Is there any lag between price movements and index/ETFs movements?

Can ETFs quote prices instantaneously, or is there a lapse in time between say, a large AMZN price movement and the subsequent QQQ response? If so, can it theoretically be exploited with an algo?

Submitted October 21, 2020 at 04:54PM by WhatreyaCANADIAN
via https://ift.tt/3jhATpa

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