Valuation

Why a utility is not a bond substitute

Utilities get bought as bonds that grow. They are not bonds at all — and the three numbers a screener shows you about one are all category errors.

In a hydroelectric turbine hall at night, an antique bond certificate under a glass dome stands beside a brass revenue meter with turning number wheels, between engraved brass plates reading THE BOND and THE BUSINESS, with rows of navy generator housings receding into the dark.

NextEra yields 2.8%. The ten-year Treasury reached 5.12% three weeks later.

If you own a utility as a substitute for a bond, that sentence should stop you. The substitute pays about 55% of what the original pays, and the original cannot cut its coupon, lose a rate case, or issue more of itself to you at a worse price.

But the yield comparison is the smaller half of the problem. The larger half is that a utility was never a bond in the first place — and almost every number a screener will show you about one is measuring the wrong thing.

◆ The category error

Three numbers that are right and useless

NextEra, as at our August 2026 report

What the screen saysWhy it looks alarmingWhy it means nothing here
Altman-Z of 1.08Nominally the distress zone — the range associated with bankruptcy riskThe score was built in 1968, on 66 manufacturers. It reads heavy fixed assets funded with debt as danger. For a regulated utility, that structure is the licence.
Free cash flow −$11bnThe company consumes eleven billion dollars a year more than it producesThat is what a working utility looks like. The spending goes into regulated assets the regulator then allows a return on. It is not a leak; it is the mechanism.
Return on capital 4%A dismal return, barely above cashA regulated utility does not earn a return — it is awarded one. Florida authorised 10.95%. Florida Power & Light earned 11.70%.
From our 18 August 2026 X-Ray at $86.19. All three screen figures are arithmetically correct. All three are answers to questions that do not apply.

Read the last row twice. The regulator authorised 10.95% and the utility earned 11.70% — it beat its allowance. That is the number that describes how this business is doing, and there is no screener in the world that will show it to you, because it does not come from the financial statements. It comes from a rate case.

A regulated utility does not earn a return. It is awarded one, and then either achieves it or does not. Everything else is downstream of that sentence.
◆ The difference

A bond and a rate base are not the same instrument

A government bondA regulated utility
What you are owedA fixed coupon, by contractNothing. A regulator sets an allowed return
Who can change itNobodyA state commission, in a public proceeding
Your capital backAt par, on a stated dateWhatever the shares fetch, whenever you sell
GrowthNone — the coupon is the couponThe rate base grows, so the earnings base grows
DilutionImpossibleRoutine — new assets are funded partly with new shares
The fourth row is the reason to own one. The other four are the reasons it is not a bond.

The fourth row is the entire investment case, and it is a real one. A bond's coupon is fixed forever; a utility's earnings base compounds as it builds. Over twenty years that difference is enormous and it is why utilities have rewarded patient owners.

But it only works if the growth actually arrives. Which brings us to the number almost nobody wrote about.

◆ The buried fact

The growth rate steps down by 40%

From about 10% to 6%, from the end of 2026

NextEra's reputation was built on roughly 10% annual dividend growth. Buried in the guidance is that it steps down to 6% from the end of this year — a 40% reduction in the growth rate, disclosed rather than announced.

Work through what that does to the only argument for accepting 2.8% today. Starting at a 2.8% yield and growing 6%, your yield on the price you paid passes the 5.12% the Treasury pays today in year eleven. At the old 10% rate, it got there in year seven.

Four extra years of waiting to reach a return you can have this afternoon, risk-free. That is not an argument against owning it. It is the argument you are actually making, stated honestly.

◆ The other side

What the same company is building

It would be unfair to leave it there, because the growth is not imaginary. NextEra is in the middle of the largest utility merger in American history — buying Dominion for around $67 billion in stock — which puts 36% of its rate base in Virginia.

Virginia is the densest concentration of data centres on earth. A regulated utility whose rate base sits underneath the one industry currently building as fast as it can raise money is not a bond proxy in any sense. It is a leveraged, regulated bet on electricity demand — with the regulator setting the return and the data centres setting the volume.

That may work very well. It is simply a completely different thing from the safe income substitute the label implies.

◆ So what

Three checks before you buy a utility

1
Find the allowed return on equity, and whether they are earning it

It is public — it comes from the rate case, not the accounts. A utility earning above its allowance is operating well; one persistently below it has a problem no margin analysis will reveal. Florida authorised 10.95% and the utility earned 11.70%.

2
Find the rate base growth rate, and the funding mix

Rate base growth is future earnings growth, almost mechanically. But check how it is being paid for: if a large share comes from issuing new shares, some of that growth is being handed to the new shareholders rather than to you.

3
Write the yield against the ten-year, then against the dividend growth rate

Two numbers, one line. If the yield is below the bond and the growth rate has just been cut, you are being asked to wait longer for less. That can still be the right trade — but make it deliberately.

And ignore the screener entirely

Of the three alarming numbers we started with, not one would change our view of this company by a single point. The distress score is a 1968 model applied to a business it was never built for; the negative cash flow is the business model working; the 4% return on capital is measuring a return that is set by a commission rather than earned in a market.

If you take one habit from this piece: before applying any ratio, ask what the ratio was designed to detect, and whether that thing can even happen here.

◆ Three income holdings, on live data

A regulated utility yielding below the bond, a net-lease REIT just above it, and a pipeline paying for the gap with leverage.

The hurdle every income holding now has to clear — and how few of ours do.What a 5% risk-free rate does →
◆ Questions readers ask

Frequently asked

Are utility stocks a good substitute for bonds?

Not at these levels, and not structurally. NextEra yielded 2.8% at our August 2026 report against a ten-year Treasury that reached 5.12% in September — a substitute paying barely half of what the thing it substitutes for pays. Structurally the two are different instruments: a bond pays a fixed coupon and returns your capital, while a utility is awarded a percentage return on an asset base that grows.

Why is NextEra's free cash flow negative?

Because that is what a working utility looks like. Free cash flow of minus $11 billion a year is the signature of a company investing more than it earns into new regulated assets — and since the regulator then allows a return on those assets, the spending is how future earnings are created. Negative free cash flow is a warning sign in most industries and a description of the business model in this one.

Does a low Altman-Z score mean a utility is in trouble?

No. NextEra's Altman-Z of 1.08 sits nominally in the distress zone, and it means nothing here: the score was built in 1968 on 66 manufacturers, and it reads heavy fixed assets funded by debt as danger. For a regulated utility that structure is the licence. Meanwhile Florida's regulator authorised a 10.95% return and Florida Power & Light earned 11.70%.

How do you actually value a regulated utility?

On three things a screener does not show: the allowed return on equity the regulator has authorised, whether the company is actually earning it, and how fast the rate base is growing. A regulated utility does not earn a return in the ordinary sense — it is awarded one, and then either achieves it or does not. Everything else is downstream of those three.

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Not investment advice. Dividend Line publishes research and education, not recommendations. Figures are as of the date stamped on this article and may have changed. Do your own work before buying or selling anything. Full disclaimer.