NextFin News - Hedge funds have captured more than half of all electronic trading in UK government bonds, marking a profound shift in the market structure of the £2.3 trillion gilt market. According to data from electronic trading platform Tradeweb reported by Bloomberg, these fast-money investors accounted for 55% of electronic gilt trading volume in the first quarter of 2026, up from less than 40% two years ago. This milestone highlights the growing dominance of leveraged, short-term traders in a market that was historically the quiet domain of long-term domestic pension funds and insurers.
Imogen Bachra, head of UK rates strategy at NatWest Markets, who has historically maintained a cautious stance on gilt market liquidity, argues that this concentration of trading activity among a small group of highly leveraged players could amplify price swings during market stress. Bachra, known for her conservative analysis of UK sovereign debt dynamics, noted in a research report published this week that while hedge funds provide essential liquidity, their capacity to withdraw rapidly during a crisis remains a key vulnerability. This cautious view, however, is not universally shared across the City of London and does not represent a consensus among sell-side strategists.
In contrast, electronic trading executives and some buy-side participants argue that the growing presence of hedge funds has been a stabilizing force. According to a commentary by Tradeweb, the increased participation of non-bank financial intermediaries has helped absorb the massive supply of new debt issued by the UK Debt Management Office. Since the Bank of England began quantitative tightening—unwinding its massive bond-buying portfolio—traditional market makers have struggled to intermediate the volume of gilts on their balance sheets due to post-crisis regulatory capital constraints. Hedge funds, unencumbered by these balance-sheet restrictions, have stepped into the breach.
The surge in hedge fund activity is largely driven by relative-value strategies, including the basis trade, where investors exploit minute price discrepancies between gilt futures and cash bonds. These strategies rely heavily on leverage obtained through the repo market, where gilt-backed borrowing has reached record highs. The Bank of England has been monitoring these leveraged positions closely, mindful of how a sudden spike in margin calls could force hedge funds to unwind their positions rapidly, as occurred during the global market dash-for-cash in March 2020.
The structural shift in gilt trading has accelerated since the liability-driven investment (LDI) crisis of autumn 2022, which forced UK pension funds to liquidate assets and dramatically reduce their leverage. Since then, domestic pension schemes have adopted a more passive, buy-and-hold approach, leaving a liquidity vacuum that hedge funds have eagerly filled. While pension funds once dictated the terms of gilt trading, their share of electronic volume on platforms like Tradeweb has steadily declined, now representing less than a quarter of active daily turnover.
The Bank of England's latest Financial Stability Report indicated that leveraged exposures in the gilt market remain a key area of surveillance, with the central bank actively exploring ways to increase the resilience of market-based finance. For now, the gilt market remains highly dependent on these agile, leveraged actors to keep the wheels of UK sovereign debt trading turning.
Explore more exclusive insights at nextfin.ai.
