Can I set a default action for voluntary corporate actions?

No, IBKR does not accept default or standing instructions from clients with respect to voluntary corporate actions. Client will be notified on a best efforts only basis of upcoming voluntary corporate action offers on positions held. Clients will then have an opportunity to review a summary of the offer and submit an election on-line.

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How do I manage Voluntary Corporate Actions?
I received a notification but I cannot confirm this corporate action in the news.
Where can I get information on a merger?