Both the Chairman and the Chief Investment Officer at asset management firm Schroders have announced their intention to step down from their respective roles, a move which caused shares to take a swift dive. Meanwhile, miners were among the highest risers of the day, with Kazakhmys, Antofagasta, Vedanta Resources, Rio Tinto, ENRC, Evraz and Randgold Resources all making gains of at least 3% each in the morning session. The widespread rise came as commodity prices got a lift, boosted by hopes that Greece can secure its next bailout if the debt-swap deal is successful.Xstrata was also in demand after agreeing to acquire the Sukunka hard coking coal deposit from Talisman Energy for $500m cash. "Based on our due diligence and technical analysis, Sukunka has the potential to be a high quality metallurgical coal mine," said Xstrata Coal's Chief Executive Peter Freyberg. Supermarket giant Morrison also jumped as it beat both sales and profit expectations in 2011, after seeing a record number of customers in its stores. Turnover excluding VAT rose 7% to £17,663m in the 12 months ended January 29th, ahead of expectations of £17,570bn. Jefferies reiterated its buy rating on the stock this morning, saying Morrison is "delivering for shareholders again", after raised its total dividend by 11%. FTSE 100 - RisersHammerson (HMSO) 406.50p +4.23%Petrofac Ltd. (PFC) 1,654.00p +3.96%Rio Tinto (RIO) 3,482.00p +3.32%Antofagasta (ANTO) 1,270.00p +3.25%Vedanta Resources (VED) 1,387.00p +3.20%Johnson Matthey (JMAT) 2,326.00p +3.15%Burberry Group (BRBY) 1,482.00p +3.13%Kazakhmys (KAZ) 971.50p +3.13%Eurasian Natural Resources Corp. (ENRC) 674.50p +2.98%Meggitt (MGGT) 398.60p +2.92%FTSE 100 - FallersMan Group (EMG) 142.80p -2.26%Schroders (SDR) 1,533.00p -1.79%Schroders (Non-Voting) (SDRC) 1,229.00p -0.49%SSE (SSE) 1,289.00p -0.31%Centrica (CNA) 306.70p -0.29%NR