Two Michigan utilities are financing the largest construction programs in their corporate histories for customers whose buildings are not finished. DTE Energy, which delivers electricity to about 2.3 million customers in southeastern Michigan and gas to 1.3 million statewide, has signed 2.4 gigawatts of data-center agreements — 1.4 GW with Oracle already under construction, and 1 GW with Google awaiting regulatory approval expected in September. CMS Energy, whose Consumers Energy unit serves 1.9 million electric customers from Jackson, has agreed to supply roughly 1 GW to a single hyperscale site, with local zoning the remaining gate.

Both reported falling operating income in the June quarter. CMS revenue slipped 0.5% to $1.83bn while operating income dropped 16.7% and net income fell 40.3% to $120m. DTE's revenue fell 2.4% and operating income 7.3%; in the March quarter its operating income fell 34% even as revenue grew 15.8%. This is what a rate-base build looks like from the inside: depreciation, operating costs and interest arrive on the income statement before the regulator lets the meter reflect them.

The gap between what capital costs and what it earns

The Michigan Public Service Commission held Consumers Energy's authorized return on common equity at 9.9% with a 50/50 capital structure, rejecting the 10.25% the utility asked for. Weeks earlier it made the same call on DTE Electric, refusing a request for 10.75%.

Meanwhile the price of new capital has climbed toward that ceiling. NiSource sold $750m of junior subordinated notes at 6.25% on 13 August; NextEra placed $3.75bn of hybrid debentures in June at 6.00%-6.625%, and Emera issued at 6.65% and 6.85% in March. Duke's mid-August equity units cost 7.75% all-in. Against a 9.9% allowed return, incremental funding now carries two to three points of headroom — on five-year plans of $24bn at CMS, driving 10.5% compound rate-base growth, and $36.5bn at DTE.

Neither company can fund that internally. Both run negative trailing free-cash-flow yields, minus 8.9% at CMS and minus 6.9% at DTE. CMS filed a $3.0bn at-the-market and forward equity program in May; DTE targets $500m-600m of equity a year through 2030. Diluted share counts are up only about 0.5% so far, so most of the dilution is still ahead.

Who is actually ahead

The two compete for the same siting decisions under the same regulator, and the durable advantage is contract execution, not technology. DTE is ahead on executed load, with 2 GW more in advanced talks and what it describes as an 8.4 GW opportunity in Michigan. It told investors Oracle should deliver about $300m a year of bill benefit to existing customers and Google roughly $1.7bn over the contract's life, possibly deferring its next rate case to 2028. It also flagged Oracle's credit downgrade as a live risk on its largest signed contract, mitigated by collateral triggers.

CMS's protection is written into the tariff. Michigan's approved large-load terms require a 15-year minimum contract and a minimum billing demand of 80% payable whether the power is used or not. CMS is also selling NorthStar's non-utility renewable development arm, redirecting $1.7bn of capital to the utility and cutting planned equity issuance by at least $350m.

The politics are unresolved. Michigan's attorney general called DTE's offer of a two-year rate freeze conditioned on a data center opening on time a "ransom note."

The fall bought no cheapening

Since early May, CMS's market value is down 7.3% and DTE's 8.0% — and the multiples did not follow. CMS went from 20.6x trailing earnings to 20.2x; DTE's expanded, from 20.9x to 21.2x, because profit fell as fast as the price. Both sit near 17.5x forward against a long-run sector median closer to 16.8x. Consensus still carries CMS earnings up 7.8% this year and DTE up 6.6%, and both managements reaffirmed 6%-8% growth in July.

Over the past month the common shares have fallen faster than the companies' own listed hybrid notes — CMS down 5.7% against roughly 3.5% for CMSA, CMSC and CMSD; DTE down 7.0% against about 4.7% for DTB, DTG and DTW — inverting the twelve-month pattern, when the bonds fell 9%-16% and the equities held. That bond decline is duration, not doubt: the 30-year Treasury reached 5.34% on 18 August, a 19-year high, while utility investment-grade spreads sit at 95-105bp, inside their five-year average. The equity leg is the one repricing now.

The setup

Where it stands — Both utilities are growing rate base into contracted AI load while reported operating income falls and the shares de-rate without getting cheaper. Would confirm — Third-quarter operating income declining year on year again at either company, a third straight quarter. Would invalidate — Operating margin recovering toward 17% at CMS as new Michigan rates land, with 2026 guidance held. Watch next — The Michigan Public Service Commission's decision on DTE's 1 GW Google contract, expected September 2026. Valuation — CMS 20.2x trailing and 17.6x forward; DTE 21.2x and 17.5x, against a 16.8x long-run sector median.