Mohammed Saleh Al-Sada tells Qatar-UK Business Forum that Opec cuts have been successful and need to be extended beyond Q3 2017.
Dollar sinks as investors grow doubtful over Donald Trump's ability to push through his policies.
Markets took their first chance to give their verdict on Trump's failure to replace Obamacare.
There could be much to go for in 2017 given increasing signs global economy is getting into recovery mode.
Investors are said to doubt Trump's ability to push through major reforms.
US president greenlight's controversial 4th phase of pipeline, rejected by President Barack Obama in 2015.
US President Donald Trump says he will leave Obamacare in place unless Congress vote on his plan.
Dollar struggles for direction ahead of vote on Donald Trump's healthcare plan.
The vote on whether Obamacare should remain or be replaced will be held later in the day.
Safe haven buyers send gold, silver higher following suspected terror attack in the UK capital.
Next tops the leaderboard despite delivering its first fall in sales in eight years.
Yen remains on track for best winning streak in six years as investors turn to safe havens.
Wall Street banks are setting themselves up for the next systemic crisis by financial experimentation in the derivatives market.
Investors remain concerned over the key health care vote in Congress, which is due later in the day.
Investors concerned fight over healthcare may slow down Trump's pro-growth policies.
High stockpile build-up stateside accelerates intraday losses in the oil market.
Bank of America Merrill Lynch poll finds that shares may be at their most overvalued in 17 years.
Dollar remains under pressure as investors grow concerned over Donald Trump's policies.
Investors are said to be re-evaluating their optimism on Trump's ability to deliver on his promises.
Could the Trump market high be coming to an end?
Brent and WTI heading lower as fears of rising US crude production makes transatlantic money managers cagey.
Consumer Prices Index inflation hit 2.3% in February, the highest level since September 2013.
Inflation exceeds analysts' expectations of 2.1% in February, driving sterling to multi-week highs against euro and dollar.
The mixed trend follows RBA highlighting the growing risks in the Australian housing market.
Top flight shares get off to a slow start after hitting two record highs last week.
Sterling slips from three-week high against dollar after Downing Street confirmed Brexit process will begin next week.
US rigs count rises for the ninth consecutive week, with production now exceeding 9m barrels per day.
G20 leaders reiterated their warnings against competitive devaluations and disorderly foreign exchange markets.
Shares edge higher after US interest rate rise and win for moderate parties in Dutch elections.
US indices were subdued following strong gains on Wednesday amid the US Fed's rate increase decision.