Primark and food products giant Associated British Foods was the high riser on the Footsie on Monday afternoon, extending gains after Friday annual general meeting at which it revealed a strong start t o the new financial year.Oil group Tullow Oil was performing well today, rebounding after its recent sell-off. The shares have lost 8.35% of their value over the last week after the company said that its Zaedyus-2 appraisal well offshore French Guiana came up dry. However, Galvan Research reiterated its 'buy' rating for the stock today, saying that the stock is now in "oversold territory" after falling sharply to its one-year support level.Sweeteners and food products group Tate & Lyle was on the rise after last week's investor seminar in Chicago. Investec, which maintained its 'buy' rating for the shares, said it was impressed by the meeting and the key takeaways were "innovation and collaborative capabilities, plus a potential cost advantage". Canaccord Genuity also kept its 'buy' recommendation, raising its target price for the stock this morning from 780p to 840p.Investec was also providing a lift to medical technology group Smith & Nephew after upgrading its rating from 'hold' to 'buy' to reflect: a more attractive valuation; a more positive view on the recent acquisition of Healthpoint Biotherapeutics; and "our sense that the benefits of the cultural shift driven by the CEO will become increasingly apparent over the next 12 months."Mining titan Eurasian Natural Resources Corporation (ENRC) was leading the fallers after saying that it is to buy the remaining 49.5% stake in Democratic Republic of the Congo (DRC) focused group Camrose Resources for $550m. The acquisition is an attempt to simplify its organisational structure and consolidate its position within the DRC. Power systems group Rolls-Royce was still under pressure after Thursday's news that it was under investigation by the Serious Fraud Office (SFO) after matters of bribery and corruption involving so-called "intermediaries" were discovered in Indonesia and China. According to media reports this weekend, Rolls-Royce has been accused of giving $20m and a new car to the son of the former Indonesian President to help the company win an engine contract.Advertising and media giant WPP was under the weather after Deutsche Bank lowered its rating for the stock to 'hold' and cut its target price for the share from 945p to 930p.FTSE 100 - RisersAssociated British Foods (ABF) 1,505.00p +1.35%Tullow Oil (TLW) 1,260.00p +1.20%Tate & Lyle (TATE) 767.00p +1.05%Smith & Nephew (SN.) 672.00p +0.90%Kazakhmys (KAZ) 752.00p +0.87%Randgold Resources Ltd. (RRS) 6,445.00p +0.86%Petrofac Ltd. (PFC) 1,698.00p +0.71%Johnson Matthey (JMAT) 2,458.00p +0.61%Pennon Group (PNN) 607.50p +0.58%GlaxoSmithKline (GSK) 1,356.50p +0.56%FTSE 100 - FallersEurasian Natural Resources Corp. (ENRC) 275.20p -2.76%Hargreaves Lansdown (HL.) 716.50p -2.52%Aviva (AV.) 359.40p -1.88%Experian (EXPN) 1,036.00p -1.43%Aggreko (AGK) 2,215.00p -1.29%Rolls-Royce Holdings (RR.) 886.00p -1.17%WPP (WPP) 859.50p -1.15%Weir Group (WEIR) 1,815.00p -1.09%Capita (CPI) 751.50p -1.05%Carnival (CCL) 2,434.00p -1.02%BC