Satellite group Inmarsat was a heavy faller today after negative readacross from a failed rocket launch by one of its partners. ILS, the launch partner for Inmarsat's Global Xpress (GX) airline broadband project, was involved in an explosion of a Proton rocket, the third failure over the last year relating to these launch vehicles. Analysts at Jefferies said that this will likely delay the launch of GX into next year.Mining stocks were performing well today as metals prices edged higher. Hochschild Mining, African Barrick Gold, EVRAZ and Polymetal were among the best performers.Regeneration specialist St Modwen Properties gained strongly after upping its interim dividend by 10% following an 11% increase in pre-tax profit in the first half. The company hailed an "excellent start" to the year and said it is looks forward to a "successful outcome" for 2013 as a whole.Consumer products group PZ Cussons also rose after announcing the acquisition of baby-foods group Rafferty's Garden for £42.2m.Stronger-than-expected guidance for first-half numbers at textile group Berendsen pushed shares higher today, with the stock given an extort boost after Investec lifted its recommendation from 'add' to 'buy'.Online grocery firm Ocado was lower after reporting that it swung to a pre-tax loss of £3.8m in the first half, compared with a profit of £0.2m the year before, as it pumped cash into its growing infrastructure. Underlying earnings however surged by nearly 29%.FTSE 250 - RisersHochschild Mining (HOC) 168.50p +8.01%African Barrick Gold (ABG) 107.90p +7.90%Evraz (EVR) 106.80p +4.71%Workspace Group (WKP) 401.60p +4.31%Polymetal International (POLY) 504.50p +3.98%St. Modwen Properties (SMP) 285.00p +3.64%PZ Cussons (PZC) 366.60p +3.27%Berendsen (BRSN) 789.00p +3.14%IP Group (IPO) 136.00p +3.11%RPS Group (RPS) 213.40p +2.84%FTSE 250 - FallersInmarsat (ISAT) 657.50p -5.40%Spirent Communications (SPT) 135.00p -4.53%Ashmore Group (ASHM) 327.00p -4.05%Imagination Technologies Group (IMG) 282.20p -3.95%Balfour Beatty (BBY) 221.40p -3.74%Britvic (BVIC) 490.80p -3.20%Kazakhmys (KAZ) 271.30p -3.11%BBA Aviation (BBA) 282.10p -3.06%Ocado Group (OCDO) 303.10p -2.91%Inchcape (INCH) 500.00p -2.82%