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Card 728 of 10002026-09-06 issue

Observed arrival · 2026-09-06

Researchbook, an investing lab that publishes its failures

researchbook.dev Observed source
Editorial interest 84/100 Selection signal · not a rating of the site

A public research book for systematic investing techniques, with ideas preregistered, tested against real costs, and monitored or killed in the open.

Landing page captured for the 2026-09-06 issue.

Field notes

Researchbook uses a four-stage record: commit the hypothesis and kill criteria, test after accounting for spread, fees, tax, and latency, publish failures, then monitor survivors. Its atlas currently describes 92 techniques across 10 research areas, with 41 killed and 51 standing. The page also separates 13 kills with written reopen conditions from 28 without them, preserving the difference rather than smoothing it into a success narrative.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

OpenPublic substance visible
PrettyNotable craft visible
ProPolished or operationally mature
NicheUnusually specific use
ƒJavaScriptBrowser-side code central

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researchbook.dev

Landing page observed 2026-09-06. The live site may have changed.