GBP Money Markets: Liquidity Holding Amid Turmoil

Why It Matters

The resilience of GBP liquidity despite geopolitical stress supports the BoE’s ability to manage policy without emergency funding and keeps market volatility in check.

Key Takeaways

• Oil price surge lifts GBP money‑market spreads a few basis points.
• 3‑month SONIA OIS‑deposit spread remains tighter than 2025 levels.
• SONIA stays about 2 bp below the BoE Bank Rate.
• Banks’ uptake of BoE repo facilities stayed flat in March.

Pulse Analysis

The Iran‑related oil price spike has reverberated through global short‑term funding markets, and the UK is no exception. Higher energy costs have forced market participants to reprice expectations for future rate moves, nudging the GBP money‑market curve upward. Yet the impact remains contained; unlike many emerging‑market currencies, the pound’s short‑term rates have not exploded, reflecting a broader appetite for risk‑adjusted returns in a world still coping with geopolitical uncertainty.

In the UK, the key metric of liquidity— the spread between SONIA overnight indexed swaps and bank deposits— widened only marginally, staying well below the peaks observed in 2025. SONIA itself trades about two basis points under the Bank of England’s official rate, a sign that banks are not scrambling for extra reserves. Moreover, the BoE’s short‑term repo (STR) and indexed long‑term repo (ILTR) facilities saw stable, unchanged demand throughout March, underscoring that the central bank’s liquidity buffers remain sufficient despite the oil‑driven shock.

Looking ahead, market participants will watch oil price trajectories and any further escalation in the Middle East for signs of added stress. If energy prices stay elevated, the BoE may feel pressure to tighten sooner, but the current liquidity cushion gives policymakers room to maneuver without triggering a funding crunch. Investors should therefore factor in the modest spread widening as a temporary adjustment rather than a structural shift, while keeping an eye on how future geopolitical developments could reshape the GBP money‑market landscape.