Man accused of triggering billion-dollar Wall Street crash from suburban UK home loses extradition challenge

A British financial trader accused of helping trigger a multibillion-dollar Wall Street crash from a suburban UK home has lost a High Court challenge against a decision that he can be extradited to the US to stand trial.

Navinder Singh Sarao, 37, dubbed the Hound of Hounslow, is wanted in America over allegations that he contributed to the 2010 Wall Street ''Flash Crash'' from his parents' home 3,500 miles (5,633km) away in west London.