Legacy software specialist Micro Focus is the best performing mid-cap stock by some way after saying its two recent acquisitions, Borland and Compuware, have performed much better than expected and the upping its forecasts for both interim sales and underlying profits. After a "strong close to the first half" the group now expects to report total revenues of approximately $195m, up from $135.6m, while underlying profits will also be above expectations.DSG International, the electrical retailer that owns the Currys and PC World chains, is lifted by a broker upgrade from Citigroup, which now has a 'buy' rating on the stock as it thinks it is well placed to benefit from improved economic conditions. Kesa Electicals, the owner of the Comet chain, is also higher.London-focused property investor Great Portland climbs after it posted an increase in net asset value in the last three months as values in the capital stabilised. Defence and aerospace group Ultra Electronics is the heaviest faller after reporting trading in line with expectations, but adding that it is unlikely to be 'completely insulated from downward pressure on military budgets.'FTSE 250 - RisersMicro Focus International Plc (MCRO) 405.20p +18.48%Northgate (NTG) 238.00p +12.53%DSG International (DSGI) 36.58p +8.13%Great Portland Estates (GPOR) 282.00p +6.62%Investec (INVP) 461.70p +5.08%Petropavlovsk (POG) 1,280.00p +5.00%Daejan Holdings (DJAN) 2,860.00p +4.69%Redrow (RDW) 148.70p +4.50%Kesa Electricals (KESA) 146.20p +4.43%Mondi (MNDI) 345.00p +4.39%FTSE 250 - FallersUltra Electronics Holdings (ULE) 1,302.00p -4.26%Morgan Sindall (MGNS) 581.50p -3.88%Premier Oil (PMO) 1,183.00p -2.47%Stobart Group (STOB) 120.00p -2.44%BTG (BGC) 172.30p -2.32%Go-Ahead Group (GOG) 1,313.00p -2.16%Keller Group (KLR) 683.00p -2.15%WH Smith (SMWH) 506.00p -2.13%St James's Place (STJ) 246.60p -2.03%BBA Aviation (BBA) 151.60p -1.88%