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Algos, Barriers, Rumors: Some Theories On What Caused The Pound Flash Crash


As reported moments ago, just around 7:07pm ET, cable snapped and plunged by what some say may have been as much as 1200 pips, dropping from 1.26 to as low as 1.14 according to some brokers, before snapping back up.

Algos, Barriers, Rumors: Some Theories On What Caused The Pound Flash Crash


What caused the move? While nobody knows the catalyst behind the flash crash  yet, Bloomberg has compiled several potential explanations.

  • “The GBP/USD slide could be due to erroneous order and/or flows related to stop-loss orders or options given USD/JPY or EUR/USD aren’t moving much”, says Toshihiko Sakai, Tokyo-based chief manager of FX and financial products trading at Mitsubishi UFJ Trust & Banking.
  • “Looks like there was a large GBP sell order amid thin liquidity”, says Kyosuke Suzuki, head of FX and money-market sales at Societe Generale.
  • Others believe that the massive move has been partly attributed to algos failing after traders targeted downside option barriers, say three Asia-based FX dealers. Traders typically place their nearest orders within 100 ticks of spot, which was at roughly 1.26 before today’s plunge.
  • The drop accelerated as liquidity disappeared, and dealers failed to load bids into their trading platforms, say traders. In other words, your plain, garden variety algo-facilitated flash crash, where the bid side suddenly disappears as one or more “liquidity providers” turn themselves off.
  • One trader told Bloomberg that his FX pricing aggregator of eight contributors blacked out for 30 seconds amid an absence of bids.
  • Furthermore, multiple large option barriers in the over-the-counter market were triggered, including 1.25 and 1.20, say traders.  Traders say they missed buy orders much lower down and had to scramble to cover inherited short positions, thus contributing to the roughly 500-point rally.

Algos, Barriers, Rumors: Some Theories On What Caused The Pound Flash Crash




Hopefully we will have a clear, official, and accurate answer from regulators for the crash soon: investors faith in broken markets is already non-existent as it is. However, if the May 2010 flash crash is any indication, the reason behind the collapse may not be forthcoming until 2021, and even then it will be blamed on some spoofer, living in his parents’ basement.

Another question: whether any FX brokerages will need a bailout a la the infamous FXCM, in the aftermath of the Swiss National Bank revaluation of January 2015, as clients find themselves margined out and underwater even as cable is steadily recovering most, if not all losses.

Whatever the reason, however, Kuroda will take two.

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Tyler Durden
ZeroHedges' Tyler Durden is the hero of Fight Club, the 1999 movie based on Chuck Palahniuk's novel that reflected Chuck's experience in the Cacophony Society Quote: "Goddamn it, an entire generation pumping gas, waiting tables, slaves with white collars. Advertising has us chasing cars and clothes, working jobs we hate so we can buy shit we don’t need. We’re the middle children of history, man. No purpose or place. We have no Great War. No Great Depression. Our Great War’s a spiritual war… our Great Depression is our lives. We’ve all been raised on television to believe that one day we’d all be millionaires, and movie gods, and rock stars. But we won’t. And we’re slowly learning that fact. And we’re very, very pissed off." --> see more about Tyler on snbchf
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