Why do government bond yields drift when news is on its way?

Danny Walker, Dong Lou, Gabor Pinter and Semih Üslü

Government bond yields tend to drift higher in the days before monetary policy or data news in the UK. Over the past two decades this tendency – which we label ‘pre-news drift’ – has pushed up on yields by 2 percentage points in total over that period. The drift concentrates in pre-news periods that coincide with the issuance of UK government bonds, which is more common than it used to be. Our analysis shows that dealers and hedge funds are reluctant to buy bonds when news is on its way, which pushes up yields. Pre-news drift could affect the signal monetary policy makers draw from market rates and it could have implications for the optimal timing of bond issuance. There are further details in an associated working paper.

Continue reading →

What caused the LDI crisis?

Gabor Pinter, Emil Siriwardane and Danny Walker

In September 2022 the interest rate on UK gilts rose by over 100 basis points in four days. These unprecedent market movements are generally attributed to two key factors: the 23 September announcement of expansionary fiscal policy – the so-called ‘mini-budget’ – which was then amplified by forced sales by liability-driven investment funds (LDI funds). We estimate that LDI selling accounted for half of the decline in gilt prices during this period, with fiscal policy likely accounting for the other half. Balance sheet segmentation and operational issues slowed capital injections into LDI funds by well-capitalised pension schemes, leading LDI funds to instead sell gilts. Our analysis shows that these frictions were most pronounced for pooled LDI funds. There are further details in an associated working paper.

Continue reading →

Futures under stress: how did gilt futures behave in the LDI crisis?

Joel Mundy and Matt Roberts-Sklar

When markets are volatile, liquidity tends to worsen. This makes it harder to intermediate buyers and sellers. We saw this during the 2022 liability-driven investment (LDI) stress, when the UK government bond (gilt) market exhibited extreme volatility. This illiquidity was also evident in gilt futures, derivatives that support functioning in the cash gilt market. Gilt futures are traded on an electronic orderbook, meaning we can examine liquidity metrics at very high frequency. Looking across a range of liquidity metrics for gilt futures, we find that liquidity was broadly unchanged following the Monetary Policy Committee’s (MPC’s) decision of 22 September 2022. But market functioning deteriorated heavily following the UK Government’s fiscal statement of 23 September and took a long time to recover.

Continue reading →