The Chicago Board Options Exchange (CBOE) and C2 Options Exchange are to list options on the stock of Twitter on 15 November. 

The contract specifications and Designated Primary Market Makers (DPMs) for the options are as follows –
 
Contract specifications:
 
• Initial strike prices: Will range from 35 to 50, in one-point increments
• Position limit: 25,000 contracts
• Expiration cycle: March, with introductory expirations in December, January, March and June
 
Designated Primary Market Maker (DPM):
 
• CBOE Designated Primary Market Maker: Morgan Stanley will serve as electronic DPM
• CBOE Lead Market Maker: Group One Trading will serve as LMM on the CBOE trading floor
• C2 Designated Primary Market Maker: Wolverine Trading will serve as DPM at C2