Yahoo files strategic-investment marks under Interest Income

See also the sibling claim: [[pitfall-unrealized-equity-marks-break-headline-pe]] (filed 2026-08-04 on GOOGL). This note covers where the vendor files the mark; that one covers what the mark does to the P/E — on Alphabet it halved the displayed multiple, 37.6x shown as 18.9x. Same accounting, two independent failure modes. Check for both.

Claim

On AMAT, Yahoo reported $771M of "Interest Income" against ~$8.2B of cash — an implied 38% yield, which no cash instrument pays. The real source was an unrealized mark on AMAT's ~9% stake in BESI.

The consequence is worse than a mislabeled line. It makes non-operating, non-recurring, mark-to-market income look like recurring treasury income, which is exactly the distinction that separates real earnings growth from an accounting artifact. On AMAT it was the difference between "record EPS" and "operating income is flat."

Guard

A portfolio-specific passage was removed from the public build.

What would falsify this

Confirmation that the company itself reports the line this way in its filings, making it a company disclosure choice rather than a vendor parsing error. On AMAT it was demonstrably the vendor — the 10-Q separates the two lines correctly.

Related

[[pitfall-roicai-fcf-field-returns-ocf]] · [[principle-primary-source-beats-vendor]]

History

• 2026-07-29 — found during AMAT analysis. Directly produced the central finding that ~26% of TTM GAAP EPS was non-operating.