James Harries is increasing exposure to oil and gas stocks in his Newton Global Higher Income fund, having compared the investment opportunities in the sector to those in the mining industry a few years ago.
The price of Brent crude oil has fallen as much as $3 per barrel, following a deal between Iran and other major world powers on nuclear activities.
Warren Buffett's Berkshire Hathaway has purchased a $3.45bn stake in oil company Exxon Mobil.
Royal Dutch Shell has seen a $2bn (£1.25bn) drop in third-quarter profits as costs across the business have soared.
Guy Monson, CIO of Sarasin & Partners, has outlined a number of key risks which could impact rising global equity markets as we head into 2014, amid the well-flagged move by the US central bank to wind down QE.