Shares of oil marketing companies (OMCs) surged in early trade on May 25 after petrol and diesel prices were raised for the fourth time in less than 10 days, boosting sentiment around the sector. Fuel prices were increased again on Monday, with petrol becoming costlier by Rs 2.61 per litre and diesel by Rs 2.71 per litre amid elevated global crude oil prices and a weakening rupee.