Online grocer Ocado continued to rebound from Tuesday's heavy sell off which came on the back of an underwhelming set of interim results on Tuesday.Drax Group was lifted by Credit Suisse, which upgraded the stock from 'neutral' to 'outperform', and increased its target from 695p to 750p.Meanwhile, infrastructure group Balfour Beatty, which shocked the market with a profit warning in May, has maintained its guidance despite a "further worsening" in the trading performance of its mechanical and electrical engineering activities. Engineering Services, which accounts around 10% of the UK construction business, is now being reviewed after the company identified a "further £35m profit shortfall" in the first half, relating to issues with design changes, project delays, rework on projects and contractual disputes.Greene King was also a heavy faller after it warned that consumers were still cautious despite serving up tastier annual profits. Greene King, which owns the Hungry Horse pub restaurant chain, said a 5% rise in like-for-like food sales had driven a 4.1% increase in like-for-like sales in retail, its largest business, where profits rose 12%.Also in the red was DS Smith, after Goldman Sachs cut its target price from 267p to 259p. It did, however, upgrade it from 'conviction sell' to 'sell'. FTSE 250 - RisersOcado Group (OCDO) 439.60p +8.87%Man Group (EMG) 114.50p +6.71%Drax Group (DRX) 690.00p +4.55%African Barrick Gold (ABG) 227.50p +4.41%Poundland Group (PLND) 343.00p +4.35%Halfords Group (HFD) 494.10p +3.76%Fidessa Group (FDSA) 2,241.00p +3.75%Pace (PIC) 367.20p +3.67%Bodycote (BOY) 733.50p +3.60%Just Retirement Group (JRG) 153.50p +3.51%FTSE 250 - FallersBalfour Beatty (BBY) 221.50p -4.94%Greene King (GNK) 807.50p -4.66%Hays (HAS) 146.40p -3.11%EnQuest (ENQ) 138.00p -2.54%Wetherspoon (J.D.) (JDW) 794.00p -1.98%CSR (CSR) 599.00p -1.80%Rank Group (RNK) 170.00p -1.16%Smith (DS) (SMDS) 279.90p -1.03%Enterprise Inns (ETI) 128.70p -1.00%Renishaw (RSW) 1,628.00p -0.85%NR