SEC and exchanges to implement market-wide halt mechanisms in bid to prevent another flash crash

ETFs were particularly badly hit during the flash crash that hit the US stock market on 6 May. This occured due to withdrawal of liquidity from the market and the industry is now working to prevent a repeat.


The ‘flash crash’ in the US on May 6 hit exchange-traded funds (ETFs) harder than any other security because exchanges trade the instruments completely electronically without a system for pausing trading, something the Securities Exchange Commission (SEC) is working with the exchanges to rectify.

The New York Stock Exchange (NYSE), which has the largest market share in the US, has what it calls a liquidity replenishment programme (LRP) in place on its main trading floor, which halts trades when

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