) 330.10p +6.55%Kenmare Resources (KMR) 40.23p +5.87%Petropavlovsk (POG) 775.50p +5.73%Afren (AFR) 103.70p +5.60%Lamprell (LAM) 290.90p +5.55%Misys (MSY) 262.20p +5.30%Centamin Egypt Ltd. (CEY) 111.10p +5.21%RPS Group (RPS) 199.40p +4.95%IG Group Holdings (IGG) 412.90p +4.90%Genus (GNS) 906.00p +4.74%FTSE 250 - FallersGem Diamonds Ltd. (DI) (GEMD) 185.00p -5.37%Micro Focus International Plc (MCRO) 251.60p -4.33%WH Smith (SMWH) 462.60p -2.55%Bwin.party Digital Entertainment (BPTY) 100.10p -2.53%Amlin (AML) 316.60p -1.92%Kesa Electricals (KESA) 100.90p -1.66%St. Modwen Properties (SMP) 136.90p -1.51%Charter International (CHTR) 627.00p -1.49%JPMorgan Russian Securities (JRS) 503.50p -1.47%Salamander Energy (SMDR) 220.20p -1.43%NR