Full year results from William Hill boosted share prices, as the bookmarker jumped ahead of forecasts despite falling at a fourth quarter hurdle, as football and horse racing results favoured punters.The group was forced to officially distribute the figures at 20:00 on Monday after they were accidentally emailed to analysts. They revealed that net revenue was down 2% and operating profits were down 7% in the fourth quarter as "unfavourable" sports results were exacerbated by a large high-roller hit in its online casino.Vedanta Resources rocketed after an upgrade to 'neutral' from analysts at HSBC on Monday. They now have a £2.60 price target on the stock.Oil and gas services provider Petrofac was among the risers after receiving an award notification for the first phase of its $4bn project for Kuwait's state oil company. The Lower Fars heavy oil development program in the north of the country"This is a significant award for Petrofac in one of our core markets and complements theongoing projects we have in hand for both KOC and Kuwait National Petroleum Company," said Subramanian Sarma, managing director of Petrofac's onshore engineering & construction (OEC) business.After the Swiss National Bank caused a wave of client losses that led to a £30m hit on the company, forex and spread-betting provider IG Group found its share prices dipping, despite a strong set of interim results following a subdued first quarter.Shares in oil and gas group Afren were lower due to news that rumoured suitor T5 Oil & Gas is not interested in a takeover. T5, which is registered as New Horizon Oil and Gas Limited, put out a statement on Tuesday morning rebuffing rumours: "T5 Oil and Gas announces that it does not intend to make an offer for Afren Plc," it stated.Analysts at Canaccord said that Afren needs to refinance some of its debt in 2015 as a matter "of the utmost importance to the company's future as a standalone entity". RisersVedanta Resources (VED) 429.80p +8.26%Kaz Minerals (KAZ) 207.40p +6.36%Nostrum Oil & Gas (NOG) 482.00p +5.93%Supergroup (SGP) 969.50p +4.92%Lonmin (LMI) 183.40p +4.50%Petrofac Ltd. (PFC) 653.50p +4.39%3i Infrastructure (3IN) 159.30p +4.32%IG Group Holdings (IGG) 746.50p +4.11%Aveva Group (AVV) 1,383.00p +3.60%Synthomer (SYNT) 246.90p +3.52%FallersWilliam Hill (WMH) 364.40p -3.24%esure Group (ESUR) 226.90p -2.83%Playtech (PTEC) 646.00p -2.71%Bank of Georgia Holdings (BGEO) 1,933.00p -2.47%JD Sports Fashion (JD.) 501.00p -2.34%Afren (AFR) 27.16p -1.77%Ted Baker (TED) 2,360.00p -1.67%Ocado Group (OCDO) 402.90p -1.40%Berkeley Group Holdings (The) (BKG) 2,315.00p -1.24%Infinis Energy (INFI) 189.50p -1.10%