Federal Register Publishes Final Rules for MEMX Crypto Asset Options Trading

The Securities and Exchange Commission's Division of Trading and Markets published a final rule in the Federal Register last week that few investors will read but many will feel. The order approves amended listing standards for MEMX LLC — the upstart exchange backed by a consortium of broker-dealers — to list and trade options on commodity-based trusts that hold digital assets. It is the first time a U.S. equities exchange has received explicit authority to list options on crypto-backed instruments under standard equity options rules.

Key Metrics at a Glance

What the Rules Actually Permit

MEMX's amended Rule 7210 creates a framework for listing options on commodity-based trusts that hold Bitcoin, Ethereum, and other digital assets classified as commodities by the CFTC. The options will trade under the same margin, settlement, and exercise protocols that govern equity options on the exchange.

The approval is narrower than it first appears. The SEC explicitly limited the underlying instruments to trusts that meet specific criteria: they must be physically backed, must have traded for at least 12 months, and must maintain average daily volume exceeding $50 million. Those conditions effectively restrict the initial options listings to the most liquid spot Bitcoin and Ethereum ETFs — primarily BlackRock's IBTC, Fidelity's FBTC, and Grayscale's GBTC.

The options themselves are American-style, exercisable any time before expiration, which creates different dynamics from the cash-settled crypto derivatives that trade on offshore platforms. Physical settlement means that exercising a call option results in delivery of the underlying ETF shares, which in turn requires the ETF sponsor to acquire the actual Bitcoin or Ethereum for creation baskets.

Why This Matters for Market Structure

Options markets perform functions that spot markets cannot. They provide price discovery through implied volatility, generate hedging instruments for institutional holders, and create leveraged exposure without the liquidation risks of futures contracts. For the Bitcoin ETF market, which has grown to over $60 billion in assets since January 2025, options represent the next layer of institutional infrastructure.

MEMX's entry is strategically significant because the exchange is owned by its members — Morgan Stanley, Fidelity, Citadel, and Virtu Financial among them — rather than by traditional exchange operators. That ownership structure means the firms clearing and trading MEMX options have direct incentives to ensure the products function smoothly, since operational failures would affect their own balance sheets.

Competitive Landscape

The comparison reveals a market segmentation that is about to consolidate. CME Group has dominated institutional crypto derivatives since 2017, but its products are cash-settled futures that do not create demand for physical Bitcoin. MEMX's physical-settlement options create a direct pipeline from options demand to spot ETF creation, which in turn generates Bitcoin spot market buying.

The Bitcoin Connection

Bitcoin options are where the market consequences are most visible. The options chain for IBTC will create implied volatility metrics that institutional investors have never had for Bitcoin spot products. Those volatility readings will feed into portfolio risk models, margin calculations, and structured product pricing in ways that futures-based volatility cannot.

The physical settlement mechanism also matters. When a call option is exercised, the option writer must deliver IBTC shares. If the writer does not own those shares, they must acquire them in the market or through the ETF creation mechanism. That creation mechanism — authorized participants delivering Bitcoin to the trust in exchange for shares — creates direct spot market demand that cash-settled derivatives do not generate.

Risks and Open Questions

The approval leaves several operational questions unresolved. The most immediate is whether MEMX's clearinghouse — The Options Clearing Corporation — can handle the unique risks of crypto-backed options during periods of extreme volatility. Bitcoin's price swings of 10% or more in a single session are common, and OCC's margin models may need recalibration to account for crypto-specific risk profiles.

There is also a question about market manipulation. The SEC's approval relied on surveillance sharing agreements between MEMX and the ETF sponsors, but those agreements have not been tested during a coordinated manipulation attempt. If options market makers withdraw liquidity during stress events — as they have occasionally done in equity markets — crypto options traders could face wider bid-ask spreads and execution delays than they anticipate.

TL;DR

• What: SEC approved MEMX's amended rules for listing options on commodity-based crypto trusts
• Why: Creates first U.S. equities exchange with authority to trade physical-settlement options on spot crypto ETFs
• Impact: Bitcoin options will generate implied volatility metrics and direct spot demand through physical settlement
• Watch: OCC margin model adjustments, liquidity during volatile sessions, and competing approvals for Nasdaq and NYSE

Sources

• SEC Federal Register Final Rule
• MEMX Rule 7210 Filing
• Options Clearing Corporation Risk Framework
• CME Group Bitcoin Futures Specifications

Filip Peshko is Senior Opinion Columnist & Blockchain Technology Analyst at TotesTek. He writes about Bitcoin, blockchain technology, crypto markets, Web3 infrastructure, digital asset custody, institutional adoption, and legislation affecting the crypto industry.