Par Value vs. Market Value of a Bond: What's the Difference?
A bond has two prices that matter, and confusing them is one of the most common mix-ups for people new to fixed income investing. One is fixed for life; the other changes by the day.
The short answer
Par value, also called face value, is the fixed amount a bond’s issuer agrees to repay at maturity, and it never changes over the bond’s life. Market value is the price the bond actually trades for before maturity, and it fluctuates based on interest rates, credit conditions, and demand. The two are often different except right around maturity.
Why par value stays fixed
Par value is set when a bond is first issued and represents the amount the issuer promises to return to the bondholder when the bond matures, assuming the issuer meets its obligations. It’s also the base figure used to calculate the bond’s fixed coupon payments — a bond’s coupon rate is expressed as a percentage of par value. Because par value is a contractual figure baked into the bond’s terms, it stays constant regardless of what happens in the broader market between issuance and maturity.
Why market value moves
Market value is simply what the bond can be bought or sold for at a given moment, and that price responds to a range of shifting factors. When broader interest rates change, existing bonds with fixed coupon payments become more or less attractive relative to newly issued bonds, which pushes market value above or below par — the dynamic behind bond premium versus bond discount pricing. Perceived changes in the issuer’s ability to repay also move market value, often reflected in a shifting credit spread. General supply and demand in the bond market plays a role too.
How the two converge over time
As a bond approaches its maturity date, its market value tends to drift closer to its par value, regardless of whether it had been trading at a premium or a discount. This happens because there’s less and less time remaining for market conditions to diverge meaningfully from the fixed repayment amount coming due. At maturity itself, assuming no default, the bond is redeemed at exactly par value.
Where this distinction shows up
- Reading a bond quote. A quoted price is typically expressed as a percentage of par value, so understanding par value is necessary just to interpret what a quoted price actually means in dollar terms.
- Understanding total return. An investor’s actual gain or loss depends on the market value paid at purchase versus what’s received at sale or maturity, not simply on par value alone.
- Comparing bonds. Two bonds with the same par value can have very different market values depending on their coupon rate, time to maturity, and the issuer’s credit standing.
The bottom line
Par value is the fixed destination a bond is contractually built to reach at maturity. Market value is the moving price of getting there, shaped by everything happening in the market along the way. Keeping the two separate in mind makes it much easier to understand why a bond’s price can look completely different from its face value at any given point before it matures.