Nasdaq, Cboe Fix Feeds Hit by Options Overload

Recent market volatility overwhelmed the Nasdaq BX and Cboe market depth feeds with so much activity that the exchanges did not have enough physical numbers to accurately represent it.

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Nasdaq’s BX Options market and the Chicago Board Options Exchange (Cboe) both implemented emergency updates to the software that runs their options market depth datafeeds last month after volatile markets stemming from the Covid-19 outbreak meant the exchanges literally ran out of sequence numbers to assign to orders in their systems.

On 10 days during February and March—February 25, 27, and 28, and March 2, 3, 4, 6, 10, 12, and 13—Nasdaq warned market participants that the BX Options Depth

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