Why Can Loan Rates or Bond Yields Rise After a Policy Rate Cut?
Understand the difference between central bank policy rates and market rates. Interpret rate news through future policy expectations, credit spreads, and loan repricing schedules.
A policy rate is a central bank tool, while market rates are prices shaped by maturity, credit, liquidity, and expectations for future policy. Even after a policy rate cut, some market rates can rise if the decision was already expected or credit risk increases. To understand the movements, first specify which rate and maturity you are comparing.
Policy decisions are the starting point for the rate structure
The Bank of Korea Base Rate is the policy rate serving as a reference for transactions between the central bank and financial institutions, influencing the real economy through short-term financial markets. In the United States, the target range for the federal funds rate plays a central role in policy implementation. The systems differ in name and operation, but neither directly sets the rate on every loan. Treating the rate in a policy statement, an actual traded short-term rate, and a bank's customer lending rate as the same number obscures differences in transmission.
Markets price in decisions ahead of time
Long-term bonds price in a range of possible policy changes through maturity. If a cut is widely expected, long-term yields may decline before the decision. After the actual cut, they may rebound if the likelihood of further cuts is judged to have diminished. Government and corporate bonds also do not carry the same credit risk. Even if a benchmark rate declines, corporate credit spreads can widen when more investors question companies' ability to repay. Examine maturity-specific movements and credit spreads alongside the news of a rate cut.
Actual interest costs depend on contractual repricing
Even floating-rate loans do not all immediately switch to a new rate when policy is announced. Check the contractual reference rate, repricing frequency, and spread terms. Fixed-rate borrowing costs may stay unchanged until new financing or refinancing. In company analysis, it is useful to record how much debt will reprice in the next period before forecasting a decline in the average borrowing rate. Changes in bank funding costs and borrower risk can produce different rates for different borrowers under the same policy rate environment.
Worked example
Hypothetical example: Suppose a loan charges 4.5%, comprising a 3.0% reference rate and a 1.5% spread. At repricing, the reference rate falls to 2.7% but the spread rises to 2.0%, making the final rate 4.7%. With KRW 100 million of principal outstanding for a full year and simple interest, interest costs increase from KRW 4.5 million to KRW 4.7 million, a rise of KRW 200,000. Check the actual contract to determine whether the spread can change.
What to check
- Specify the maturity of the rate being compared with the policy rate.
- Check whether the cut was already priced into market expectations.
- Examine government bond yields separately from corporate credit spreads.
- Check the loan's reference benchmark and repricing frequency in the contract.
Sources and primary materials
This is educational material about research methods. For an actual company decision, verify the filings and primary sources for the relevant period.