Thursday broker round-up

(ShareCast News) - Standard Chartered: Macquarie downgrades to underperform. Target price: 550.00p.Quarto Group Inc: Northland Capital Partners initiates new coverage with a buy, sets target price at 350.00p.Howden Joinery Group: N+1 Singer upgrades to buy.Sabmiller: Societe Generale downgrades to hold.Marks & Spencer Group: Canaccord Genuity restarts coverage with a hold, sets target price at 570.00p.Centrica: Goldman Sachs downgrades to neutral. Target price: 215.00p.Hochschild Mining: UBS reiterates to neutral, cuts target price to 80.00p.Lonmin: RBC Capital Markets reiterates to underperform , bumps down target price to 25.00p.Wetherspoon (j.d.): Citigroup reiterates to neutral, reduces target price to 720.00p. Wetherspoon (J.D) Hochschild Howden Joinery Centrica Standard Chartered Marks & Spencer