Cboe Unleashes Custom Bitcoin ETF Options for Flexible Trading
Published Date: 8/20/2025
Notice
Summary
Cboe Exchange just made it easier and more flexible to trade options on popular Bitcoin funds like iShares Bitcoin Trust and Grayscale Bitcoin Trust. Starting now, investors can customize their trades with these FLEX options, giving them more control and new ways to invest. This change kicks in immediately and could open up fresh opportunities for anyone trading Bitcoin-related options.
Analyzed Economic Effects
4 provisions identified: 3 benefits, 1 costs, 0 mixed.
FLEX Options Now Allowed on Four Bitcoin Funds
If you trade options, Cboe now permits Flexible Exchange (FLEX) Equity Options on four Bitcoin exchange-traded funds/trusts: iShares Bitcoin Trust (IBIT), Grayscale Bitcoin Trust (GBTC), Grayscale Bitcoin Mini Trust (BTC), and Bitwise Bitcoin ETF (BITB). FLEX options let traders customize contract terms for exchange-listed equity options and are now available on these four Funds as of the Exchange filing (filed August 7, 2025).
25,000-Contract Aggregated Limit Remains
Cboe will aggregate any FLEX and non-FLEX option positions in the same Fund and apply a 25,000-contract position and exercise limit per Fund. If all options were exercised, that 25,000-contract cap corresponds to up to 2,500,000 shares in a Fund.
Exchange Trading Reduces OTC Counterparty Risk
The Exchange states that FLEX Fund Options traded on-exchange should mitigate counterparty credit risk compared with over-the-counter (OTC) contracts because the contracts are issued and guaranteed by The Options Clearing Corporation (OCC) and exchange trading provides greater price discovery and transparency.
Rule Change Operative Immediately Upon Filing
The Commission waived the normal 30-day operative delay and designated Cboe's proposed rule change as operative upon filing; the Exchange filed the proposed change on August 7, 2025, so FLEX trading on these Funds became effective upon that filing.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-12163 — The Trade-Through Rule and Locked and Crossed Markets Provisions of Regulation NMS
The SEC wants to scrap some old rules that stop stocks from being traded at worse prices and prevent confusing market quotes. This change affects stock traders and exchanges, aiming to simplify trading and possibly speed things up. If you want to share your thoughts, you’ve got until August 17, 2026, so don’t miss out!
2026-10373 — Registered Offering Reform
The SEC wants to make it easier and cheaper for more companies to sell their stocks and bonds to the public. They’re opening up special forms and benefits to more businesses, updating rules to be more modern, and cutting red tape by overriding some state rules. If you’re a company planning to raise money, these changes could speed things up and save you money, with feedback due by July 27, 2026.
2026-10222 — Enhancement of Emerging Growth Company Accommodations and Simplification of Filer Status for Reporting Companies
The SEC is making it easier for companies that report their finances by simplifying their categories into just two groups: big and small filers. Smaller companies, including emerging growth ones, will get more time to file reports and enjoy simpler rules, while big companies keep stricter standards. These changes aim to save time and money, with feedback open until July 20, 2026.
2026-07651 — Concept Release on Consolidated Audit Trail and Other Audit Trails and Data Sources
The SEC wants your thoughts on how it tracks stock market trades using the Consolidated Audit Trail and other data tools. They’re thinking about updating rules to keep up with new tech, privacy, and security needs, and to make sure the system is fair and cost-effective. If you’re involved in the stock market or data tracking, speak up by June 22, 2026!
2026-13114 — Self-Regulatory Organizations; Texas Stock Exchange LLC; Order Declaring Effective a Minor Rule Violation Plan
The Texas Stock Exchange (TXSE) just got the green light to use a Minor Rule Violation Plan that lets them handle small rule breaks with fines up to $2,500 without rushing to report each one immediately. This means TXSE can now report these minor slip-ups to the SEC every three months instead of right away, making things smoother and faster for everyone involved. Traders and firms on TXSE should keep an eye on this new, quicker way of handling small rule issues starting now!
2026-13182 — Joint Request for Comment on Further Implementation of Portfolio Margining and Cross-Margining of Securities and Derivatives
The CFTC and SEC want your thoughts on making it easier and smarter to manage money across stocks and derivatives together. This could help investors save money on margin requirements and make trading smoother. If you’re involved in trading or investing, speak up by August 31, 2026, to help shape these important changes.
Previous / Next Documents
Previous: 2025-15833 — Self-Regulatory Organizations; Nasdaq PHLX LLC; Notice of Designation of Longer Period for Commission Action on Proceedings To Determine Whether To Approve or Disapprove Proposed Rule Change To List and Trade Nasdaq Bitcoin Index Options
The SEC is taking extra time to decide if Nasdaq PHLX can list and trade new Bitcoin index options. This affects investors and traders interested in Bitcoin-based products, as the decision could open up fresh ways to invest or trade. The SEC’s deadline to approve or reject this change has been extended, so everyone’s waiting a bit longer before these options hit the market.
Next: 2025-15835 — Self-Regulatory Organizations; Cboe EDGX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Rule 21.15(b) (Exchange Data Products) To Adopt a New Market Data Report
Cboe EDGX Exchange is adding a new market data report to its existing data products, helping traders get better and faster info. This change affects anyone using Cboe’s data services and kicks in right away with no extra fees. It’s a smooth upgrade designed to keep market data fresh and useful.