Can I trade Grey market stocks in my account?

IBKR generally does not offer clients the ability to trade on the Grey Market. A Grey Market could be described as dealers gauging interest for new share allotments before an IPO, or the stock has been suspended and is trading off-market. IBKR generally does not offer clients the ability to participate in an IPO (Initial Public Offering). In the event an IPO is open for clients, Client Portal's Trading > IPO Subscription menu will provide a list of currently active IPOs. 

Powered by IBot
What is an Initial Public Offering (IPO)?
Why can't I see an upcoming IPO on the list of IPOs?
Where can I find IPOs for which Interactive Brokers is accepting applications?
How long will Conditional Offers to Buy be accepted?