Skip to main content

Concept

Intersecting digital architecture with glowing conduits symbolizes Principal's operational framework. An RFQ engine ensures high-fidelity execution of Institutional Digital Asset Derivatives, facilitating block trades, multi-leg spreads

The Bifurcation of Protocol Crypto versus Traditional Regulatory Frameworks

In the world of institutional crypto derivatives, the demand for precise, high-fidelity execution protocols is absolute. The operational challenge arises when frameworks designed for traditional capital markets, such as the European Union’s MiFID II, are conceptually mapped onto the digital asset landscape. A central point of friction is the Request for Quote (RFQ) process. For large-scale participants on a platform like greeks.live, the standard RFQ, while promoting competition, introduces the risk of information leakage ▴ a critical vulnerability when attempting to execute substantial blocks of options on assets like Bitcoin or Ethereum without moving the market.

The ability to justify a waived RFQ execution, moving to a direct or bilateral engagement, becomes a strategic necessity. This action is not about circumventing rules, but about achieving a superior execution outcome under specific, defensible conditions that prioritize the client’s end result.

The core implication of justifying a waived RFQ execution under MiFID II principles is the formalization of a process that institutional crypto traders have intuitively understood for years ▴ not all liquidity is equal, and not all trades benefit from maximum pre-trade transparency. Justifying a waiver requires a demonstrable and documented case that doing so is the most effective path to achieving “best execution.” This shifts the operational burden from simply broadcasting a quote request to a more sophisticated, data-driven pre-trade analysis. The trading desk must prove that for a particular transaction ▴ due to its size, the instrument’s specific characteristics, or prevailing market conditions ▴ a standard RFQ would likely lead to adverse price movements, slippage, or a failure to execute altogether. This elevates the execution process into a system of auditable, strategic decisions, where the choice of protocol is as significant as the trade itself.

Justifying a waived RFQ execution under MiFID II principles necessitates a documented, evidence-based rationale demonstrating that this path ensures superior execution quality by mitigating market impact for specific, large-scale crypto derivative trades.
A tilted green platform, wet with droplets and specks, supports a green sphere. Below, a dark grey surface, wet, features an aperture

Defining the Justification Thresholds in a Digital Asset Context

Translating MiFID II’s waiver justifications into the crypto derivatives space requires adapting its core tenets ▴ ”Large in Scale” (LIS) and “illiquid instrument” exceptions ▴ to the unique properties of digital assets. An LIS transaction in this context might be a multi-leg options strategy involving thousands of BTC contracts, where broadcasting the full inquiry could signal a firm’s directional view or volatility expectations to the broader market. The very act of seeking competitive quotes for such a size could trigger front-running or cause market makers to adjust their own pricing, resulting in a worse outcome for the originator.

Similarly, the concept of an “illiquid instrument” finds a powerful analogue in the crypto options market. While front-month, at-the-money ETH options may be highly liquid, a far-dated contract with a specific, unconventional strike price is functionally illiquid. There may only be a handful of counterparties globally with the capacity and appetite to price such a risk. In this scenario, a wide RFQ is inefficient and potentially fruitless.

Justifying a waiver allows the trader to engage directly with the few specialized liquidity providers capable of handling the order, securing pricing discreetly and efficiently. The regulatory implication is that platforms and participants must develop a rigorous, quantitative framework for defining and applying these thresholds, creating a clear, defensible policy for when a standard RFQ is suboptimal and a waiver is warranted. This transforms best execution from a qualitative goal into a quantifiable, protocol-driven discipline.


Strategy

A sophisticated dark-hued institutional-grade digital asset derivatives platform interface, featuring a glowing aperture symbolizing active RFQ price discovery and high-fidelity execution. The integrated intelligence layer facilitates atomic settlement and multi-leg spread processing, optimizing market microstructure for prime brokerage operations and capital efficiency

A Strategic Framework for Waived RFQ Justification

Developing a robust strategy for justifying waived RFQ executions in the crypto derivatives market involves creating a systematic, evidence-based framework that aligns with the principles of MiFID II’s best execution requirements. This is a proactive posture, designed to ensure that every decision to bypass a standard, multi-dealer RFQ is not only defensible but is demonstrably in the client’s best interest. The strategy rests on two primary pillars ▴ establishing quantitative, instrument-specific thresholds and maintaining a meticulous documentation protocol that substantiates the chosen execution path. This framework transforms the decision from a discretionary judgment call into a structured, auditable process that can withstand regulatory scrutiny while optimizing for superior execution quality.

