Most updates from the mid-cap index have been poorly received.Imperial Leather soap maker PZ Cussons slips back even though it notched up a better than expected 16% rise in annual pre-tax profit and looks ahead with cautious optimism.Chemical firm Croda spills into the red after it revealed a 14% drop in interim profit after making a loss at its industrial specialties division but said it is confident of making overall good progress for the rest of the year.ARM falls back after tough times in the semiconductor business sent both revenue and profits tumbling at the chip designer over the past three months, though it increased the interim dividend by 10%.National Express gives up the gains it notched up yesterday when fellow bus and rail group StageCoach confirmed it is in discussions with a consortium over acquiring some of its assets.On the plus side, South Africa-based bank Investec is higher after saying it is to raise up to £90m through a placing of 22m new shares to fund the repurchase of existing debt at a discount to par.FTSE 250 - RisersStobart Group (STOB) 103.50p +4.02%Daejan Holdings (DJAN) 2,193.00p +3.49%Edinburgh UK Tracker Trust (EUK) 207.00p +2.73%Fidessa (FDSA) 1,277.00p +2.65%PayPoint (PAY) 532.50p +2.40%Punch Taverns (PUB) 97.75p +2.36%Investec (INVP) 417.50p +2.33%Regus (RGU) 71.00p +2.16%JPMorgan Emerging Markets Inv Trust (JMG) 404.75p +1.95%Domino Printing (DNO) 235.00p +1.95%FTSE 250 - FallersYell Group (YELL) 30.50p -6.87%ARM Holdings (ARM) 126.25p -4.54%PZ Cussons (PZC) 224.50p -4.47%Game Group (GMG) 144.50p -4.30%Provident Financial (PFG) 818.50p -4.27%Croda International (CRDA) 552.00p -3.58%National Express Group (NEX) 338.00p -3.43%Mcbride (MCB) 143.00p -2.89%PV Crystalox Solar (PVCS) 84.00p -2.89%Renishaw (RSW) 397.50p -2.33%