An iron law of financial markets is that volatility drives trading. Range-bound markets give consumers and producers little incentive to hedge and the becalmed state of forex and commodity prices over the last couple of years has led to some frankly dull trading conditions. But now volatility is back.
The headline news is related to oil: black gold's price collapse in the last nine months has transformed economies – and politics – globally. It has also given a major fillip to banks' trading desk