National Express continues its upward march after rejecting on Friday the improved 450p per share offer from a consortium led by its main shareholder, saying that it undervalued the group and its prospects.Engineering conglomerate Melrose is going well after the broker Panmure Gordon raised its target price on the firm after Friday's first half results.Panmure has also retained its 'buy' recommendation on Eaga, ahead of the green energy support services firm's results tomorrow. The stock is among the top 10 risers in the mid-cap index.FTSE 250 - RisersNational Express Group (NEX) 405.00p +1.66%Halma (HLMA) 199.80p +1.63%Melrose (MRO) 163.20p +1.37%Eaga (EAGA) 130.40p +1.24%Euromoney Institutional Investor (ERM) 272.80p +1.15%Game Group (GMG) 165.70p +1.04%HMV Group (HMV) 118.70p +1.02%Rotork (ROR) 969.50p +0.73%Jardine Lloyd Thompson Group (JLT) 485.20p +0.66%Provident Financial (PFG) 890.50p +0.62%FTSE 250 - FallersMorgan Sindall (MGNS) 653.50p -6.98%Enterprise Inns (ETI) 154.80p -6.80%Melrose Resources (MRS) 318.10p -6.44%Ferrexpo (FXPO) 146.60p -5.97%BTG (BGC) 180.60p -5.74%Peter Hambro Mining (POG) 727.50p -5.70%Taylor Wimpey (TW.) 49.23p -5.69%Fisher (James) & Sons (FSJ) 452.90p -5.65%Salamander Energy (SMDR) 194.90p -5.53%Dunelm (DNLM) 276.00p -5.22%