Recommendation 3

The Treasury and the DMO lack the information needed to better identify unlawful activity and understand the risks posed by overseas investors, potentially reducing the value for money from future gilt sales. In May 2023, the Competition and Markets Authority (CMA) provisionally found that, between 2009 and 2013, five major banks unlawfully shared competitively sensitive information, potentially impacting the DMO’s gilt auctions. Collusion is illegal and while it is not the DMO’s responsibility to police the behaviours of auction participants, it needs to put measures in place so it can monitor and minimise harmful behaviour, including the collection of information that could help unearth unlawful activity in a timely manner. The current measures, such as blind bids, might not be sufficient given the alleged unlawful activity took place nearly 15 years ago and was not identified at the time, with the DMO apparently unaware some of its auctions may have been manipulated. Similarly, the Treasury and the DMO hold limited information on the ultimate owners of UK debt held by overseas investors, which makes up around 25% of UK debt – the second highest in the G7. There is a lack of consensus on the potential risk this creates. For example, the Office for Budget Responsibility (OBR) see overseas holders of UK gilts as more sensitive to market movements compared to domestic investors as they prioritise higher returns over longer-term investments. Meanwhile, the DMO considers foreign investors to be an important part of its diverse investor base. Recommendation 3A: The Treasury, together with the DMO, should write to us, within two months of the conclusion of the CMA’s investigation, outlining what steps they will take to address the information gaps around identifying potentially unlawful activity, including: • The changes the Treasury will make to its gilt selling process in response to the CMA’s investigation; • Undertaking a formal review of the DMO’s gilt selling proce