Mortgage borrowers brace for more volatility as rates turn higher

A renewed wave of mortgage rate increases has erased the reductions seen earlier in the summer, adding to uncertainty for UK borrowers as lenders respond to volatile financial markets.

The average rate on a new mortgage rose to 5.59 per cent at the beginning of August, up 0.12 percentage points from the start of July, according to Moneyfacts. The increase returned average borrowing costs to their level at the beginning of June.

The figures underline the sensitivity of mortgage pricing to wholesale market movements. Lenders typically adjust fixed-rate products in response to changes in swap rates, which reflect expectations for future interest rates.

Rachel Springall, finance expert at Moneyfacts, said continuing uncertainty over the outlook for interest rates, compounded by conflict in the Middle East, had contributed to volatility in swap markets.

The speed with which lenders have changed their pricing has also shortened the lifespan of mortgage products. The average deal remained available for only 11 days at the beginning of August, down from 14 days a month earlier and the shortest period since April.

In April, amid severe mortgage market volatility, products remained on sale for an average of just eight days.

The rapid turnover means borrowers and brokers face a moving target, with attractive rates potentially withdrawn before applications can be completed.

Yet the market is not suffering from a shortage of choice. Moneyfacts recorded 7,357 mortgage products at the beginning of August, up from 7,177 in July and marking a fourth consecutive monthly increase in availability.

That combination — more products but shorter shelf lives and higher average rates — highlights the increasingly competitive but volatile nature of the mortgage market.

Springall said lenders had moved swiftly to reprice their ranges as market conditions changed, pushing the average shelf life down sharply.

For borrowers, the immediate picture is therefore mixed. Greater product availability offers more scope to shop around, but higher average rates mean the cost of securing a new mortgage has risen again.

The direction of wholesale borrowing costs will remain crucial. If swap rates continue to fluctuate, lenders may face further pressure to adjust pricing, keeping mortgage borrowers exposed to market movements even as the wider supply of products expands.