National Grid (LSE: NG.) has long been a fixture of the FTSE 100, valued by investors primarily for its stability and reliable income rather than any meaningful growth potential.
That familiar framing is now beginning to look less certain as the energy landscape undergoes a fundamental transformation.
Rising electricity demand, electrification, and mounting pressure on grid capacity are reshaping how investors perceive the business and its long-term prospects.
Rather than viewing National Grid as a purely defensive utility, investors are increasingly treating it as a structural infrastructure growth story with compounding potential.
For decades, valuing the company was relatively straightforward, with reasonable assumptions available around future earnings, dividends, and regulated returns keeping risk low but growth expectations modest.
The company’s vast network assets created formidable barriers to entry, while regulation provided a level of earnings visibility that most businesses could only dream of achieving.
The downside of that model was clear: businesses expected to grow slowly rarely command premium valuations, and National Grid was no exception to that rule.
What is changing now is the scale of growth being forecast, with Bank of America believing National Grid could deliver annual earnings growth of 8% to 10% through to 2031.
The key driver is a sustained rise in investment across the electricity network, centred on a multi-year programme to expand grid capacity supported by regulated returns.
Higher investment today feeds into a larger regulated asset base and, ultimately, higher allowed earnings in future periods, introducing something closer to a long-term compounding dynamic.
This shift raises a genuine question about whether the traditional valuation framework applied to this business will remain appropriate in the years ahead.
The principal risk to that growth thesis is regulation, since National Grid’s expansion plans rely heavily on a framework that allows it to earn a return on billions of pounds of infrastructure investment.
Recent events surrounding Thames Water have highlighted the growing scrutiny being placed on operators of critical national infrastructure across the United Kingdom.
While electricity networks face a very different set of circumstances to water companies, the episode serves as a clear reminder that regulatory conditions are not permanently fixed.
If household energy bills remain elevated, future governments could face increasing pressure to prioritise consumer affordability over investor returns, potentially leading to lower allowed returns from Ofgem.
Tighter controls on how network costs are passed on to consumers represent another avenue through which the regulatory environment could become less favourable for the company over time.
Investors should remain mindful that much of National Grid’s long-term growth story depends on regulatory decisions that are not entirely within management’s control, which introduces a meaningful layer of uncertainty.
Despite those risks, the investment case remains broadly intact, with the company’s growth profile looking considerably more compelling today than it did a decade ago.
If earnings can compound at the rates analysts at Bank of America expect, the market may eventually conclude that National Grid deserves a materially higher valuation than a traditional utility would attract.
For investors willing to weigh regulatory risk against a genuinely transformed growth outlook, National Grid shares represent a story worth following closely in the months ahead.