UK manufacturers got a fresh cost wake-up call in September, as a key survey showed input prices climbing again even while output growth lost some steam. The latest S&P Global UK Manufacturing Purchasing Managers' Index (PMI) ticked up to 51.9 from 51.7 in August, signaling a modest expansion in factory activity. But beneath that headline number, the details pointed to a renewed squeeze on costs that could have implications for inflation and interest rates.
What the PMI numbers show
The PMI is a widely watched gauge of business conditions in the manufacturing sector. A reading above 50 indicates expansion, while below 50 signals contraction. The September figure of 51.9 suggests the sector is still growing, but the survey's output measure slipped to 51.5 from 52.1 in August, indicating that the pace of production growth has cooled.
The more notable shift was on the price front. Manufacturers reported the broadest rise in input costs since June, meaning the raw materials, energy, and other inputs they buy are getting more expensive again. At the same time, "factory gate" prices—what firms charge their customers—also picked up. S&P Global economist Rob Dobson described this as "a renewed uplift" in cost pressures.
That combination is often referred to as "pipeline inflation." It means that higher costs are working their way through the supply chain and may eventually show up in consumer prices, if manufacturers pass them on. For everyday investors, that's a signal that the battle against inflation may not be over, even as overall price growth has cooled from the double-digit peaks seen in recent years.
Why this matters for interest rates
The Bank of England (BoE) has been wrestling with how to bring inflation down to its 2% target without choking off economic growth. After a series of rate hikes, the central bank has held rates steady in recent meetings, but the latest PMI data has shifted market expectations. Investors are now leaning toward a rate hike at the BoE's November meeting, according to the survey's findings.
Higher interest rates are the BoE's main tool to cool inflation, but they also make borrowing more expensive for businesses and households. For investors, a November hike would mean higher yields on UK government bonds and potentially more pressure on stocks, particularly in rate-sensitive sectors like housing and utilities. It could also strengthen the pound, which affects multinational companies' earnings and the competitiveness of UK exports.
The PMI data also echoes trends seen elsewhere. In Europe, Czech manufacturing growth cooled in September as costs bit, and Poland's factory slump eased but orders kept falling. Meanwhile, Spain's factory sector returned to growth as output improved. These mixed signals suggest that global manufacturing is still navigating a tricky patch of rising costs and uneven demand.
What it means for investors
For investors, the key takeaway is that inflation pressures in the UK are not fully extinguished. If input costs continue to rise, companies may either absorb them, squeezing profit margins, or pass them on to customers, which could reignite consumer price inflation. Both scenarios have implications for stock valuations and bond markets.
Manufacturers with strong pricing power—those that can raise prices without losing customers—may be better positioned to protect their margins. On the other hand, companies in competitive industries might struggle to pass on higher costs, which could weigh on their earnings. Investors should watch upcoming earnings reports and guidance from UK-listed manufacturers for clues on how they're managing cost pressures.
The possibility of a November rate hike also means that interest-rate-sensitive investments, such as real estate investment trusts (REITs) and high-dividend stocks, could face headwinds. Conversely, banks and financial institutions often benefit from higher interest rates, as they can earn more on lending.
For those with cash savings, a rate hike could mean slightly better returns on savings accounts and bonds. But it also means higher borrowing costs for mortgages and loans, which can affect consumer spending and, in turn, the broader economy.
The PMI data is just one piece of the puzzle. The BoE will also consider inflation readings, wage growth, and services sector data before making its November decision. Still, the renewed cost pressures in manufacturing are a reminder that the path back to stable prices is rarely a straight line.
As always, investors should focus on their long-term goals and diversify across asset classes to weather potential volatility. The manufacturing sector's cost wake-up call is a signal to stay alert, not a reason to panic.
