Infrastructure investing focuses on the physical assets that economies depend on, such as roads, utilities, pipelines and airports, along with newer digital assets like data centers, cell towers and fiber networks. Traditional infrastructure is often valued for long-lived assets with regulated or contracted revenue, while digital infrastructure shares some of those features but is tied more closely to growth in data, connectivity and computing. Infrastructure ETFs differ widely depending on which assets they include.<\/p>\n
Infrastructure assets typically share several characteristics:<\/p>\n
Essential services.<\/strong> They provide services that households and businesses need regardless of economic conditions, such as electricity, water, transportation and communications.<\/p>\n Long lives.<\/strong> Many assets operate for decades once built.<\/p>\n High barriers to entry.<\/strong> They are expensive to build and often require permits, rights of way or licenses, which limits competition.<\/p>\n Predictable revenue.<\/strong> Revenue often comes from regulated rates, long-term contracts or usage fees, which can make cash flows more stable than those of many other businesses.<\/p>\n Capital intensity.<\/strong> Building and maintaining infrastructure requires large, ongoing investment, often financed with debt.<\/p>\n These features explain why infrastructure has been viewed as a distinct asset class, with characteristics that differ from both traditional equities and bonds.<\/p>\n Traditional infrastructure covers the physical networks that have supported economies for generations.<\/p>\n Utilities.<\/strong> Electric, gas and water utilities generate, transmit and distribute essential services. Many are regulated, earning returns approved by state or national regulators.<\/p>\n Transportation.<\/strong> Toll roads, airports, seaports and railroads earn revenue from usage, often under long-term concessions or with pricing power from limited competition.<\/p>\n Energy midstream.<\/strong> Pipelines, storage terminals and processing facilities move oil, natural gas and related products, often under long-term, fee-based contracts.<\/p>\n Social infrastructure.<\/strong> Hospitals, schools and other public facilities are sometimes financed through public-private partnerships, though these are less common in listed markets.<\/p>\n Digital infrastructure includes the physical assets that carry, store and process data.<\/p>\n Data centers.<\/strong> Facilities that house servers, storage and networking equipment for cloud computing and AI. Developers lease space and power to tenants, often under multiyear contracts. Our article on how data centers work<\/a> explains their components.<\/p>\n Cell towers.<\/strong> Companies own towers and lease space to wireless carriers, typically under long-term contracts with built-in escalators.<\/p>\n Fiber networks.<\/strong> Fiber lines carry data between cities, data centers and end users. Owners earn revenue from leasing capacity.<\/p>\n Satellite and subsea networks.<\/strong> These carry data across regions and oceans and connect remote areas.<\/p>\n The two groups share structural features but differ in their drivers.<\/p>\n Revenue model.<\/strong> Traditional assets often earn regulated returns or usage fees tied to population and economic activity. Digital assets usually earn contracted lease revenue, with demand linked to data traffic, cloud adoption and computing needs.<\/p>\n Growth profile.<\/strong> Traditional infrastructure grows with the economy, population and replacement needs. Digital infrastructure has grown with data consumption and, more recently, with AI-related computing.<\/p>\n Technology risk.<\/strong> Roads and pipelines change slowly. Digital infrastructure faces faster technology change, which can affect the useful life and design of assets.<\/p>\n Customer concentration.<\/strong> Utilities serve many customers. Data center and tower owners often depend on a smaller number of large tenants.<\/p>\n Interest rate sensitivity.<\/strong> Both groups are capital intensive and often carry significant debt, so higher interest rates can raise financing costs and affect valuations.<\/p>\n Increasingly, yes. AI data centers require large amounts of reliable electricity, which links digital infrastructure directly to utilities, power generation and grid equipment. Utilities are planning new generation and transmission to serve data center demand, and data center developers are pursuing their own power arrangements. Our article on AI power and electrification<\/a> describes how the grid supports AI.<\/p>\n That convergence means some companies once considered traditional infrastructure now have meaningful exposure to digital trends, and digital infrastructure growth depends on traditional assets.<\/p>\n Much existing infrastructure is aging. The American Society of Civil Engineers gave U.S. infrastructure an overall grade of C in its 2025 Report Card, its highest grade since the assessment began in 1998, and estimated a $3.7 trillion gap between planned investment and what is needed to bring U.S. infrastructure into good repair over the following decade.1<\/sup> The Infrastructure Investment and Jobs Act of 2021 directed federal funding toward roads, bridges, water, broadband and the power grid, and ASCE credited that funding with contributing to the improved grade.1<\/sup><\/p>\n Public budgets alone are unlikely to meet these needs, which is one reason private capital, including listed infrastructure companies, plays a growing role.<\/p>\n Infrastructure ETFs vary considerably. Some focus on listed global infrastructure, including utilities, transportation and midstream companies. Others focus on U.S. infrastructure development, holding construction, engineering, materials and equipment companies that build and maintain infrastructure, rather than the owners of the assets. Some are dedicated to digital infrastructure, holding data center owners, tower companies and fiber providers, often structured as real estate investment trusts.<\/p>\n These differences are important. A fund holding infrastructure owners tends to emphasize steady cash flows. A fund holding infrastructure builders tends to be more cyclical, tied to construction spending. A digital infrastructure fund depends on data demand and leasing. Our article on how to evaluate a thematic ETF<\/a> offers a framework for comparing holdings and methodology.<\/p>\nWhat counts as traditional infrastructure?<\/h2>\n
What counts as digital infrastructure?<\/h2>\n
How do traditional and digital infrastructure compare?<\/h2>\n
Are the two groups converging?<\/h2>\n
Why is infrastructure investment a policy priority?<\/h2>\n
What do infrastructure ETFs own?<\/h2>\n
What are the risks of infrastructure investing?<\/h2>\n