Institutional

 

CBOE FLEX® Options

Login to CFLEX
Register for "View Only" Access
CFLEX API
FLEX Price and Open Interest Reports

Welcome To CFLEXSM

Welcome to CFLEXSM, CBOE's new low-cost, internet-based FLEX system. CFLEX retains the existing advantages of exchange-traded FLEX options while providing a substantial improvement in operational efficiency. Connectivity to the system has been designed to be attractive and user-friendly - a signed user agreement and internet accessible workstation are all that is required.

  • Internet based; stand-alone, browser-based application available or may be accessed via the internet through our API;
  • Trader Chat;
  • Strict Price-Time matching algorithm;
  • Anonymous trading;
  • Live Order Books;
  • Secondary auction market to alter or completely offset the position.


Why FLEX Options on CFLEX?

  • Transparency of price and terms;
  • Administrative ease;
  • Reliable and secure;
  • Clearing guarantees by the AAA-rated Options Clearing Corporation (OCC);
  • Price discovery of competitive auction market;
  • Daily valuation by an independent party (OCC).


CFLEX User Documentation

CFLEX User Guide
CFLEX Application and Guarantee Form in Adobe Acrobat Format
CFLEX Sponsored User Agreement in Adobe Acrobat Format
CFLEX Quick Reference Guide in Adobe Acrobat Format



FLEX Options Product Information

RG10-023: FLEX Expiration Blackout Period Requirements
RG10-022: CFLEX Settings & Trading Procedures (Revised)
RG10-021: Approval of FLEX Pilots
RG09-037: Elimination of FLEX Expiration Blackout Period
Equity FLEX Options
Index FLEX Options
FLEX Price and Open Interest Reports
FLEX Options Product Specifications in Adobe Acrobat Format



CFLEX Press Releases



About Cinnober

Cinnober Financial Technology develops exchange and marketplace solutions for the financial, commodity and energy markets. Cinnober's products are all based on the in-house developed platform TRADExpress, and powers some of the largest exchanges in the world with high performance and reliability. The development is performed in 100% Java, which enables flexible, fast and platform independent solutions built for high capacity. For more information on Cinnober Financial Technology, visit their website at www.cinnober.com.


Questions? Contact us at CFLEX@cboe.com.




Options involve risk and are not suitable for all investors. Prior to buying or selling an option, a person must receive a copy of Characteristics and Risks of Standardized Options (ODD). Copies of the ODD are available from your broker, by calling 1-888-OPTIONS, or from The Options Clearing Corporation, One North Wacker Drive, Suite 500, Chicago, Illinois 60606. The information on this website is provided solely for general education and information purposes and therefore should not be considered complete, precise, or current. Many of the matters discussed are subject to detailed rules, regulations, and statutory provisions which should be referred to for additional detail and are subject to changes that may not be reflected in the website information. No statement within the website should be construed as a recommendation to buy or sell a security or to provide investment advice. The inclusion of non-CBOE advertisements on the website should not be construed as an endorsement or an indication of the value of any product, service, or website. The Terms and Conditions govern use of this website and use of this website will be deemed acceptance of those Terms and Conditions.