Broker UBS has issued a downbeat assessment of the European semiconductor market but it makes an exception with chip designer ARM, and has raised its price target for the Cambridge-based firm from 305p to 370p a share. There is also speculation that Samsung is choosing to use ARM technology in new products. Nomura Securities has issued a buy note on British gas-owner Centrica. Nomura has carried out a review of the home services market in the UK and believes that Centrica's operations in this sector are well placed to at least meet internal targets of nearly doubling operating profit by end-2012.Hedge fund firm Man Group is higher after it announced that its pre-close trading statement will be on 28 September.As it is Wednesday, the fallers are dominated by companies going ex-dividend. Four companies have gone ex-dividend - Diageo, G4S, SEGRO and Rexam - but only the latter has fallen more than its dividend payment. G4S has fallen 1.5p a share, whereas the dividend is 3.17p a share. SEGRO's dividend is 4.7p a share but the shares have barely fallen by one-half of that figure. FTSE 100 - RisersARM Holdings (ARM) 380.20p +3.79%ICAP (IAP) 431.80p +2.96%Inmarsat (ISAT) 707.50p +2.61%Xstrata (XTA) 1,093.50p +2.20%Antofagasta (ANTO) 1,099.00p +2.14%Centrica (CNA) 337.90p +2.05%Man Group (EMG) 230.30p +2.04%African Barrick Gold (ABG) 611.00p +2.00%BP (BP.) 414.75p +1.95%Hammerson (HMSO) 381.30p +1.90%FTSE 100 - FallersInvensys (ISYS) 264.30p -1.82%Diageo (DGE) 1,085.00p -1.81%Rexam (REX) 308.60p -1.56%Barclays (BARC) 309.35p -1.48%HSBC Holdings (HSBA) 655.00p -1.12%SEGRO (SGRO) 263.90p -1.05%Prudential (PRU) 583.00p -0.93%Petrofac Ltd. (PFC) 1,392.00p -0.93%Smith & Nephew (SN.) 538.00p -0.74%G4S (GFS) 253.30p -0.67%