UK Short Selling Rules Revoked From 13 July 2026

If you opened the Treasury’s latest statutory instrument on legislation.gov.uk and felt your eyes glaze over, you would not be alone. The formal title is the Financial Services and Markets Act 2023 (Commencement No. 14) Regulations 2026, and the key date is 13 July 2026. On that day, part of the Financial Services and Markets Act 2023 will be switched on so that a set of older short selling laws is revoked. That sounds dry, but it tells us something important about how UK financial law now changes. Big Acts of Parliament often do not start all at once. Instead, ministers bring different bits into force later, using separate statutory instruments like this one. In this case, HM Treasury made the regulations on 3 June 2026, and two Lords Commissioners of His Majesty’s Treasury, Taiwo Owatemi and Christian Wakeford, signed them the same day.

The phrase commencement regulations is the first piece of legal jargon worth slowing down for. A commencement regulation does not usually create a whole new policy by itself. Its job is to say when an existing Act starts to operate. You can think of it as the legal equivalent of setting a start date on a device that has already been built. Here, the Treasury is bringing into force section 1(1) of the Financial Services and Markets Act 2023, but only so far as it relates to a specific cluster of short selling measures listed in Schedule 1 to that Act. That narrow wording matters. It means this instrument is targeted. It is not activating every part of section 1, and it is not rewriting the whole financial rulebook in one go.

The next phrase that needs translating is assimilated law. After Brexit, many EU rules that already applied in the UK did not simply vanish. They were kept in domestic law so that the legal system would still function. In this newer stage of the clean-up, some of those inherited rules are being removed or replaced, and the law refers to them as assimilated law. So when this regulation says it revokes assimilated law relating to financial services and markets, it means the UK is taking specific EU-era rules out of the statute book. That does not mean short selling itself disappears, and it does not mean every safeguard in financial markets suddenly falls away. What it does mean is that the old legal instruments named in the Act are being switched off from the date set by the Treasury.

Short selling is one of those terms that often sounds more mysterious than it is. In simple terms, it usually involves an investor betting that the price of a share will fall. They borrow the share, sell it, and hope to buy it back later at a lower price before returning it. If the price drops, they may profit. If it rises, they may lose money. That is why short selling has long attracted close regulation. Authorities worry about transparency, market stress and whether trades can actually be settled properly. The revoked rules also touch certain aspects of credit default swaps, which are contracts linked to the risk of a borrower defaulting. You do not need to be a trader to see why governments keep a careful eye on these areas: they sit close to confidence, panic and trust in markets.

The regulations are precise about what is being revoked on 13 July 2026. The biggest item is Regulation (EU) No 236/2012, often called the EU Short Selling Regulation 2012. Also going are the Financial Services and Markets Act 2000 (Short Selling) Regulations 2012, four related European Commission measures from 2012, and two later UK instruments on notification thresholds from 2021 and 2023. Those four Commission measures are Delegated Regulation 826/2012, Implementing Regulation 827/2012, Delegated Regulation 918/2012 and Delegated Regulation 919/2012. Their titles are long, but the subjects are quite concrete: when net short positions must be notified, when they must be publicly disclosed, how certain calculations are done, and how some settlement and threshold rules work. The Short Selling (Notification Thresholds) Regulations 2021 and the Short Selling (Notification Threshold) Regulations 2023 are revoked too.

What makes this worth reading is not drama, but legal plumbing. This statutory instrument does not set out a fresh replacement regime line by line. It brings revocation into force for the listed measures. So if you are trying to understand what firms must do after 13 July 2026, this document gives you only part of the picture. It tells you which old instruments are ending; it does not, by itself, teach you every rule that follows. **What this means:** when you read a commencement regulation, you should not assume it is the whole story. It is often one move in a longer legislative sequence. For students of politics, law or business, that is a useful lesson in itself. Public policy is often changed in stages, with one instrument activating another.

The explanatory note adds one more clue about how the Treasury sees this change. It says no full impact assessment has been produced for this instrument because no, or no significant, impact on the private, voluntary or public sector is foreseen. That does not mean the measure is meaningless. It means the government presents this particular step as a technical implementation of a wider framework rather than a major new market shock. The note also says a fuller impact assessment was published for the Financial Services and Markets Act 2023 itself. That is another good reminder for readers: the most important explanation is not always attached to the shortest legal text in front of you. Sometimes the small statutory instrument makes sense only when you place it next to the larger Act behind it.

There is also a quiet civics lesson in the way the revoked laws are grouped. The Act refers to assimilated direct principal legislation, subordinate legislation and EU tertiary legislation. In plain English, that is the law working at different levels: the main rule, supporting regulations under it, and more detailed technical measures beneath those. When ministers revoke a regime properly, they often have to deal with every layer rather than just the headline law. So the real takeaway is simple. From 13 July 2026, the UK will revoke a package of inherited short selling rules named in the Financial Services and Markets Act 2023, and this is the legal instrument that sets that date. If you are new to financial regulation, this is a useful example of how law changes after Brexit: not through one grand announcement, but through tightly written steps that only make sense once we translate them into ordinary English.