ARM collects a royalty on every AI chip ever manufactured. Tomorrow's Q4 earnings will reveal whether building its own chip destroys the neutrality that makes the toll booth trusted. The licensing-versus-royalty split is the leading indicator.

Every AI chip pays ARM a royalty. NVIDIA's Grace. Amazon's Graviton. Apple's M-series. Google's Axion. Qualcomm's Snapdragon. MediaTek's Dimensity. Every custom hyperscaler design. The instruction set architecture is the toll booth, and there is no alternative route. ARM reported record royalties of seven hundred and thirty-seven million dollars in fiscal Q3, up twenty-seven percent year over year. Data center royalties doubled. The stock trades at two hundred and three dollars — a hundred and thirteen times forward earnings — up eighty-four percent this year.

Tomorrow ARM reports fiscal Q4. The consensus expects one point four seven billion dollars in revenue and fifty-eight cents in earnings per share.…