Mining giant BHP Billiton slipped 2p to 405p after Morgan Stanley cut its rating from overweight to equal weight as it reduced its stance on the mining sector to neutral. Instead, it favours rival Rio Tinto, up 23p at 1350p, which it has moved from equal weight to overweight and raised its price target by 1300p to 1400p. Elsewhere in the mining sector, Xstrata retreated 5 1/2p to 466p after Deutsche Bank cut its recommendation from buy to hold. The broker has lifted its price target from 471p to 500p.