The first pillar involves the pre-emptive definition of what constitutes a “Large in Scale” (LIS) or “Size Specific to the Instrument” (SSTI) order within the context of specific crypto derivatives. Unlike traditional equities, the crypto market’s volatility and fragmented liquidity demand a more dynamic approach. A trading entity would establish internal thresholds based on empirical data, such as a percentage of the average daily traded volume for a specific options series or a notional value that is known to create significant market impact.

For instance, an order exceeding a certain notional USD value or a set number of contracts for a given BTC or ETH options expiry could automatically qualify for consideration under the LIS waiver. This quantitative approach provides a clear, objective starting point for the justification process.

A successful strategy for waived RFQ execution hinges on a dual framework of pre-defined quantitative thresholds for order size and a rigorous, contemporaneous documentation process that proves the mitigation of adverse market impact.
A polished, dark teal institutional-grade mechanism reveals an internal beige interface, precisely deploying a metallic, arrow-etched component. This signifies high-fidelity execution within an RFQ protocol, enabling atomic settlement and optimized price discovery for institutional digital asset derivatives and multi-leg spreads, ensuring minimal slippage and robust capital efficiency

Pillar One the Quantitative Thresholds

To operationalize the LIS and illiquidity justifications, a firm must translate these concepts into hard numbers. This involves a rigorous analysis of market data to define what is “normal” and, by extension, what is exceptionally large or illiquid. The table below illustrates a potential internal framework for classifying crypto options orders, providing a clear basis for invoking a waived RFQ protocol.

Instrument Class Metric for LIS/SSTI Threshold for Waiver Consideration Rationale
BTC Options (Front Month, ATM +/- 10%) Notional Value (USD) > $25,000,000 Orders of this magnitude are likely to absorb a significant portion of the visible liquidity on the central limit order book (CLOB), leading to predictable slippage.
ETH Options (Front Month, ATM +/- 10%) Notional Value (USD) > $15,000,000 Reflects the generally lower, though still substantial, market depth for ETH options compared to BTC options.
BTC/ETH Options (>6 Months Expiry) Contract Size > 500 Contracts Long-dated options have significantly less liquidity and fewer active market makers; a large order requires specialized pricing.
Multi-Leg Spreads (e.g. Collars, Straddles) Complexity & Notional > $10,000,000 The requirement to price multiple legs simultaneously makes the order inherently illiquid and susceptible to information leakage if broadcast widely.
Metallic rods and translucent, layered panels against a dark backdrop. This abstract visualizes advanced RFQ protocols, enabling high-fidelity execution and price discovery across diverse liquidity pools for institutional digital asset derivatives

Pillar Two the Best Execution Documentation Protocol

The second pillar of the strategy is the creation of a comprehensive documentation trail. The justification for a waived RFQ cannot be an afterthought; it must be a contemporaneous record of the decision-making process. This protocol ensures that for every waived execution, a clear and compelling case for best execution can be presented. The following list outlines the essential data points to be recorded:

  • Pre-Trade Analysis ▴ A written assessment, timestamped, outlining why a standard RFQ was deemed suboptimal. This should reference the specific LIS or illiquidity threshold being met and include an analysis of prevailing market conditions, such as heightened volatility or thin order books.
  • Market Snapshot ▴ A record of the visible liquidity and pricing on the central limit order book and other relevant venues at the time of the decision. This provides a baseline against which the execution quality of the waived RFQ can be judged.
  • Counterparty Selection Rationale ▴ A clear explanation for why a specific liquidity provider or a small, select group of providers was chosen for the bilateral negotiation. This could be based on historical performance, demonstrated expertise in a particular instrument, or the ability to handle large-scale risk transfer.
  • Execution Quality Metrics ▴ Post-trade, a detailed analysis of the execution price against relevant benchmarks (e.g. the arrival price, the volume-weighted average price over a short interval). This data is crucial for demonstrating that the waived process resulted in a tangible benefit to the client.
  • Record of Client Consent ▴ Where applicable, obtaining and recording explicit client consent for the use of a waived RFQ execution methodology provides an additional layer of justification.

