My understanding is that with it being grey, the seller can cancel at their discretion until settlement date. I don't know though. This is my first grey.
It would be 'client-error' if my theory is correct and someone had a stop-limit. Order. This would totally explain the dip... just not sure if they can cancel or not. That's $1200 or so down the drain, certainly enough that I'd call on it!
Schwab is showing 181,000k less volume then what is reported here so maybe there was a mistake and it's been corrected.? Either way charts mean nothing here to us longs.
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