Historical review through 2026-07-10: Did the Oil Observation Establish Geopolitical Calm? Source-linked daily data, a five-observation comparison and explicit corrections.
The original 7.06% KOSPI decline is corrected to a 3.26% gain. A dated retrospective with source-linked closing observations and transparent calculations.
Historical review through 2026-05-13: Can an Oil Observation Identify a Diplomatic Concession? Source-linked daily data, a five-observation comparison and explicit corrections.
Historical review through 2026-05-09: Can a Price Table Quantify a Mispriced Supply Risk? Source-linked daily data, a five-observation comparison and explicit corrections.