The FTSE 250 index suffered its most severe single-day decline since March on Tuesday, closing at 24,521.29 after a 1.67% slide. The 417.51-point drop more than erased the previous week's gains, wiping out 189% of the 221.30-point advance recorded between August 24 and August 28. This reversal underscores the vulnerability of UK midcap stocks to shifts in interest rate expectations and domestic economic data.
The sell-off was driven by a combination of factors, including a spike in global oil prices and a notable rise in UK government bond yields. Brent crude climbed past $92 per barrel following new U.S.-Iran strikes, while yields on 10-year gilts reached their highest level since 2008. These developments prompted investors to reassess the path of monetary policy, with markets now pricing in at least 31 basis points of Bank of England rate hikes by the end of the year, up from roughly 24 basis points a week earlier, according to LSEG data.
The rate-sensitive nature of midcap stocks was highlighted by the sector's underperformance relative to the FTSE 100. The FTSE 250 fell 1.35 percentage points more than the blue-chip index, which declined just 0.32%. This disparity reflects the heavier weighting of domestic sectors in the midcap index, with financials accounting for 47.09% of the FTSE 250 in May, while consumer discretionary and real estate together contributed an additional 19.08%, according to FTSE Russell.
Weak Housing Data Adds Pressure
Adding to the bearish sentiment, the Bank of England reported that mortgage approvals for house purchases fell to 56,100 in July, the lowest level since January 2024. This figure came in below all economist estimates in a Reuters poll, signaling a cooling housing market. Net mortgage borrowing also declined sharply, dropping 44.2% to £4.3 billion from June's £7.7 billion, while the effective interest rate on new mortgages rose by 10 basis points to 4.45%.
Ruth Gregory, an economist at Capital Economics, noted that the “near-term outlook for the housing market is weak,” reflecting the impact of higher borrowing costs on household demand. Consumer borrowing, however, exceeded expectations, providing a mixed picture of the UK economy.
Business Lending Costs Climb
The cost of capital for UK businesses also rose, with the effective rate on new bank loans for firms reaching 5.62% in July. For small and medium-sized enterprises, the rate climbed to 6.61%, according to Bank of England data. These higher borrowing costs are likely to weigh on corporate investment and could further dampen economic growth.
Market Outlook and Key Data
Investors are now looking ahead to the release of July GDP data on September 11, which will provide further clues about the health of the UK economy. June saw GDP expand by 0.3% month-on-month, and the second quarter recorded a 0.4% increase. A weaker-than-expected July figure could reinforce the case for a more cautious outlook on midcap equities.
However, there are potential mitigating factors. A decline in oil prices could quickly reverse the yield shock, while stronger-than-expected production data might help rate-sensitive stocks recover. Conversely, an escalation of geopolitical tensions would exacerbate the current risks.
For investors, the key metric to monitor is whether gilt yields remain elevated enough to constrain UK credit availability. The FTSE 250's recent volatility highlights the delicate balance between domestic economic data, global commodity prices, and central bank policy expectations.
