Decision Alpha.
The quarterly index of strategic decision quality. A sector-level benchmark computed from the same 30+ bias taxonomy Decision Intel applies to every memo.
Published quarterly. Free to cite. Drawn from public earnings-call transcripts, SEC filings, and investor-day disclosures across the FT 500, FTSE 350, and S&P 500.
Sector Index — Q2 2026
Aggregate Decision Quality Index by sector. 100 = Kahneman-level deliberation. 0 = the WeWork S-1.
Historical Leaderboard
The six worst-scoring public corporate decisions of the last 50 years. Each was auditable, in retrospect, from documents that existed at the time.
Methodology
Inputs
Public earnings-call transcripts (last 4 quarters), SEC filings (10-K, 10-Q, 8-K), and investor-day disclosures. Strategic posture signals only — never customer data.
Bias detection
The Decision Intel 30+ bias taxonomy (DI-B-001 through DI-B-020 core + toxic combinations). Same scoring model that audits client memos — applied symmetrically to public disclosures.
DQI formula
Weighted composite of bias density, compound interactions, noise (three-judge variance), and narrative clarity. 100 = Kahneman-level deliberation. 0 = the WeWork S-1.
Publication
Quarterly, always within 30 days of sector earnings cycle close. Prior quarters archived for time-series analysis. Revisions are annotated; never silently updated.
Cite this index
Decision Intel. (2026). Decision Alpha Index, Q2 2026. Retrieved from decision-intel.com/decision-alpha.
Reuse under CC-BY 4.0. Attribution to Decision Intel required. No editorial permission needed.
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