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Vendor forward EPS does not move on the day of a guidance cut, so the crash makes the stock screen cheapest exactly when it got worse
Claim
Price is a tick. Consensus forward EPS is a survey. They update on completely different clocks: price reprices a guidance cut in minutes, while the estimate feed waits for analysts to publish revised models, which takes anywhere from hours to a week.
The forward P/E displayed in a vendor snapshot is the ratio of the two. On the day of a cut, its numerator has fully absorbed the bad news and its denominator has absorbed none of it. The multiple falls by the entire size of the crash, and reads as opportunity.
Evidence — HONA, 2026-08-06
Honeywell Aerospace cut FY26 guidance after the close on 8/5 and fell 23.2% on 8/6.
| Vendor snapshot, 8/6 close | Company's own revised guide | |
|---|---|---|
| Price | $156.47 | $156.47 |
| Forward EPS | ~$9.61 (implied) | $7.60–7.90 |
| Forward P/E | 16.28x | 20.2x |
The vendor's implied $9.61 is above even the pre-cut street number (~$8.86) and 22% above the top of the company's new range. A screen run on the evening of the crash would have surfaced HONA as a 16x aerospace name against a peer set at 20–34x — a 24% understatement of its true multiple, in the direction that invites a purchase.
A second, live instance the day before: ZTS's PE(fwd) 10.40 still carried the
superseded guide after its second FY26 cut; the true forward was 12.4x on $6.20.
Why this is dangerous rather than merely untidy
It is the same failure shape as [[pitfall-dyt-inverts-when-price-caused-the-yield]] and [[pitfall-forward-pe-above-trailing-pe-flags-an-inflated-base]]: the signal strengthens as the business weakens. Worse, this one fires precisely when attention is highest — a −20% day is exactly when a name gets looked at, and exactly when its displayed multiple is least trustworthy.
How to apply
- Any name that fell hard on an earnings day: never quote its vendor forward P/E.
Recompute it:
price ÷ midpoint of the company's own revised EPS guide. - If the company did not previously guide EPS, the vendor number is pure consensus and may be days from catching up. HONA had never issued an EPS guide before this print — the $7.60–7.90 range was brand new, so no estimate in the feed reflected it.
- Sanity check: implied forward EPS =
price ÷ PE(fwd). If that number sits above the company's stated guidance range, the feed is stale. This is one division and it settles it. - The staleness window is 1–5 sessions. Re-pulling the snapshot a week later usually fixes it — but a watchlist entry or screen written on the day of the crash freezes the bad number into the file, where it survives long after the feed corrects.
- Check the analyst target the same way. HONA's displayed mean target of $260.50 had not absorbed the cuts either (Evercore $210, UBS $213, MS $235, RBC $250).
What would falsify this
A vendor that sources forward EPS from company guidance rather than analyst consensus would not exhibit the lag — but it would then be a different metric, and would disagree with every screen that uses consensus. Check which one a feed is serving before trusting either.
Distinct from [[pitfall-vendor-forward-eps-is-the-wrong-fiscal-year]]: that one is a persistent mislabelling of which year the estimate covers, visible at any time. This one is a transient lag in how current the estimate is, visible only right after a revision. Run the fiscal-year check first; if the year is right and the number still looks wrong, it is this.
Related
- [[pitfall-vendor-forward-eps-is-the-wrong-fiscal-year]] — run first; different failure.
- [[pitfall-forward-pe-above-trailing-pe-flags-an-inflated-base]]
- [[pitfall-dyt-inverts-when-price-caused-the-yield]] — same "signal strengthens as business weakens" shape.
- [[pitfall-spinoff-carveout-balance-sheet-persists-in-vendor-feeds]] — the other trap on HONA the same day.
- [[principle-primary-source-beats-vendor]]