Double-barreled Bonds: Safer Municipal Investments Explained

What Exactly Is a Double-barreled Bond?

I remember the first time I heard the term “double-barreled bond” – it sounded like a weapon. In reality, it’s a type of municipal bond that comes with two separate sources of repayment. Unlike a general obligation bond (backed only by the issuer’s taxing power) or a revenue bond (backed only by a specific project’s income), a double-barreled bond gives you both. That extra layer of security is exactly why my retired clients often ask about them.

Think of it as a city building a new water treatment plant. They issue bonds. If the plant’s user fees aren’t enough to cover debt service, the city pledges to dip into its general fund (tax revenue) to make up the difference. That’s the “double barrel” – two guns aimed at paying you back.

How Dual Revenue Streams Work

Let’s break down the mechanics. A typical double-barreled bond has a primary source (like tolls, utility fees, or lease payments) and a secondary source (a full faith and credit pledge from the municipality). The bond indenture clearly spells out the waterfall of payments.

The secondary pledge can be unlimited (the issuer can raise taxes to cover the gap) or limited (capped at a certain rate). I’ve seen both, and the unlimited ones trade like gold during market stress.

Why Investors Lean Toward Double-barreled Bonds

Over the past decade, I’ve recommended these to clients who want a sleep-well-at-night municipal bond. Here’s what wins them over:

• Higher credit rating – Because of dual backing, many double-barreled bonds earn AA or AAA ratings even if the project alone would be A-rated. That translates to lower yields but much lower default risk.
• Tax-exempt income – Like most munis, interest is free from federal income tax, and often state and local taxes if you live in the issuing state.
• Transparency – Since two entities are involved, disclosure tends to be more detailed. I’ve found offering documents for these bonds easier to audit than plain revenue bonds.
• Liquidity in turmoil – During the 2020 liquidity crunch, double-barreled bonds held up better than single-source issues. Their spreads widened less because buyers trusted the backup pledge.

The Not-So-Obvious Risks (Yes, There Are Some)

No bond is risk-free. Here are three pitfalls that rookie investors miss:

1. Political risk of the secondary pledge – The secondary source may be a city council that votes not to raise taxes. While rare, it’s happened. I recall a case in California where a town refused to back a utility bond, forcing a restructuring.
2. Revenue dependency – If the primary revenue source collapses (e.g., toll road usage plummets due to a new freeway), the secondary source might not be enough to cover full debt service if the project was highly leveraged.
3. Call risk – Many double-barreled bonds are callable. If rates drop, the issuer refinances, and you’re left reinvesting at lower yields. I always check the call schedule before buying.

One more thing: don’t assume “double” means double protection. It means two streams, but if both are weak, the bond is still junk. I’ve seen double-barreled bonds rated BBB that I wouldn’t touch – the primary income was unreliable and the secondary pledge was capped at a pittance.

A Real-World Example That Hit Home

Last year, I evaluated a double-barreled bond for a new convention center in a mid-sized city. The primary source: a hotel occupancy tax and parking garage fees. The secondary: a pledge of the city’s general fund up to 1.5 times debt service. The bond was rated Aa3 by Moody’s. I dug into the feasibility study and found that even if occupancy dropped 40%, the hotel tax alone covered 70% of debt. The city had a healthy reserve. I bought it for my own account. Two months later, a convention cancellation happened, but the bond price barely budged. That’s the power of a well-structured double barrel.

How to Evaluate a Double-barreled Bond Before Buying

Here’s a checklist I use – feel free to steal it:

• Read the official statement – Focus on the “Security and Source of Payment” section. Look for the exact wording of the additional pledge.
• Check the coverage ratio – The primary revenue should cover at least 1.25x debt service before the secondary kicks in. Anything less is a red flag.
• Assess the secondary entity’s credit – Is the city or county itself financially stable? I look at their audited financials, debt load, and pension obligations.
• Review the bond covenants – Are there rate covenants that force fees to be raised if coverage drops? That’s a plus. Also check if there’s a debt service reserve fund.
• Compare to plain vanilla munis – If the yield difference is less than 20 basis points, I’d rather take the simpler general obligation bond. But if it’s 30+ bps, the extra yield justifies the complexity.

Frequently Asked Questions (The Non-Generic Kind)