As someone who has been seated across the table from investors, explaining concepts that on the surface appear to defy logic often inspires the most rewarding conversations. In many instances, portfolio presentations involving premium-priced municipal bonds encounter the same question from clients and prospects: "Why should I pay more than the face value on a bond that will only pay par at maturity?"
The appropriate response should highlight the availability of maximum tax-free income and cash flow normally provided by these securities and should dispel any notion that "par" is always the "right price." Simply put, premium prices on bonds buy higher future income and can actually represent a cheaper buy.
Admittedly, the premium bond discussion takes on a retail focus as the more savvy institutional investors understand the key to unlocking the benefits of buying premium bonds can be found in cash flow analysis tied to the stream of coupon income.
While my intent is to describe the benefits and purpose of using premium bonds in a portfolio, it is important to understand that couponing decisions are based on a variety of factors. While premium bonds can match the needs of a long-term investment strategy, other types of coupons such as discounts — even zero coupon bonds — can make sense given different types of investment strategies, existing market technicals, curve positioning and interest rate and reinvestment expectations. Benchmarking to a particular index also makes couponing very important.
In my opinion, all kinds of coupons serve a purpose in an investment portfolio. Lower coupon discount bonds tend to be more exposed to duration sensitivity, but these bonds can be acquired at reduced price points and lower coupon discounts tend to perform better with price appreciation rather than with cash flow and typically offer a higher yield to maturity.
Times of unusual market cheapness could create opportunities for acquiring discounts with greater total return potential, and this becomes more apparent during periods of declining interest rates. Buying discounts, however, requires consideration of the De Minimis Rule given potential exposure to a higher ordinary income tax liability. Deeply discounted bonds could also be less liquid.
For the typical SMA portfolio manager, it can be difficult to employ active tactical trading across all accounts given associated friction costs and potential tax implications for clients. This supports my case for an appropriate blend of coupons. Zero coupons are appropriate for those investors willing to forgo current income and take on duration risk, having a future cash need and perhaps maintaining that rates will fall appreciably.
A bond's fixed coupon remains static, but yield often changes. It is unlikely that a bond purchased at 4% will retain a 4% market yield throughout its life. As market rates change, prices on fixed income securities also change. Consider some basic relationships: (1) a bond priced at par will yield the coupon rate; (2) a bond priced above par (premium) will yield a rate below the coupon rate; (3) a bond priced below par (discount) will yield a rate above the coupon rate.
A premium bond trades at a premium price in the market because its stated interest rate is greater than currently available market rates, with amortization of the premium calculated to par over the life of the bond. The premium is returned to the investor over the life of the bond through these above market cash flows.
Essentially, the higher cash flow — and the flexibility to apply this cash flow to future market investments — underlies the basic logic for buying premium bonds. Therefore, maximization of current tax-free income compensates for a higher purchase price. Depending upon the size of the premium, there may be a yield concession offered to make the purchase attractive relative to par bonds.
Today's unsettled muni interest rate environment, with perhaps a higher-for-longer bias, motivates SMA investors to think defensively, and premium municipal bonds may provide a viable investment solution, as many bonds are being offered at a premium to par value. Premium bonds can provide a defensive buffer in a rising rate environment and often is a better option on a risk-adjusted after tax return basis. If the Federal Reserve pivots to an inflation-driven rate hike, this becomes more relevant.
Today's expanding SMA platform actively seeks to maximize liquidity, obtain predictable cash flow and minimize duration volatility. Targeting higher-coupon structures helps to achieve these objectives. More sophisticated investors employ concepts, such as standard deviation, as a way to measure volatility.
On a relative basis, premium bonds tend to underperform in an appreciating market, but they cushion adverse price performance in declining markets (rising rates) because of their bigger coupons. Individual investors seeking relative value in today's market — and are not trading oriented — should seriously consider premium bonds.
Premium bonds can provide less secondary market price volatility than similar maturity bonds selling near par or at a discount. This is especially important to those investors concerned with the prospects of adverse price performance in declining markets. Generally, the higher the coupon rate, the smaller the price fluctuations following a change in interest rates. Conversely, discount bonds show more severe price movements after a swing in rates.
Lower prices are available on premium bonds priced to their call date prior to maturity (on the assumption the bonds will be called) — with a bonus of extra yield ("kicker") if the bonds are not called. In other words, the longer an investor holds the bond, the higher the incremental return.
To illustrate these points using cash flows, I wanted to identify real examples. Since my current role does not immerse me in a trading setting, I decided to ask ChatGPT. I gave specific instructions surrounding call and yield parameters for both a par and premium general obligation bond with New York City as my selected issuer.
Source data was derived from the New York City Comptroller's office. A March 2026 tax-exempt offering (Fiscal 2026 Series F and G) was used; the subseries F-1 bonds were not subject to par optional redemption. Given the premium bias of this transaction, my query returned a hypothetical parish bond with the same maturity. I feel comfortable with this methodology, as it provides a sound illustration of the value of premium bonds. Note this analysis does not account for reinvestment income and only considers coupon income.
Cash flows are shown for comparison purposes and a $100,000 investment is assumed for each. Keep in mind, the premium paid on a bond must be amortized over its life, with the resulting adjusted cost basis used to determine any capital gains or losses if the bond is sold prior to maturity. Tax advisors should always be consulted for specific tax implications.
Premium Bond:
Coupon 5.00%
Maturity 8/1/35
Yield to Maturity 3.52% (reoffering)
Price ~113.50
Face $100,000
Annual Interest $5,000
Hypothetical Par Bond:
Coupon 3.50%
Maturity 8/1/35
Yield to Maturity 3.55%
Price ~99.50
Face $100,000
Annual Interest $3,500
Premium Bond Net Cash Flow:
Interest (5% x 9 years) $45,000
Return of principal $100,000
$145,000
Purchase price $113,500
Net cash flow $31,500
Par Bond Net Cash Flow:
Interest (3.5% x 9 years) $31,500
Return of principal $100,000
$131,500
Purchase price ~$99,500
Net cash flow $32,000
By buying the premium bond, an investor is able to maximize tax-free income and cash flow. Even though net cash flow for the two bond types is very similar, annual cash flow for the premium bond is higher with the previously mentioned defensive characteristics.
The premium bond would be less volatile, as the percentage price change in the premium bond rises and falls less than that of the par bond.
This example assumes both bonds are held to maturity.
The par bond generates lower annual cash flows, which are more sensitive to changes in interest rates. Another way to look at this is the duration risk of a premium coupon is less than that of a comparable par bond, all else being equal.
To sum up, premium bonds generate more income and are less volatile than par and discount bonds.
The typical institutional investor is schooled in premium-priced bonds, given the positive attributes of premium bonds are found in the underlying cash-flow analysis. Given this dynamic, retail investors can often capture the benefits enjoyed by many institutional buyers.
Expectations for future reinvestment rates will influence decisions to purchase premium or par coupon bonds. For investors holding longer-term bonds, an allocation to higher cash-flow producing securities could provide a degree of protection from rising interest rates.
