Algo trading harmed market during Swiss franc crash – paper

Algorithmic traders tended to “consume liquidity and reinforce the price disruption”

Swiss central bank abandons euro peg
The Swiss franc moved dramatically against the euro on January 15, 2015

Algorithmic trading appears to have worsened “market quality” during the Swiss franc crash in January 2015, a staff working paper published by the Bank of England finds.

The euro/Swiss franc currency pair suffered extreme volatility on January 15 that year after the Swiss National Bank removed its “ceiling” for the Swiss franc. The authors found algo trading tended to suck liquidity from the market while exacerbating volatility. Human traders were the opposite – adding liquidity and calming

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