Hargreaves Lansdown, the financial services provider and asset management group, rose strongly after seeing a record level of Assets under Administration (AuA) in the three months to March 31st despite the tough macro-economic conditions.Engineer IMI was a high riser after Jefferies upgraded its rating on the stock from hold to buy, saying that while the group isn't exactly geared for high growth, it does provide high returns.Insurance group Prudential was also gaining after some positive broker commentary with UBS raising its target price on the stock, saying that it is trading in line with UK peers "which is anomalous given its Asian exposure." Meanwhile oil and gas firm Tullow was a big faller following its announcment that its Mercury-2 exploratory appraisal well in Sierra Leone and the Kosrou-1 exploration well in Côte d'Ivoire have both encountered water bearing reservoirs with oil shows. FTSE 100 - RisersHargreaves Lansdown (HL.) 502.50p +4.36%Rolls-Royce Holdings (RR.) 835.00p +2.71%Croda International (CRDA) 2,270.00p +2.44%Serco Group (SRP) 563.00p +1.90%Prudential (PRU) 753.00p +1.55%Evraz (EVR) 374.90p +1.52%Vodafone Group (VOD) 172.35p +1.44%Kazakhmys (KAZ) 873.50p +1.39%Imperial Tobacco Group (IMT) 2,537.00p +1.36%IMI (IMI) 972.50p +1.35%FTSE 100 - FallersMan Group (EMG) 93.25p -6.38%Aviva (AV.) 301.30p -2.08%Royal Bank of Scotland Group (RBS) 23.96p -1.92%CRH (CRH) 1,229.00p -1.60%Morrison (Wm) Supermarkets (MRW) 293.90p -1.48%GKN (GKN) 206.20p -1.43%Tullow Oil (TLW) 1,497.00p -1.38%Tate & Lyle (TATE) 680.00p -1.38%International Consolidated Airlines Group SA (CDI) (IAG) 168.70p -1.23%Eurasian Natural Resources Corp. (ENRC) 562.00p -1.23%NR