By combining quantitative thresholds with a rigorous documentation protocol, a trading entity can build a defensible and highly effective strategy for utilizing waived RFQ executions. This approach aligns with the spirit of MiFID II, using its flexibility not as a loophole, but as a sophisticated tool to achieve superior outcomes in the complex crypto derivatives market.


Execution

Beige module, dark data strip, teal reel, clear processing component. This illustrates an RFQ protocol's high-fidelity execution, facilitating principal-to-principal atomic settlement in market microstructure, essential for a Crypto Derivatives OS

The Operational Playbook for Justifiable Waivers

Executing a waived RFQ in a manner that is compliant with MiFID II’s principles requires a detailed, systematic, and auditable operational playbook. This is not a matter of informal decision-making but of a structured process that begins well before the trade is initiated and concludes with rigorous post-trade analysis. The playbook ensures that every step is deliberate, documented, and focused on the singular goal of achieving best execution for large or complex crypto derivative orders. It provides the necessary framework to demonstrate that bypassing a wider competitive auction was a superior strategic choice, not a matter of convenience.

The execution of a justifiable waived RFQ is an end-to-end system of control, integrating pre-trade quantitative analysis, structured counterparty engagement, and post-trade performance validation to build an unimpeachable audit trail.

The process can be broken down into three distinct phases ▴ Pre-Trade Validation, Execution Protocol, and Post-Trade Substantiation. Each phase has its own set of procedures and documentation requirements that collectively form a cohesive and defensible record of the transaction. Adherence to this playbook is critical for any institutional desk operating in the crypto derivatives space that seeks to leverage the strategic advantages of discreet liquidity sourcing.

Abstract geometric forms in blue and beige represent institutional liquidity pools and market segments. A metallic rod signifies RFQ protocol connectivity for atomic settlement of digital asset derivatives

Phase 1 Pre-Trade Validation and Documentation

This initial phase is the foundation of the entire justification. It is where the decision to waive the RFQ is made and the evidence supporting that decision is gathered. The objective is to build a clear, time-stamped case file before engaging any liquidity providers.

  1. Order Qualification ▴ The order is first assessed against the firm’s pre-defined quantitative thresholds (as outlined in the Strategy section). The trader must document which specific criterion the order meets (e.g. exceeds LIS notional value, qualifies as an illiquid instrument due to expiry and strike).
  2. Market Impact Analysis ▴ A quantitative assessment of the potential market impact of a standard RFQ is conducted. This involves modeling the likely slippage based on the visible order book depth and recent volatility. The output of this model ▴ an estimated cost of information leakage ▴ is a key piece of evidence.
  3. Creation of the Justification Memo ▴ A formal, timestamped digital memorandum is created. It must contain:
    • The specific justification for the waiver (LIS, illiquid instrument).
    • The output of the market impact analysis.
    • A snapshot of current market conditions (e.g. bid-ask spread, order book depth).
    • The proposed execution strategy, including the rationale for selecting specific counterparties.
Angular translucent teal structures intersect on a smooth base, reflecting light against a deep blue sphere. This embodies RFQ Protocol architecture, symbolizing High-Fidelity Execution for Digital Asset Derivatives

Phase 2 the Execution Protocol

With the justification formally documented, the execution phase focuses on discreetly engaging with selected liquidity providers and securing the best possible terms. The emphasis is on control and minimizing information leakage.

Step Action System/Tool Documentation Requirement
1. Secure Engagement Initiate a bilateral or mini-auction RFQ with the pre-selected counterparty/counterparties. Institutional RFQ Platform (e.g. greeks.live), Encrypted Chat Timestamped record of all communications, including initial inquiry and all quotes received.
2. Quote Evaluation Analyze received quotes against pre-trade benchmarks, including the arrival price and the firm’s internal valuation model. Internal Pricing Models, TCA System A log of all quotes, with a documented reason for the selection of the winning quote (e.g. price improvement, size capacity).
3. Trade Execution Execute the trade with the chosen counterparty. Trading Platform API, OMS Official trade confirmation record, including execution time, price, and notional value.
A robust metallic framework supports a teal half-sphere, symbolizing an institutional grade digital asset derivative or block trade processed within a Prime RFQ environment. This abstract view highlights the intricate market microstructure and high-fidelity execution of an RFQ protocol, ensuring capital efficiency and minimizing slippage through precise system interaction

Phase 3 Post-Trade Substantiation and Review

The final phase involves analyzing the results of the trade to prove that the waived RFQ protocol did, in fact, lead to a better outcome. This closes the loop and completes the audit trail.

