The selling that hit the companies that build and rent out data centres in late July did not start with a cancelled contract. It started in the credit market. On 28 July, insurance against default by CoreWeave — the rental provider of graphics-processor capacity that is the single largest tenant in this business — blew out to roughly 855 basis points, implying about a 50% chance of default within five years. Days later, lenders to a $2.6bn CoreWeave facility extracted 100-125 basis points of extra spread plus maintenance covenants including a 1.35x debt-service coverage test before committing money. Every company that borrows to pour concrete around someone else's chips was repriced within 48 hours.

The average is not a business

Grouping these six together produces a 30-day drop of 17.4% — a number that mostly measures the two smallest. SharonAI (-34.6%) and WhiteFiber (-33.0%) are worth about 7% of the group's roughly $20.6bn of combined value yet supply about a quarter of the arithmetic. Weighted by size, the decline is 9.1%. GDS fell 2.6%.

The twelve-month picture splits by geography, not by industry: Keel Infrastructure +203%, Applied Digital +105%, WhiteFiber +52%, against GDS -14.2% and VNET -10.1%. The wider complex sorted the same way over the past month — the investment-grade landlords Digital Realty (+9.9%) and Equinix (+2.6%) rose while leveraged developers TeraWulf (-25.2%), Vertiv (-14.3%) and Nebius (-13.2%) fell. This is a funding event.

The two that got cheaper while improving

GDS Holdings, which develops carrier-neutral data centres across mainland China and rents space to cloud and internet firms, has revenue growth accelerating from -2.6% a year ago to +8.6% and then +23.6% last quarter. Gross margin reached 33.6% against 23.7% a year earlier; adjusted EBITDA rose 47.2% and net new bookings hit a record 200 megawatts, with full-year guidance of RMB12.4-12.9bn reaffirmed. It trades at 15.6x trailing earnings, 13.75x enterprise value to EBITDA and 1.37x book — profitable, which nothing else here is. The offsets are structural: higher leverage than US peers, and the standing US delisting and audit-compliance overhang on Chinese issuers.

VNET Group, the Beijing hosting operator, is the cheapest in the group at 9.58x EV/EBITDA. Wholesale utilisation rose to 75.7% with mature sites at 93.8%, 516MW under construction at an 85.8% pre-commitment rate. The catch is cash: guided capex of RMB10-12bn is roughly three times guided EBITDA, and trailing free cash flow yield is -45.5%.

For both: the business CONTRADICTS the move. Neither participated in the AI re-rating, and neither has deteriorated.

Contracts versus the cost of funding them

Applied Digital, a Dallas developer that leases whole campuses to computing tenants, is where demand and funding collide. Fiscal 2026 revenue rose 183.7% to $611.3m, and 1,410MW of contracted load now represents about $36bn of revenue over initial 15-year terms, including three leases signed in one quarter worth roughly $20bn to a single investment-grade hyperscaler. Against that: $5bn of debt versus $4.2bn of cash and only $42.4m of adjusted EBITDA, quarterly gross margin down to 15.7% from 42.5%, and free cash flow yield of -33.4%. Price-to-sales has halved from about 24.8x at the 52-week high to 14.4x trailing, 10.1x forward. Verdict: INCONCLUSIVE — the backlog is real and so is the funding gap.

The other three lack the contracts. Keel Infrastructure, the former bitcoin miner Bitfarms, saw revenue fall 44.7% to $37.0m at a -71.1% gross margin and has not signed a single computing lease, targeting three by year-end with revenue only from 2027. Its forward price-to-sales of 22.5x exceeds its trailing 12.7x because consensus has 2026 revenue falling 59%. WhiteFiber, spun out of Bit Digital last August, is decelerating — 68.7% to 57.9% to 30.7% growth, revenue down sequentially, operating margin from +10.5% to -50.3% — while consensus still models +63.5% this year. SharonAI, 25 employees, earned $1.57m in 2025 and trades at 334x trailing sales against announced but unstarted contracts including a $373m five-year cloud deal. For these three the fundamentals CONFIRM the de-rating.

On the tape, all six topped on 22-23 June and lost most of the ground in two sessions on 28-29 July, then rebounded hard on 30 July — WhiteFiber +27.6%, Applied Digital +20.5%. That is a liquidity flush, not a demand signal.

The setup

Where it stands — A credit scare, not lost demand, repriced six data-centre operators; the two profitable Chinese ones fell least and grew most.

Would confirm — GDS holding revenue growth above 20% and reaffirming RMB12.4-12.9bn guidance; VNET utilisation rising above 75.7%.

Would invalidate — Applied Digital raising equity or secured debt above its 7.000% 2031 coupon, or a tenant deferring contracted megawatts.

Watch next — Second-quarter results from GDS and VNET, and Keel's stated deadline of three computing leases signed by 31 December 2026.

Valuation — GDS 13.75x trailing EV/EBITDA and 15.6x earnings; VNET 9.58x; Applied Digital 14.4x trailing sales, 10.1x forward, from 24.8x at its high.