Illinois Data Centers Face Power Reliability Risk

The market has been treating that theme as investable. Equinix, Digital Realty and American Tower have all been bid up sharply this year, reflecting expectations that scarce, power-ready capacity will keep pricing firm and occupancy elevated. Equinix was last around $1,065.39, after touching $1,079.08 on July 24 and more than doubling from roughly $772 in January. Digital Realty has climbed to about $190.62 from $163.60 in late October, while American Tower was trading near $175.80, modestly below its August peak but well above its June trough. The stocks’ rebounds track a broader view that digital infrastructure owners with high-quality power access and strong interconnection demand should keep benefiting even as financing costs remain sticky.

The upside case is straightforward: power-constrained markets increase the value of existing facilities, especially for operators that can deliver reliable uptime and absorb large AI-era workloads. Equinix has said in its latest filing that difficulty finding reliable partners and appropriate sites for expansion could limit growth, “especially” as it designs centers for more power-intensive technologies such as AI. Digital Realty has also pointed to leasing, customer expansions and power revenue as drivers of data-center growth. American Tower’s data-center segment has similarly benefited from new lease commencements, expansions and rent increases.

The bear case is less about demand and more about execution. If utilities, regulators and operators cannot keep pace with load growth, developers may face delays, margin pressure or lower retention if service reliability slips. That risk is especially relevant in places where industrial load, households and data centers compete for the same grid. The recent outage in Gary, Indiana, underscored how power failures can hit economically fragile communities hardest, but it also highlighted the broader vulnerability of the infrastructure underpinning digital commerce and enterprise computing.

For investors, the key question is not whether demand for data centers exists — it clearly does — but whether enough power can be brought online fast enough to monetize that demand. Companies with secured energy access and large installed footprints should keep the edge. Those still chasing land, permits and grid connections may find that the bottleneck has shifted from cloud adoption to electrons.

What happens next in Illinois and other power-constrained markets will matter well beyond local utilities. If grid reliability improves, data-center growth can continue feeding rents, leasing and capex across the sector. If it does not, the scarcity that has supported these stocks could become a constraint on expansion and a source of volatility.