The fall in the crude oil price  was about $60 a barrel for most of the quarter, against $104 in  2014. Photograph: Reuters/Mike Blake/Files

The sharp fall in the crude oil price sent second-quarter earnings at ExxonMobil tumbling 52 per cent despite increased oil production and significant(...)

Philip O’Quigley, chief executive, Falcon Oil & Gas: “Shareholders don’t want to wait 20 years for a payback. We’re setting ourselves up to sell. Ultimately, that’s what we want to do.” Photograph: Dara Mac Dónaill

Philip O’Quigley, the chief executive of Falcon Oil & Gas, leans back in his chair on the balcony outside his Dublin office, balancing it momen(...)

 Royal Dutch Shell chief executive Ben van Beurden. In London, the company’s shares fell 2.1 per cent, trimming nearly 10 points off the FTSE 100.  Photograph:  Benoit Tessier/Reuters

European stocks slid, erasing a weekly gain, amid increasing concern that Greece’s efforts to renegotiate its debt and stay in the single currency (...)

An anti shale-extraction poster in New York state.

The United States has taken Russia’s crown as the biggest oil and natural-gas producer in a demonstration of the seismic shifts in the world energy la(...)

 Nicolas Hulot, the French president’s envoy, said there was a new awareness on the part of the world’s two biggest sources of greenhouse gas emissions. Photograph: Frederic Stevens/Getty Images

When asked what is at stake in next December’s COP 21 conference on global warming, Nicolas Hulot quotes a participant at a recent climate change gath(...)

With its £47 billion (€64.6bn) purchase of BG Group, Royal Dutch Shell has consolidated its position as a leading liquefied natural gas player. REUTERS/Brian Snyder

With its £47 billion (€64.6bn) purchase of BG Group, Royal Dutch Shell has consolidated its position as a leading liquefied natural gas player.But alo(...)

 Royal Dutch Shell is in advanced talks for a possible takeover with British BG Group, the former British Gas. (Photograph: ANDY RAIN/EPA)

Royal Dutch Shell has agreed to buy smaller rival BG Group for $70 billion in the first oil super-merger in more than a decade to close the gap with t(...)

A crude oil storage tank  at the Enbridge Inc Cushing storage terminal in Cushing, Oklahoma, US. Photograph: Daniel Acker/Bloomberg

The world’s largest oil and gas groups shed more than a billion barrels of reserves in 2014, the sharpest decline in at least six years, according to (...)

Ryanair put in another strong performance, on back of steady volumes, closing the day 29 cent or 3.3 per cent up at €9.96 following a sector-wide trend. Photograph: Robin Townsend/EPA

Stock markets around the world clung to modest gains on Thursday, with European equities retreating from seven-year highs, after Germany rejected a(...)

NYSE traders: Critics say cap-weighted indices run the risk of significant declines if a handful of constituent stocks tumble and that tracker funds will end up being too invested in overpriced stocks, and too little in underpriced stocks. Photograph: Brendan McDermid/Reuters

Traditionally, investors had two choices – track stock markets by buying low-cost index funds, or opt for more expensive active funds that try to beat(...)