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Iranian women gather during a demonstration against the execution of prominent Shiite Muslim cleric Nimr al-Nimr (portrait) by Saudi authorities, at Imam Hossein Square in the capital Tehran on January 4, 2016. Tensions between Iran and its Sunni Arab neighbours reached new heights as Saudi Arabia and Gulf allies cut or downgraded diplomatic ties with Tehran in a row over the execution of a Shiite cleric. - 

You remember we started with capitalism and the vagaries thereof, China and global contagion and all that?

Here's the counter-example that proves the rule about the vagaries of capitalism, that is.

You've got two of the world's top ten oil producers Saudi Arabia and Iran at each other's throats, diplomatically speaking.

Oil today?

Both major benchmarks, West Texas Intermediate and Brent North Sea Crude, off at the close. 

That'd be the law of supply and demand right there.

 

Follow Kai Ryssdal at @kairyssdal