Are IPO Shares eligible for margin?

On an IPO’s first trade date, IBKR only allows using a Limit Order (you may select “Yes” to allow trading Outside RTH). You may use a Limit-on-Open order before the first actual trade. After the IPO’s first trade, once the stock is trading in the Secondary market, any order type can be used. Orders created and entered prior to the IPO’s first trade will be Price Capped by IBKR…

Yes. Shares received through an US IPO allocation are eligible to be utilized in the Stock Yield Enhancement Program once the IPO shares are settled (IPO first trade date + 2 business days). …

Once the shares are allocated into the account and the symbol has begun trading on the public exchanges, the shares can be sold.  There are no restrictions on selling the shares received via an US IPO…

Pursuant to the Securities Exchange Act of 1934 and the rules thereunder, any shares purchased through an US IPO offering will be subject to 100% margin for at least 30 days following the date on which the shares begin trading in the secondary market…