Flash Crash of the Pound Baffles Traders With Algorithms Being Blamed

  • Was the cause ‘a fat finger, or just algos?’ Janus’ Myerberg
  • Sterling dives 6.1% in minutes during Asia hours, snaps back

Sterling Flash Crash: Pound as Brexit Shock Absorber

Lock
This article is for subscribers only.

During two chaotic minutes of Asian trading, the pound plunged the most since the Brexit referendum in June, with traders saying computer-initiated sell orders exacerbated the slump.

The 6.1 percent drop drove sterling to a 31-year low of $1.1841, according to composite prices compiled by Bloomberg of contributions from dealers. Traders speculated the crash might have been sparked by human error, or a so-called “fat finger,” with algorithms adding to selling pressure at a time of day when liquidity is relatively low.