(ShareCast News) - Investec downgraded four UK oil and gas stocks and upgraded one as it took a look at the sector. Investec downgraded Tullow Oil to 'sell' from 'hold' and slashed its price target to 170p from 385p. Put simply, it said you'd have to believe in significantly higher oil prices or M&A
Read moreAmerisur Resources announced the acquisition of Petro Dorado South America SA, a subsidiary of Petro Dorado Energy for a total payment of $6m. The oil and gas exploration and production company said the payments will be made in three instalment, with $3m upon closing, and two further instalment of $
Read moreShares in Amerisur Resources rose almost 10% early on Friday, after oil and gas explorer signed a deal that will link the company's Colombian project to the oil export network. The company said work on the project will be carried out by Petroamazonas, which runs the Amazonas pipeline network, and th
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