I am sure cbai was on the chill list. Why? Until last week, Zecco did not allow you to trade it online citing DTCC chill.
Here is the reply we got
Thank you for contacting Zecco Trading.
I understand your concern and apologize for the inconvenience. You are correct! According to the updates that we have received recently, CBAI has been removed from the Non- DTC eligible list. We have already submitted a request to the appropriate department to update the system. In the meantime, if you would like to trade this stock, please call in. We will be more than happy to assist you with your order. Our Customer Service Department's phone numbers are: 877-700-7862 and 818-459-4591.
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