In May 2024, the SFC criminally charged Segantii Capital Management, its founder Simon Sadler and trader Daniel La Rocca with insider dealing — the most prominent institutional prosecution in the Commission's history. The allegations centre on wall-crossed block trades. Seven years of investigation, and the fund collapsed on redemptions before a single day of trial. All defendants deny the charges; they are presumed innocent.
1. The structural contradiction of wall-crossing
When an investment bank places a large block, it "wall-crosses" prospective buyers — telling them material non-public information (what's being sold, size, timing) so they can commit. Convention says: once you hear it, you don't trade on it. But the legal edge is genuinely unclear:
- Is wall-crossed information "relevant information" under ss.270/291 the moment it's conveyed — or only once a deal is agreed?
- Does a trader who "sounds interested, then positions" breach the rule — or is pre-positioning the rational response the market expects?
- How much "cleansing" does a recipient owe before trading again?
The market ran on convention; the prosecution will test whether convention survives contact with Part XIII/XIV.
2. Why this case matters beyond Segantii
- Every block desk in Asia is watching: the verdict will define what a fund may lawfully do between hearing a wall-cross and trading — a question no Asian court has fully answered.
- Collapse before verdict: redemptions halved the fund on the charge alone — the regulatory sanction landed years before any conviction, raising proportionality questions about announcing charges.
- The hedge-fund licensing asymmetry: buy-side funds take wall-crosses daily; the case forces the entire industry to re-document who heard what and when they traded.
RegSir's take
Whatever the verdict, the case has already rewritten block-trade hygiene: record who was crossed, when, and what was traded afterwards — the audit trail is now the defence. Institutionally, it reveals an uncomfortable truth: the market's "hear it and sit still" convention was never codified, and a decade of practice is being retroactively judged against ss.270/291's broad text. If the SFC wins, expect a wave of wall-cross procedure reforms; if it loses, expect legislative attention — either way, the ambiguity gets resolved at someone's expense. And it is a reminder that a criminal charge is itself a sanction — Segantii is half gone regardless of outcome.
3. Compliance takeaways
- Wall-cross registers: log every crossing — time, information given, trading restrictions imposed, and post-cross activity.
- "Cleansing" protocol: define when a crossed fund may trade again (public disclosure of the event; expiry of the MNPI's market sensitivity).
- PA dealing supervision: portfolio managers' post-crossing trades should face heightened review — Segantii shows the enforcement lens is now on buy-side.
4. Official sources & reporting
| Document / report | Link |
|---|---|
| SFC press release — charges against Segantii (2024.05) | sfc.hk ↗ |
| SFO ss.270/291 — insider dealing offences | elegislation.gov.hk ↗ |
| HK Judiciary — District Court criminal listing (public schedule) | judiciary.hk ↗ |