Housebuilder Persimmon saw a rise in the number of home sales on which it achieved completions in the second half of 2009, but said it remains cautious on mortgage availability and the general economic situation. Peer Taylor Wimpey is leading the way, with Barratt Developments, Berkeley Holdings and Bovis Homes also going well.Today's heaviest faller is Tate & Lyle, after broker Credit Suisse turned sour on the firm, downgrading the stock from 'outperform' to 'neutral', amid worries the annual round of price setting is not going too well.Digital TV set-top box maker Pace said it is on target to meet management expectations for the twelve month ended 31 December, but is among today's 10 biggest percentage fallers. Bus and rail group National Express is also lower following the Office of Fair Trading's (OFT) referral of local bus services to the Competition Commission (CC) after it concluded that low levels of competition may be resulting in poor outcomes for bus users and taxpayers. FTSE 250 - RisersTaylor Wimpey (TW.) 41.95p +5.96%Persimmon (PSN) 492.70p +5.05%Bodycote (BOY) 176.60p +4.50%Barratt Developments (BDEV) 137.60p +4.24%Heritage Oil (HOIL) 488.90p +3.47%Trinity Mirror (TNI) 167.70p +3.39%Berkeley Group Holdings (BKG) 863.00p +3.29%Rightmove (RMV) 524.00p +3.25%Bovis Homes Group (BVS) 430.40p +3.16%Interserve (IRV) 214.90p +3.02%FTSE 250 - FallersTate & Lyle (TATE) 421.50p -5.81%Brit Insurance Holding (BRE) 191.50p -5.06%Marston's (MARS) 87.75p -3.36%Pace (PIC) 203.30p -3.19%Yell Group (YELL) 38.40p -3.03%Moneysupermarket.com (MONY) 74.75p -2.92%National Express Group (NEX) 190.90p -2.75%PayPoint (PAY) 450.60p -2.68%PartyGaming (PRTY) 269.00p -2.54%Ferrexpo (FXPO) 220.60p -2.52%