Case 005 · Buybacks & SEC Rule 10b-18
Open prompt
What’s the deal with corporate stock buybacks? Why have they become so common?
Targeted prompt
How did SEC Rule 10b-18 (1982) change corporate stock buyback practices in the US?
Volunteer Gap · 2.50
Three of four frontier models discussed corporate buyback practices on the open prompt without mentioning SEC Rule 10b-18 — the 1982 regulation that established the modern buyback framework. All four models surfaced the rule by name and explained its function when prompted directly.
Earlier case records include Case 006 (NATO Expansion, gap 2.00) as a parallel structural omission, Case 003 (Palantir / ICE) as a cross-tier methodological demonstration, and Case 013 (OxyContin, gap 0.75) as the strongest control validation.