Berkeley is the heaviest faller after fewer sales and lower prices sent profits at the London and south-east focused housebuilder tumbling in the latest six months.Housebuilder Bellway slips even after saying ales volumes for the first six months to 31 January 2010 will be 10% better than the same time last year, with an operating margin steady at 6% to 7%, but at least stays out of the bottom 10.But elsewhere in the sector, Redrow, Persimmon, and Barratt are among the heaviest fallers.Recruiter SThree confirmed profits will tumble this year, but investors took heart from its view that conditions have started to stabilise and the shares are up nearly 5%.FTSE 250 - RisersSports Direct International (SPD) 108.30p +5.15%SThree (STHR) 258.90p +4.61%PV Crystalox Solar (PVCS) 61.40p +4.24%Dunelm Group (DNLM) 421.20p +3.31%National Express Group (NEX) 183.70p +3.20%Catlin Group (CGL) 323.50p +2.37%Robert Wiseman (RWD) 498.00p +2.28%Mothercare (MTC) 656.50p +2.18%IMI (IMI) 523.00p +2.15%Genus (GNS) 619.50p +2.06%FTSE 250 - FallersBerkeley Group Holdings (BKG) 848.00p -4.93%Barratt Developments (BDEV) 118.10p -4.83%St. Modwen Properties (SMP) 206.10p -4.14%BBA Aviation (BBA) 155.70p -4.13%Synergy Healthcare (SYR) 652.00p -4.12%Persimmon (PSN) 455.60p -3.84%Enterprise Inns (ETI) 100.10p -3.75%CSR (CSR) 404.80p -3.62%Redrow (RDW) 133.40p -3.61%Morgan Crucible (MGCR) 150.90p -3.52%