Tullow Oil is being tipped as a buy by ABN-Amro. The brokers believe the stock offers a unique exposure to oil and gas exploration acreage with significant potential in fast-growing energy markets in the Indian sub-continent and Africa. The prospect of material reserve additions from drilling success on both existing and expected acreage in the Indian sub-continent is substantial.

Shares are trading at around 45p sterling (64 cents) with ABN-Amro forecasting that it could rise as high as £1 sterling.