Defining Inside Information Post-Listing: Judging What Is Share-Price Sensitive

The SFC’s enforcement division has publicly stated that assessing whether a piece of information constitutes “inside information” under Part XIVA of the Securities and Futures Ordinance (SFO) remains the single most contested issue in Market Misconduct Tribunal (MMT) proceedings. In the 2024-2025 enforcement cycle alone, the SFC secured sanctions in three separate MMT cases where the core dispute was not the existence of the information, but whether it was sufficiently specific and price-sensitive at the time the director or officer traded. For listed companies in Hong Kong, the burden of this judgment falls not on the regulator, but on the board and the company secretary every time a material development occurs. The HKEX’s Listing Rule 13.09 and the SFO’s statutory disclosure regime create a dual obligation: disclose immediately once inside information comes to the issuer’s knowledge, unless a safe harbour under SFO section 307D applies. The consequence of getting this wrong is not merely a fine; it is a potential criminal conviction carrying imprisonment for up to 10 years. This article provides a practical framework for distinguishing price-sensitive information from ordinary business noise, referencing the SFC’s published enforcement outcomes and the HKEX’s Listing Decision HKEX-LD100-2017.

The Statutory Framework: What Constitutes “Inside Information”

The SFO Definition and Its Three Limbs

Inside information is defined under SFO section 285(1) as specific information about an issuer which is not generally known to the public but which, if generally known, would be likely to materially affect the price of the issuer’s listed securities. This definition contains three cumulative limbs: (i) specificity, (ii) non-publicity, and (iii) price sensitivity. A failure on any one limb means the information does not trigger the disclosure obligation under Listing Rule 13.09(2)(a).

The specificity limb requires the information to relate to a particular matter or set of circumstances, rather than general market sentiment or speculation. In the MMT case of SFC v. Wong Kwok Leung [2023] MMT 2, the tribunal found that a director’s knowledge of an impending board meeting to discuss a potential acquisition was not sufficiently specific because the board had not yet formed a proposal or received a valuation. The information was deemed “aspirational” rather than “specific.”

The non-publicity limb is frequently misunderstood. Information is “generally known” when it has been disseminated through an HKEX announcement, a press release on the issuer’s website, or a filing on the SFC’s Disclosure of Interests system. However, information that is known only to a small group of analysts or industry insiders does not satisfy this limb. The SFC’s Guidelines on Disclosure of Inside Information (June 2012, updated 2024) state that an issuer cannot rely on the fact that information has appeared in a trade journal or an analyst report to conclude it is generally known.

Price Sensitivity: The Objective Test

The price sensitivity limb is the most fact-intensive. The test is objective: would a reasonable investor consider the information important in making an investment decision? This is not a “materiality” threshold in the US sense of a 5% market movement. The SFC has made clear in its Enforcement Bulletin Issue 8 (2024) that even a 1-2% price movement, if demonstrably connected to the information, can establish price sensitivity.

The HKEX’s Listing Decision HKEX-LD100-2017 provides a concrete example. The issuer, a Main Board-listed manufacturer, received a letter from its largest customer stating an intention to reduce orders by 40% over the next six months. The issuer’s CFO argued this was merely a “renegotiation” and not price-sensitive. The HKEX disagreed, noting that the customer represented 55% of the issuer’s revenue in the prior financial year. The exchange required an immediate announcement. The decision confirms that the source and magnitude of the information relative to the issuer’s financial profile are the primary determinants of price sensitivity.

Common Pitfalls: When Boards Get It Wrong

The “Still Subject to Negotiation” Trap

A recurring error is the belief that information is not price-sensitive until a definitive agreement is signed. The SFC’s Market Misconduct Tribunal Report for 2023 cited three cases where directors traded while negotiations were ongoing, arguing that the deal was “not yet certain.” In each case, the MMT held that the existence of negotiations with a specific counterparty for a transaction representing more than 25% of the issuer’s market capitalisation was itself price-sensitive, regardless of the deal’s ultimate outcome.

The correct approach is to assess whether the negotiations have reached a stage where a reasonable investor would want to know they are occurring. The HKEX’s Guidance Letter GL86-16 (May 2016) advises that an issuer should consider announcing the fact of negotiations when the board has authorised a specific proposal and the counterparty has responded in principle. Waiting for a signed SPA is often too late.

