Don't think so. If it spooked shareholders the volume would not be so pathetically low. This is more like the tide retreating before a tsunami.

Quote:

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A more immediate and ominous sign of an approaching tsunami is a rapid and unexpected recession of water levels below the expected low tide. This can occur minutes before the shoreline is struck by a tsunami and can be the only sign along coastlines that are located too far from the earthquake epicentre to have felt the shaking.

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https://www.getprepared.gc.ca/cnt/hzd/tsnms-bfr-en.aspx