What are trough interest rates?
In economics, a “trough” is the lowest point in a business or economic cycle, following a decline and before a recovery. Trough interest rates occur when central banks have reduced rates to their lowest levels, often in response to economic downturns or recessions. The aim is usually to stimulate borrowing, investment and spending to help the economy recover.
Developed market rates
In all the major advanced economies, the scope for cutting interest rates in 2026 is limited. Policy rates are already close to what is considered the “neutral” rate – the level that neither stimulates nor restrains economic growth (Figure 2). Therefore, interest rates are likely to reach their lowest point (the “trough”) in the first half of 2026, after which further cuts are unlikely.
The Bank of Japan is expected to struggle to raise rates – at least until the middle of 2026. In Switzerland, rates are already at zero and Swiss National Bank President Schlegel has signalled the bar for reintroducing negative interest rates is higher than in the past. In the eurozone, interest rates are already close to neutral. The scope for UK rate cuts will be constrained by relatively sticky, above-target inflation, notably in the services sector. In the US, the range of estimated neutral rates remains hotly disputed but we doubt the Federal Reserve will reduce rates much below 3%, given strong real growth and inflation which is still sticky.
For those with memories of interest rates being at or close to zero in the recent past, such expectations will be disappointing. Very low interest rates would only make sense in the event of either a crisis situation, which hopefully is avoided in 2026, or one in which growth and the labour market are persistently weak, which we do not expect. On balance, we welcome the move to such neutral/trough rates as an indication that financial markets are behaving in a rational manner.