A Transaction Cost Analysis (TCA) report is generated for the trade. This report is the ultimate piece of evidence, comparing the execution quality against a range of benchmarks. It provides a quantitative answer to the question ▴ “Did this waived execution achieve the best possible result for the client?” The data below illustrates a sample TCA report for a waived RFQ execution of a large BTC options block.

TCA Report ▴ Waived RFQ for 1,000 BTC Call Options
Benchmark Benchmark Price (USD) Execution Price (USD) Slippage (bps) Analysis
Arrival Price $5,150.00 $5,155.00 +9.7 bps Positive slippage indicates minor market movement against the order after the decision to trade was made.
Modeled Impact Price (Standard RFQ) $5,185.00 $5,155.00 -57.8 bps Key Finding ▴ The execution achieved a price significantly better than the modeled outcome of a standard RFQ, demonstrating substantial cost savings from avoiding information leakage.
Interval VWAP (5 min) $5,162.50 $5,155.00 -14.5 bps Execution was better than the volume-weighted average price during the execution window, indicating skillful placement.
CLOB Mid-Point at Execution $5,157.00 $5,155.00 -3.9 bps The trade was executed at a price better than the prevailing mid-point, suggesting price improvement was achieved through direct negotiation.

By following this comprehensive playbook, an institutional trading desk can confidently utilize waived RFQ executions. The process transforms a regulatory requirement into a competitive advantage, enabling the firm to navigate the complexities of the crypto derivatives market with precision, discretion, and a demonstrable commitment to best execution.

A vibrant blue digital asset, encircled by a sleek metallic ring representing an RFQ protocol, emerges from a reflective Prime RFQ surface. This visualizes sophisticated market microstructure and high-fidelity execution within an institutional liquidity pool, ensuring optimal price discovery and capital efficiency

References

  • European Securities and Markets Authority. “MiFID II and MiFIR investor protection and intermediaries topics.” ESMA, 2017.
  • Norton Rose Fulbright. “10 things you should know ▴ The MiFID II / MiFIR RTS.” 2015.
  • European Commission. “Commission Delegated Regulation (EU) 2017/587.” Official Journal of the European Union, 2017.
  • Financial Conduct Authority. “Best execution and payment for order flow.” FCA Handbook, COBS 11.2, 2018.
  • Lehalle, Charles-Albert, and Sophie Laruelle. Market Microstructure in Practice. World Scientific Publishing, 2018.
  • O’Hara, Maureen. Market Microstructure Theory. Blackwell Publishers, 1995.
  • BGC Partners. “MiFID II/MiFIR ▴ Transparency & Best Execution requirements in respect of bonds.” 2016.
A sleek, light interface, a Principal's Prime RFQ, overlays a dark, intricate market microstructure. This represents institutional-grade digital asset derivatives trading, showcasing high-fidelity execution via RFQ protocols

Reflection

Sleek, intersecting planes, one teal, converge at a reflective central module. This visualizes an institutional digital asset derivatives Prime RFQ, enabling RFQ price discovery across liquidity pools

System Integrity in an Evolving Regulatory Landscape

The exercise of mapping MiFID II’s rigorous execution standards onto the crypto derivatives market reveals a foundational truth ▴ robust operational architecture is the ultimate competitive advantage. The frameworks for justifying a waived RFQ ▴ the quantitative thresholds, the documentation protocols, the post-trade analytics ▴ are components of a larger system designed to manage complexity and mitigate risk. As the digital asset space matures, the line between unregulated innovation and regulated institutional practice will continue to blur.

The question for market participants is not whether their processes can satisfy today’s interpretation of a traditional finance directive, but whether their entire operational system is built with the integrity and foresight to adapt to the more structured environment that is inevitably coming. Is your execution protocol a series of ad-hoc decisions or a coherent, defensible system?

