Forward Rate

What Is a Forward Rate?

A forward rate is an interest rate or exchange rate agreed today for a transaction that will take place at some point in the future. It describes the cost of borrowing or the price of a currency for a period that has not started yet. Forward rates are often derived from today's spot rates for different maturities, which is why they reveal what the market currently expects future rates to be.

How It Works

Suppose the one-year spot rate is 4% and the two-year spot rate is 5%. Those two rates imply a rate for the second year alone. Using annual compounding, the implied one-year forward rate that starts in one year is:

(1 + two-year rate)² ÷ (1 + one-year rate) − 1

With the example above, this gives (1.05)² ÷ 1.04 − 1, which is about 6.0%. Money invested for two years at 5% should grow about the same as money invested for one year at 4% and then reinvested for another year at roughly 6%. If it did not, traders could profit by borrowing at one rate and lending at the other, a practice known as arbitrage. That activity tends to push the rates back into line.

Forward rates are usually built from the yield curve, which plots yields across different maturities. Analysts use them to estimate market expectations. However, a forward rate is not a forecast by itself, because it also reflects compensation for risk and liquidity.

Forward Rates in Practice

Forward rates appear in several kinds of agreements. A forward rate agreement (FRA) locks in an interest rate for a future loan or deposit. Currency forwards work similarly, with two parties agreeing on an exchange rate for a future date. Currency forward rates are shaped largely by the difference between interest rates in the two countries.

Why It Matters to Investors

For individual investors, forward rates offer a way to read the market's view of where interest rates may head. They also affect bond pricing and the cost of hedging currency risk. Because they are derived from current prices rather than predictions, they are best understood as a snapshot of market pricing, not a guarantee of what will happen.