Why interest rate matters
Rates discount future cash flows and influence bond prices, equity valuations, financing, currencies, savings, and economic activity. One policy rate does not represent every borrower’s cost.
How it is applied
Investors distinguish nominal from real, fixed from floating, spot from forward, policy from market, and simple from compounded rates. Curves and spreads decompose maturity and credit.
Portfolio example
A borrower pays 5% annually on $100,000, implying $5,000 simple annual interest before fees. A floating rate changes when its reference resets.
How to interpret it
A higher rate can reflect tighter policy, greater inflation, longer maturity, or higher credit risk. Context determines whether it signals strength or stress.
Limitations and common misconceptions
Quoted conventions differ and fees alter effective cost. Reinvestment, compounding, optionality, and inflation make stated rates incomplete.
Sources and further reading
- Economics and Investment MarketsCFA Institute