After a new threat group claiming to be Fancy Bear and the Armada Collective used a DDoS attack to take down the New Zealand stock exchange, security experts say millions of dollars in infrastructure investment make it unlikely that major stock exchanges in New York, London or Hong Kong would suffer a similar take down, though the New Zealand attack could portend a larger attack.

Not only have those high-end exchanges have invested in infrastructure, “they don’t run their trading applications on the public Internet,” said Barrett Lyon, CEO of Netography.

“There’s very little chance a high-frequency trading platform in New York would sustain a DDoS attack, the network is too segmented,” he said. “I still don’t understand why the New Zealand exchange’s trading app got hit, it should be segmented from the public internet.”

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