Ocado, the online grocery store, saw more than an 11% drop in its share price despite increasing its sales by almost one-fifth in the first 36 weeks of its financial yearThe group warned that investment in customer service will decrease its full year profit figure. Shares were rising ahead of JD Sports Fashion's half year results, to be announced on Wednesday, despite concerns from analysts that the chain will have borne the brunt of the latest economic turbulence. Investors will be looking to see how well the firm has beaten off the renewed competition from rivals Sports Direct and hoping that it maintains its position as one of the country's top retails. FTSE 250 - RisersBetfair Group (BET) 801.50p +3.82%JD Sports Fashion (JD.) 858.00p +3.37%Meggitt (MGGT) 327.80p +2.41%Perform Group (PER) 215.00p +2.38%Rightmove (RMV) 1,257.00p +2.11%Drax Group (DRX) 522.00p +1.85%Gem Diamonds Ltd. (DI) (GEMD) 245.40p +1.83%Euromoney Institutional Investor (ERM) 552.50p +1.75%Laird (LRD) 149.00p +1.50%UK Commercial Property Trust (UKCM) 77.70p +1.44%FTSE 250 - FallersOcado Group (OCDO) 118.40p -11.44%Kofax (KFX) 299.75p -6.03%Spirit Pub Company (SPRT) 39.75p -5.36%International Personal Finance (IPF) 223.90p -5.33%Misys (MSY) 260.30p -5.31%AZ Electronic Materials SA (WI) (AZEM) 253.10p -5.06%Premier Foods (PFD) 12.42p -4.97%Lamprell (LAM) 277.80p -4.86%Rank Group (RNK) 129.50p -4.71%Renishaw (RSW) 1,167.00p -4.66%NR