Premium Bond

What Is a Premium Bond?

A premium bond is a bond trading above its par (face) value. A $1,000 par bond priced at $1,060 trades at a 6% premium, or "106" in bond market quoting convention. Premium bonds typically carry coupon rates higher than current market yields, making their above-market income stream valuable enough to justify paying more than face value.

At maturity, the bondholder receives only the par value, so the premium erodes over the bond's remaining life. This "pull to par" means that premium bonds experience a predictable capital loss component, which is offset by their higher-than-market coupon payments.

Why It Matters for Markets

Premium bonds play an important role in portfolio construction, particularly for income-oriented investors. Their higher coupons provide greater current cash flow, which can be essential for retirees, endowments, and other investors who spend their bond income rather than reinvest it.

In the secondary bond market, many actively traded bonds are premium bonds because they were issued when rates were higher. Understanding premium bond dynamics is essential for accurate portfolio valuation and risk management. A portfolio full of premium bonds will experience price depreciation toward par even in a stable rate environment, which must be factored into performance expectations.

Premium bonds also have a notable relationship with callable bonds. Issuers are incentivized to call high-coupon bonds when they can refinance at lower rates. A premium bond that is callable faces a higher probability of early redemption, making yield-to-call and yield-to-worst critical metrics.

Amortization and Total Return

The premium paid above par is amortized over the bond's remaining life using either a straight-line or constant-yield method. Under the constant-yield method, each period's amortization is calculated so that the yield on the amortized cost basis remains constant. This accounting treatment ensures that the reported yield accurately reflects the economic return.

For total return analysis, premium bonds can outperform discount bonds in certain scenarios, particularly in stable or rising rate environments. The higher coupon provides more cash to reinvest at prevailing rates, while the price decline from premium to par is already built into the yield calculation. The key is comparing yield to maturity (or yield to worst for callable bonds) rather than just looking at the coupon rate or current yield in isolation.