Lower precious metal prices have sent shares in Hochschild Mining, which produces silver and gold.Food stocks are wanted though, with Hovis-maker Premier Foods and butter and cheese firm Dairy Crest among the top-risers. Premier yesterday announced plans to raise £404m, or £379m net, from a placing and open offer at 26p a share.Homewares retailer Dunelm is the heaviest faller.FTSE 250 - RisersPV Crystalox Solar (PVCS) 89.00p +6.91%GKN (GKN) 139.50p +4.89%BlueBay Asset Management (BBAY) 197.50p +4.22%Premier Foods (PFD) 45.25p +3.43%ARM Holdings (ARM) 108.75p +3.33%Ashtead Group (AHT) 63.25p +3.27%De La Rue (DLAR) 887.50p +2.90%Wellstream Holdings (WSM) 567.50p +2.53%Dairy Crest Group (DCG) 333.25p +2.46%BTG (BGC) 147.50p +2.25%FTSE 250 - FallersDunelm (DNLM) 224.75p -5.47%London Stock Exchange Group (LSE) 726.50p -5.40%Melrose Resources (MRS) 272.25p -4.81%Hochschild Mining (HOC) 300.75p -4.60%Melrose (MRO) 101.75p -4.24%Novae Group (NVA) 359.00p -3.88%Weir Group (WEIR) 516.00p -3.46%Keller Group (KLR) 613.00p -3.31%F&C Asset Management (FCAM) 75.00p -3.23%Chaucer Holdings (CHU) 41.75p -2.91%