Bonds and swaps A spot rate is the
interest rate for a specific maturity, which is to be used for
discounting the cash flows which occur at that date. An alternate statement of this: the rate of effective annual growth that equates the
present value with the
future value. The terminology is consistent with the above, in that the spot rate is related to the
forward rate analogously. A spot rate
curve displays these rates over various maturities. Each security class will have its own curve (with the resultant
credit spread – e.g. swaps vs government bonds – a function of increased
credit risk). A
zero rate curve or zero curve is the term structure of the
yields-to-maturity of
Zero-coupon bonds and maturities. Note that a spot rate curve is
not a curve of
bond ytm or
swap rates – which in fact are curves of currently trading
prices of securities with various maturities (these would be:
yield curve, swap curve, cash curve or coupon curve). Spot rates cannot be directly observed, prices can: spot rates are thus estimated from these prices via the
bootstrapping method, and the result is the spot rate curve for the securities in question.
Currency Commodity A simple example: even if you know tomatoes are cheap in July and will be expensive in January, you cannot buy them in July and take delivery in January, since they will spoil before you can take advantage of January's high prices. The July price will reflect tomato supply and demand in July. The forward price for January will reflect the market's expectations of supply and demand in January. July tomatoes are effectively a different commodity from January tomatoes (contrast
contango and
backwardation). == See also ==