A Bahraini protester holds a picture of Saudi Shiite cleric Sheikh Nimr al-Nimr during a rally denouncing his execution by Saudi Arabia.

Saudi-Iran rift dashes output hopes

​The collapse in relations between Saudi Arabia and Iran puts an end to speculation that OPEC could somehow agree production curbs to lift the price of oil.

The trading rules were triggered on Monday as stocks plunged in their worst-ever start to a year.

China open to circuit-breaker tweaks

China's securities regulator signalled it's open to tweaking the country's new market circuit breakers after analysts blamed the rules for exacerbating a $US590 billion rout in stocks on Monday.