Trade in derivatives has been one of the most controversial activities in finance since the opacity around those markets was held by observers to blame for the scale and depth of the financial crisis of 2008. One of the key solutions recommended by regulators was to move trade in contracts onto exchanges, where they could be monitored more closely.

That effort showed early signs of success as the more-liquid contracts moved online but efforts to make exchange trading the default have faltered and – for many types of derivatives – actually reversed. Keep reading →