The “Ordinary Course” Misclassification

Another common pitfall is classifying a development as “ordinary course of business” to avoid disclosure. Listing Rule 13.09(2)(a) applies to any inside information, regardless of whether it arises from ordinary operations. In SFC v. Li Ka-shing (Asia) Ltd [2019] MMT 1, the tribunal rejected the argument that a sudden 30% drop in monthly sales for three consecutive months was “cyclical fluctuation.” The company’s historical sales data showed that a 30% drop had not occurred in the preceding seven years. The tribunal found the information was price-sensitive and should have been announced immediately.

Boards should maintain a historical baseline of key operational metrics. Any deviation exceeding two standard deviations from the three-year rolling average should trigger a formal inside information assessment, regardless of whether the deviation is framed as “temporary” or “seasonal.”

Practical Assessment Framework for Directors and Company Secretaries

The Four-Question Test

When a director or senior manager becomes aware of a material development, the company secretary should apply the following four-question test, derived from the SFC’s Guidelines on Disclosure of Inside Information (2024 revision):

1. Is the information specific? Does it relate to a particular event, circumstance, or set of facts, or is it merely a general trend or speculation?
2. Is the information generally known? Has it been disseminated through an HKEX announcement or equivalent public channel?
3. Would a reasonable investor consider the information important? Would it alter the total mix of information available to the market?
4. Is there a reasonable likelihood of a material price impact? This is not a precise percentage, but the test is whether the information would be likely to cause a significant change in the price of the securities.

If the answer to questions 1, 3, and 4 is “yes,” and the answer to question 2 is “no,” the issuer must make an immediate announcement under Listing Rule 13.09(2)(a), unless a safe harbour under SFO section 307D applies.

The Safe Harbour: When Can You Delay Disclosure?

SFO section 307D(2) provides a safe harbour from the disclosure obligation if the issuer has taken reasonable precautions to preserve confidentiality and the information remains confidential. The safe harbour is not a blanket permission to delay. It requires the issuer to have a written policy, a restricted list, and physical and electronic controls over the information.

The HKEX’s Listing Decision HKEX-LD100-2017 explicitly states that the safe harbour is unavailable if the issuer has not implemented a formal inside information management policy. As of 2025, the SFC has indicated in its Annual Enforcement Report that it will scrutinise whether an issuer had a policy in place before the information arose, not after. A retrospective policy will not satisfy the safe harbour.

The Role of the Sponsor and Legal Counsel

When to Engage External Advisors

For Main Board IPOs and GEM listings, the sponsor is required under the Code of Conduct for Persons Licensed by or Registered with the SFC (paragraph 17.6) to ensure the issuer has adequate policies and procedures for identifying and disclosing inside information. This obligation continues post-listing through the sponsor’s ongoing compliance role under the Sponsor Regulation (effective 1 October 2013).

In practice, the sponsor should be engaged whenever the four-question test produces a borderline result. The SFC has stated in its Enforcement Bulletin Issue 9 (2025) that it will give weight to a contemporaneous legal opinion that concluded the information was not price-sensitive, provided the opinion was obtained in good faith and based on a reasonable factual inquiry.

Documentation Is the Only Defence

The MMT has repeatedly held that a director’s oral recollection of what they considered at the time is insufficient. In SFC v. Chan Kwok Keung [2024] MMT 1, the tribunal rejected the director’s testimony that he “did not think” the information was price-sensitive because the company had no written record of any assessment. The tribunal held that the absence of documentation was itself evidence that no proper assessment was conducted.

Every issuer should maintain a formal “Inside Information Assessment Form” that records the date, the information received, the person who received it, the application of the four-question test, and the decision reached. This form should be reviewed by the company secretary and, where the decision is not to disclose, by external legal counsel. The form must be retained for at least seven years under the record-keeping requirements of the SFO.

Actionable Takeaways

1. Adopt a written inside information policy before any material development arises — the HKEX and SFC will not accept a policy created after the fact as satisfying the safe harbour under SFO section 307D.
2. Apply the four-question test to every material development, not just transactions — operational deviations exceeding two standard deviations from historical norms are presumptively price-sensitive.
3. Document every assessment decision in a standardised form — the MMT will treat the absence of documentation as evidence that no assessment was conducted.
4. Engage external legal counsel for borderline cases — a contemporaneous legal opinion obtained in good faith provides a defence that retrospective testimony cannot replicate.
5. Treat negotiations as potentially price-sensitive from the moment the board authorises a specific proposal — waiting for a signed agreement is the single most common error in MMT proceedings.