A teal sphere with gold bands, symbolizing a discrete digital asset derivative block trade, rests on a precision electronic trading platform. This illustrates granular market microstructure and high-fidelity execution within an RFQ protocol, driven by a Prime RFQ intelligence layer

Glossary

A precisely engineered multi-component structure, split to reveal its granular core, symbolizes the complex market microstructure of institutional digital asset derivatives. This visual metaphor represents the unbundling of multi-leg spreads, facilitating transparent price discovery and high-fidelity execution via RFQ protocols within a Principal's operational framework

Information Leakage

Algorithmic strategies mitigate RFQ information leakage by atomizing large orders and dynamically managing dealer interactions to obscure intent.
A transparent sphere on an inclined white plane represents a Digital Asset Derivative within an RFQ framework on a Prime RFQ. A teal liquidity pool and grey dark pool illustrate market microstructure for high-fidelity execution and price discovery, mitigating slippage and latency

Crypto Derivatives

Meaning ▴ Crypto Derivatives are programmable financial instruments whose value is directly contingent upon the price movements of an underlying digital asset, such as a cryptocurrency.
A sleek, multi-segmented sphere embodies a Principal's operational framework for institutional digital asset derivatives. Its transparent 'intelligence layer' signifies high-fidelity execution and price discovery via RFQ protocols

Rfq Execution

Meaning ▴ RFQ Execution refers to the systematic process of requesting price quotes from multiple liquidity providers for a specific financial instrument and then executing a trade against the most favorable received quote.
A textured spherical digital asset, resembling a lunar body with a central glowing aperture, is bisected by two intersecting, planar liquidity streams. This depicts institutional RFQ protocol, optimizing block trade execution, price discovery, and multi-leg options strategies with high-fidelity execution within a Prime RFQ

Best Execution

Meaning ▴ Best Execution is the obligation to obtain the most favorable terms reasonably available for a client's order.
A sophisticated mechanism depicting the high-fidelity execution of institutional digital asset derivatives. It visualizes RFQ protocol efficiency, real-time liquidity aggregation, and atomic settlement within a prime brokerage framework, optimizing market microstructure for multi-leg spreads

Standard Rfq

Meaning ▴ A Standard RFQ, or Request for Quote, represents a fundamental, widely adopted protocol for bilateral price discovery within over-the-counter markets, particularly relevant for illiquid or substantial block trades in institutional digital asset derivatives.
A multi-faceted crystalline structure, featuring sharp angles and translucent blue and clear elements, rests on a metallic base. This embodies Institutional Digital Asset Derivatives and precise RFQ protocols, enabling High-Fidelity Execution

Illiquid Instrument

The instrument-by-instrument approach mandates a granular, bottom-up risk calculation, replacing portfolio-level models with a direct summation of individual position capital charges.
A multi-layered electronic system, centered on a precise circular module, visually embodies an institutional-grade Crypto Derivatives OS. It represents the intricate market microstructure enabling high-fidelity execution via RFQ protocols for digital asset derivatives, driven by an intelligence layer facilitating algorithmic trading and optimal price discovery

Mifid Ii

Meaning ▴ MiFID II, the Markets in Financial Instruments Directive II, constitutes a comprehensive regulatory framework enacted by the European Union to govern financial markets, investment firms, and trading venues.
A precisely balanced transparent sphere, representing an atomic settlement or digital asset derivative, rests on a blue cross-structure symbolizing a robust RFQ protocol or execution management system. This setup is anchored to a textured, curved surface, depicting underlying market microstructure or institutional-grade infrastructure, enabling high-fidelity execution, optimized price discovery, and capital efficiency

Eth Options

Meaning ▴ ETH Options are standardized derivative contracts granting the holder the right, but not the obligation, to buy or sell a specified quantity of Ethereum (ETH) at a predetermined price, known as the strike price, on or before a specific expiration date.
A sleek, multi-layered institutional crypto derivatives platform interface, featuring a transparent intelligence layer for real-time market microstructure analysis. Buttons signify RFQ protocol initiation for block trades, enabling high-fidelity execution and optimal price discovery within a robust Prime RFQ

Crypto Derivatives Market

Crypto derivative clearing atomizes risk via real-time liquidation; traditional clearing mutualizes it via a central counterparty.
A scratched blue sphere, representing market microstructure and liquidity pool for digital asset derivatives, encases a smooth teal sphere, symbolizing a private quotation via RFQ protocol. An institutional-grade structure suggests a Prime RFQ facilitating high-fidelity execution and managing counterparty risk

