Wednesday broker round-up

BT Group: UBS downgrades from buy to neutral, target cut from 230p to 210p.Tullow Oil: finnCap retains sell rating and 1,000p target.Man Group: Peel Hunt keeps buy stance but puts 245p target under review.Vodafone: On UBS's most preferred telecoms list.Rio Tinto: UBS cuts target from 5,500p to 5,300p, buy stance unchanged; Credit Suisse reiterates outperform rating and 5,000p target.HSBC: UBS raises target from 520p to 540p, neutral recommendation maintained.Carnvial: UBS cuts target from 2,500p to 2,300p, buy rating unchanged.Invensys: UBS upgrades from neutral to buy, target lifted from 214p to 225p.African Barrick Gold: Investec puts 621p target under review, hold stance unchanged.BTG: Peel Hunt ups target to 340p, from 320p, buy rating maintained.JD Wetherspoon: Investec reiterates buy rating and 577p target; Peel Hunt reiterates buy and 490p target.Phoenix Group: Investec maintains hold and 562p target.DS Smith: UBS reduces target from 230p to 220p, neutral rating kept.Greene King: Investec cuts target from 381p to 375p, sell rating retained.Shanks: Peel Hunt cuts target from 135p to 126p, buy recommendation kept.APR Energy: Investec keeps buy recommendation and 1,230p target; Peel Hunt keeps hold rating and 1,000p target.IQE: Peel Hunt downgrades from buy to hold, target left at 23p.