Impact in Action
In an investment landscape that often fixates on high-growth companies and generates headlines when volatility arises, it’s easy to overlook some of the more stable, consistent building blocks of a long-term portfolio. Municipal bonds – or “munis,” as they’re often called – offer a good example. While they may lack the headline-grabbing excitement of tech stocks, municipal bonds can offer a combination of tax benefits, relative stability, and positive local impact.
How do Municipal Bonds work?
Municipal bonds are debt or bonds issued by state and local governments, including affiliated agencies, to fund public projects. These projects might include construction or upgrades to new schools, hospitals, roads, water treatment facilities, affordable housing, or other infrastructure that benefits the community.
There are two main types:
- General Obligation Bonds: Backed by the “full faith and credit” of the issuing government, these bonds are supported by general taxation.
- Revenue Bonds: Backed by the revenue generated from a specific project or source, such as a toll road, hospital, or utility.
In addition to the local nature of these projects, another attraction of municipal bonds is their tax-exempt status. In most cases, interest income from municipal bonds is exempt from federal income tax, as well as state and local taxes if you live in the issuing state. For investors in high tax brackets especially within high tax states (like California or New York), this can be a significant advantage.
Creating Positive Impact
Muni bonds can be an area where investment and impact stories intersect. Beyond the tax benefits, municipal bonds are increasingly being recognized for their role in funding positive social and environmental outcomes.
Many of the most pressing ESG (Environmental, Social, and Governance) challenges including climate change, affordable housing, education access, and clean water are being addressed not at the federal level, but at the local level. Municipal bonds are a primary funding mechanism for these efforts.
- Utilities have used muni bonds to help fund solar and wind infrastructure to increase the clean energy provided to local communities.
- School district muni bonds have supported underserved communities.
- Hospitals and healthcare systems have turned to municipal markets to fund new clinics or acquisition of new medical equipment.
Municipal bonds may not be the flashiest investment on your statement, but they can play a quietly powerful role. They offer consistent income, potentially valuable tax advantages, and an opportunity to invest in the kind of world we want to live in – cleaner, healthier, more equitable
Impact Profile: Bridger Aerospace
Munis, Impact, and the LA Wildfires
In 2022, $160 million of municipal bonds were issued to support wildfire suppression efforts by expanding aerial firefighting capabilities. These bonds have been held in our ESG portfolios within the Nuveen Core Impact Bond Fund.
The bond proceeds provided Bridger Aerospace with the financing to build two specialized airplane hangars and acquire four new SuperScooper firefighting planes. Amid record-breaking, year-round wildfire seasons and a changing climate, Bridger meets an underserved and growing need for next-generation aerial firefighting and utilizes sustainable and environmentally safe firefighting methods. Each plane can scoop 1,600 gallons of water at a time and deliver directly onto an active fire, then refill multiple times – often delivering up to 50,000 gallons – before needing to land for refueling. By sourcing water near fires, they minimize harm to the local water system and reduce flight time between scoops.
Bridger Aerospace, which operates six SuperScoopers, moved two planes to the LA region in the early days of the wildfire suppression efforts in January 2025.
New Labels for Impact-Oriented Bonds
In recent years, more issuers have begun labeling their bonds according to specific use-of-proceeds criteria.
- Green bonds fund environmentally focused projects, including renewable energy, conservation, or public transportation.
- Social bonds support projects with broad social benefits, including low-income housing or public education.
- Sustainability bonds combine both green and social objectives.
While labeling is voluntary and standards vary, it’s an encouraging trend. It allows investors to more easily assess impact and
risk, as well as align their fixed income exposure with their values.
Beyond labeled bonds, ESG factors are increasingly being integrated into the credit analysis process. For example, a city with strong climate resilience measures and inclusive governance may be more financially stable than one without. Municipal analysts are paying closer attention to long-term risks like sea-level rise, water scarcity, and demographic shifts, which in turn helps investors make more informed, future-focused decisions.