Justifying Waived

A defensible RFQ protocol requires a documented, data-driven framework justifying its use to mitigate information leakage and secure best execution.
A transparent sphere, representing a granular digital asset derivative or RFQ quote, precisely balances on a proprietary execution rail. This symbolizes high-fidelity execution within complex market microstructure, driven by rapid price discovery from an institutional-grade trading engine, optimizing capital efficiency

Notional Value

A crypto options block trade is defined not by a fixed notional value but by its operational need for off-book, RFQ-based execution.
Sharp, intersecting geometric planes in teal, deep blue, and beige form a precise, pointed leading edge against darkness. This signifies High-Fidelity Execution for Institutional Digital Asset Derivatives, reflecting complex Market Microstructure and Price Discovery

Market Impact

A market maker's confirmation threshold is the core system that translates risk policy into profit by filtering order flow.
A crystalline droplet, representing a block trade or liquidity pool, rests precisely on an advanced Crypto Derivatives OS platform. Its internal shimmering particles signify aggregated order flow and implied volatility data, demonstrating high-fidelity execution and capital efficiency within market microstructure, facilitating private quotation via RFQ protocols

Waived Rfq

Meaning ▴ A Waived RFQ, or Request for Quote, represents a specific transactional mechanism within institutional digital asset derivatives where the standard process of soliciting multiple competitive bids from various liquidity providers is intentionally bypassed.
An intricate, high-precision mechanism symbolizes an Institutional Digital Asset Derivatives RFQ protocol. Its sleek off-white casing protects the core market microstructure, while the teal-edged component signifies high-fidelity execution and optimal price discovery

Central Limit Order Book

Meaning ▴ A Central Limit Order Book is a digital repository that aggregates all outstanding buy and sell orders for a specific financial instrument, organized by price level and time of entry.
A translucent, faceted sphere, representing a digital asset derivative block trade, traverses a precision-engineered track. This signifies high-fidelity execution via an RFQ protocol, optimizing liquidity aggregation, price discovery, and capital efficiency within institutional market microstructure

Execution Quality

Pre-trade analytics differentiate quotes by systematically scoring counterparty reliability and predicting execution quality beyond price.
A pristine teal sphere, symbolizing an optimal RFQ block trade or specific digital asset derivative, rests within a sophisticated institutional execution framework. A black algorithmic routing interface divides this principal's position from a granular grey surface, representing dynamic market microstructure and latent liquidity, ensuring high-fidelity execution

Quantitative Thresholds

The Double Volume Cap is a regulatory protocol that redirects order flow, altering liquidity pathways and influencing market volatility.
Two reflective, disc-like structures, one tilted, one flat, symbolize the Market Microstructure of Digital Asset Derivatives. This metaphor encapsulates RFQ Protocols and High-Fidelity Execution within a Liquidity Pool for Price Discovery, vital for a Principal's Operational Framework ensuring Atomic Settlement

Derivatives Market

Crypto derivative clearing atomizes risk via real-time liquidation; traditional clearing mutualizes it via a central counterparty.
A marbled sphere symbolizes a complex institutional block trade, resting on segmented platforms representing diverse liquidity pools and execution venues. This visualizes sophisticated RFQ protocols, ensuring high-fidelity execution and optimal price discovery within dynamic market microstructure for digital asset derivatives

Order Book

Meaning ▴ An Order Book is a real-time electronic ledger detailing all outstanding buy and sell orders for a specific financial instrument, organized by price level and sorted by time priority within each level.
An abstract composition depicts a glowing green vector slicing through a segmented liquidity pool and principal's block. This visualizes high-fidelity execution and price discovery across market microstructure, optimizing RFQ protocols for institutional digital asset derivatives, minimizing slippage and latency

Transaction Cost Analysis

Meaning ▴ Transaction Cost Analysis (TCA) is the quantitative methodology for assessing the explicit and implicit costs incurred during the execution of financial trades.
A sharp, metallic blue instrument with a precise tip rests on a light surface, suggesting pinpoint price discovery within market microstructure. This visualizes high-fidelity execution of digital asset derivatives, highlighting RFQ protocol efficiency

Btc Options

Meaning ▴ A BTC Option represents a derivative contract granting the holder the right, but not the obligation, to buy or sell a specified amount of Bitcoin at a predetermined price, known as the strike price, on or before a particular expiration date.