REGULATORY CORRECTION OF ARTIFICIAL PRICE SIGNALS

1. Introduction

Artificial price signals arise where electricity-market prices no longer reflect genuine conditions of supply, demand, scarcity or network constraints because market information, bidding behaviour or operational data has been distorted. Artificial signals may result from market manipulation, strategic withholding, false availability data, misleading bids, inaccurate physical notifications or delayed disclosure of important information.

Regulatory correction seeks both to stop the conduct creating the distortion and to restore confidence that wholesale prices emerge from legitimate competitive interaction. In Great Britain, Ofgem enforces rules against market manipulation and insider trading under the wholesale energy-market integrity framework.

2. Sources of Artificial Price Signals

Electricity prices can be distorted in several ways. A generator may falsely represent that capacity is unavailable, exaggerate technical operating limitations or deliberately submit information designed to make the system operator believe additional balancing energy is required.

Artificial signals can also arise from withholding inside information. If traders incorrectly believe that substantial generation is unavailable, wholesale prices may increase even though actual future supply is greater.

Accordingly, regulation must protect not merely the final market price but also the information architecture through which prices are formed.

3. Regulatory Correction Mechanisms

Regulators can respond through:

investigation and financial penalties;

correction of inaccurate market information;

orders or undertakings requiring behavioural changes;

repayment or redress where manipulation generated improper revenues;

strengthened reporting and surveillance;

licence enforcement;

reform of balancing and settlement rules; and

publication requirements concerning generation availability.

The regulatory objective is to ensure that prices reflect a fair interaction between genuine supply and demand, rather than strategically manufactured scarcity. Ofgem expressly identifies this as a core purpose of its REMIT enforcement.

4. Case: InterGen Market Manipulation

Case Name/Citation

Ofgem Final Notice concerning InterGen (UK) Ltd and associated generating companies, 15 April 2020.

Facts

InterGen submitted misleading Physical Notifications indicating that generating units would not operate during high-demand periods. It also provided misleading Stable Export Limits concerning the minimum output levels of certain plants. Ofgem found that the information induced the Electricity System Operator to purchase balancing services that generated additional revenues for InterGen.

Legal Issue

Whether deliberately misleading operational information constituted prohibited manipulation of the wholesale electricity market.

Judgment/Decision

Ofgem found breaches of Article 5 REMIT and Grid Code-related licence obligations. A £35 million penalty was reduced to £24.5 million for early settlement, and InterGen agreed to return approximately £12.79 million to affected parties.

Legal Principle/Ratio

Operational information that gives false or misleading signals concerning electricity supply, demand or price can constitute market manipulation.

Significance

The case demonstrates direct regulatory correction of an artificial scarcity signal. Regulators can address both the distorted information and the financial gains resulting from it.

5. Case: Engie Global Markets

Case Name/Citation

Ofgem Final Notice concerning Engie Global Markets, 5 September 2019.

Facts

A trader acting for Engie entered orders and transactions in the wholesale gas market that gave, or were likely to give, false or misleading signals concerning supply, demand or price and were capable of securing prices at an artificial level.

Legal Issue

Whether trading behaviour designed to influence market perceptions violated the prohibition on market manipulation.

Judgment/Decision

Ofgem found a breach of Article 5 REMIT and imposed a financial penalty, reduced after early settlement to approximately £2.13 million.

Legal Principle/Ratio

A price need not result from genuine competitive forces where transactions themselves are structured to create misleading market signals.

Significance

Although involving gas, the principle applies directly to wholesale electricity markets because REMIT protects both sectors against artificial pricing.

6. Case: SSE Generation and Inside Information

Case Name/Citation

Ofgem Final Notice concerning SSE Generation Ltd, 24 August 2020.

Facts

SSE failed to publish information concerning future generation availability promptly. Market participants therefore traded for several working days without knowing that more generation was likely to become available. Ofgem considered that this could materially affect wholesale electricity prices.

Legal Issue

Whether delayed disclosure of price-sensitive generation information breached REMIT.

Judgment/Decision

Ofgem found an Article 4 breach and imposed a penalty ultimately reduced to £2.06 million.

Legal Principle/Ratio

Effective price formation requires the timely publication of inside information capable of significantly affecting wholesale prices.

Significance

Artificial signals can arise from missing information as well as false information.

7. Current Regulatory Development

Ofgem reiterated in April 2026 that market participants must publish inside information effectively and promptly. It warned that rigid numerical thresholds can be inadequate because several smaller outages may collectively have substantial market effects.

This illustrates a movement toward context-sensitive market surveillance, rather than mechanical compliance.

8. Conclusion

Regulatory correction of artificial price signals is fundamental to electricity-market integrity. False physical notifications, misleading technical parameters, strategic trading and delayed disclosure can cause prices to depart from genuine system conditions. Effective regulation therefore combines REMIT enforcement, licence obligations, accurate operational reporting, transparency, financial penalties and redress. The InterGen, Engie and SSE decisions demonstrate that electricity-price regulation protects not merely prices themselves but the reliability of the information and conduct through which market prices are formed.