An interest rate is the price of borrowing or reward for lending over time, expressed under a stated convention. Different rates reflect term, currency, credit, liquidity and policy.
3 minute readReviewed 16 August 2026Beginner level
Make it click
The rental price of money
Borrowing a tool has a rental cost that depends on how long it is used and whether it will be returned safely. Money has similar time and reliability dimensions.
Now put that into markets
Here is the idea in its proper setting
Central-bank policy rates influence, but do not equal, mortgage, deposit, bond and company borrowing rates. Markets form curves for different maturities.
01
How it works
Nominal rates include expected inflation and real compensation. Fixed and floating contracts transmit rate changes on different schedules.
02
How to read it carefully
Name benchmark, term, compounding, currency and credit quality. Compare annual percentage conventions carefully.
Go deeperThe important limit+
03
The important limit
A rate cut can accompany economic weakness and need not lift every asset. Borrowers and savers experience transmission differently.
Takeaway
The useful version
There is no single interest rate: always name borrower, term, currency and convention.