Latest / The Fiscal Policy Podcast with Fexingo: Government Budgets, Stimulus, and Public Spending / Why Governments Still Love Infrastructure Bonds
Transcript
- Lucas: So there's this quiet but massive corner of public finance that almost never makes headlines, and it is how governments borrow specifically to build things — roads, water treatment plants, solar farms. I am talking about infrastructure bonds. Luna: And when you say 'quiet', you mean it in terms of media attention, not volume. Lucas: Exactly. The total U.S. municipal bond market is roughly four trillion dollars. A large slice of that is infrastructure. And yet most people's mental model of government borrowing is just 'the national debt goes up.' They don't think about a city issuing a thirty-year bond to replace a lead water pipe. Luna: Which is funny because the infrastructure bond is actually one of the oldest financial instruments we have. Lucas: Right. The first major U.S. example was the railroad bonds of the 1830s. States and cities issued debt to fund rail lines, and investors — mostly European — snapped them up. Some of those bonds defaulted, by the way. But the model stuck. Luna: And today, what does the typical infrastructure bond look like? Who issues it, who buys it? Lucas: Typically, a state or a city issues what's called a general obligation bond, backed by its taxing power, or a revenue bond, backed by the income from the project itself — tolls, water fees, that sort of thing. The buyer is often a pension fund, an insurance company, or a retail investor in a municipal bond fund. The key feature is that the interest is exempt from federal income tax, which lets the issuer borrow at a lower rate. Luna: So the federal government is effectively subsidizing state infrastructure through the tax code. Lucas: Exactly. The Treasury foregoes tax revenue on those interest payments, and in return, cities get cheaper capital. It's an indirect subsidy that costs about forty billion dollars a year in lost federal revenue, according to the Joint Committee on Taxation. Luna: That's a real number. And it's been growing. Lucas: It has, especially with the rise of what's called green bonds. Since 2014, municipalities globally have issued about three hundred billion dollars in bonds explicitly labeled 'green' — tied to climate-friendly infrastructure like solar, electric transit, water recycling. Luna: And the investors accept those because the label itself signals something about risk or mission? Or is it just a normal bond with a sticker? Lucas: It's somewhere in between. The label doesn't change the credit rating — a green bond from a city with weak finances is still junk. But for large institutional investors like CalPERS or BlackRock, having a green allocation is a mandate. They have to put capital into esg labelled products. So the green label opens up a broader pool of demand. Luna: And that demand can actually push yields down a few basis points, right? I've seen studies showing a 'greenium'. Lucas: There is a small but measurable green premium. A 2024 study by the Climate Bonds Initiative found that green municipal bonds in the U.S. priced about three to five basis points tighter than comparable conventional bonds. It's not huge, but for a city issuing five hundred million dollars, that's real savings. Luna: Let's talk about a concrete example. Which city has done this well? Lucas: Los Angeles is a good one. In 2019, the Los Angeles Department of Water and Power issued about one billion dollars in green revenue bonds to fund the Hyperion Water Reclamation Plant upgrade and several solar installations. The bonds were rated AA by S&P, and they were oversubscribed. The city used the green label to attract environmental-focused investors who might not have bought a standard utility bond. Luna: And that project is now running? It's not just a financing gimmick? Lucas: The plant upgrades are operational. They increased water recycling capacity by about thirty million gallons per day. So the bond proceeds went to actual infrastructure that produces a measurable outcome — which is the whole point of the instrument. Luna: But not every infrastructure bond goes so smoothly. There are famous failures. Lucas: Sure. The most cited cautionary tale is the Jefferson County, Alabama sewer bond debacle. In the early 2000s, the county issued over three billion dollars in bonds to overhaul its sewer system. Corruption, cost overruns, and a recession led to the largest municipal bankruptcy in U.S. history at the time, in 2011. Bondholders took huge losses. Luna: So what went wrong? Was it the project itself, or the financing structure? Lucas: Both. The project was poorly managed — costs spiraled from an estimated 250 million to over 3 billion. But the financing structure made it worse. They used variable-rate bonds and interest rate swaps that blew up when the financial crisis hit. Fixed-rate, plain-vanilla bonds would have been safer. Luna: That's the tension, right? Simple bonds are safer, but cities often get tempted by complex structures to save a few basis points. Lucas: Exactly. And that's where the role of financial advisors and underwriters becomes crucial. The best-run cities use plain-vanilla competitive sales with clear disclosure. The worst-run ones negotiate private placements with exotic terms that few people understand. Luna: Now, with the current federal infrastructure push — the bipartisan infrastructure law and the IRA — is that crowding out state and local bond issuance, or complementing it? Lucas: It's mostly complementing. The federal money usually comes as grants or tax credits, not loans. So a city might use a federal grant for part of a project and then issue bonds for the rest. In fact, some federal programs explicitly encourage bond issuance by providing credit enhancements, like the Transportation Infrastructure Finance and Innovation Act, or TIFIA, which offers low-interest federal loans that can backstop bond issues. Luna: So the federal government is both subsidizing the tax exemption and offering direct loans. Lucas: Right. And that dual role has created a weird dynamic where some large projects are financed through a layered capital stack — a federal grant, a TIFIA loan, and then a municipal bond tranche. It's efficient, but it also means the federal government has a lot of leverage over local infrastructure decisions. Luna: Which some people love and some people hate. Depending on whether you trust Washington or City Hall more. Lucas: Exactly. And that's really the political heart of infrastructure finance. The bond market allows cities to act independently of the federal budget cycle, but the tax exemption is a federal policy choice. If Congress ever capped or eliminated the tax exemption — which has been proposed multiple times — the cost of borrowing for states would go up significantly. Luna: There was a proposal in the 2017 tax reform to eliminate tax-exempt bonds for professional sports stadiums, and it didn't pass. But it shows the vulnerability. Lucas: Right. And there's a broader point here: infrastructure bonds are a policy tool that most citizens benefit from without ever thinking about. Your tap water, your commute, your streetlights — a lot of that capital came from someone buying a bond. Luna: It's almost invisible finance. And that's part of what makes it interesting to talk about on a podcast like this, where we try to surface the mechanics that usually stay under the hood. Lucas: And speaking of keeping this podcast under the hood — we deliberately don't run ads. No sponsors, no commercials. It's a choice we made because we want every episode to be purely about the idea. If that approach resonates with you, and you want to support it, there's a link: buy me a coffee dot com slash fexingo. Literally just helps cover hosting and research time. Totally optional, but appreciated. Luna: Yeah, it keeps us independent. And we don't have to pitch you something in the middle of explaining bond yields. Lucas: Exactly. So, back to bonds — one trend I'm watching is the rise of direct purchase agreements. Instead of issuing a public bond, some cities are borrowing directly from a bank or a pension fund, avoiding the public market altogether. Luna: Is that a good thing? More efficient or less transparent? Lucas: It's a trade-off. Direct purchases can be cheaper because you skip underwriting fees, but they lack price discovery. You don't really know if you got a fair rate. For small, frequent issuers, it can work well. For a city issuing its first bond in a decade, the public market provides a benchmark. Luna: So the future of infrastructure bonds is probably a mix: plain-vanilla public bonds for big projects, direct placements for smaller ones, and green-labelled bonds wherever there's an environmental angle. Lucas: I think so. And as the federal government debates its own infrastructure spending levels, the municipal bond market will keep humming along, doing what it's done for almost two centuries: turning savings into roads. Luna: It's a good reminder that the most durable financial tools are often the quietest.