Comments and Complaints
Cboe Investor Complaint Form
Please complete the complaint form with as much information as possible. This will help lessen the need to contact you further and will allow for the most prompt and thorough investigation of your complaint. All information will be treated in confidence to the fullest extent possible and Cboe Rules enable Cboe to protect the identity of a complainant. However, Cboe cannot guarantee that during the course of completing its investigation or possible prosecution of the matter that the source of the complaint will not become known. Please do not send duplicate copies of your complaint by mail if you are submitting your complaint online.