The Herfindahl-Hirschman Index is a 0-to-1 measure of supplier concentration on a sourcing lane, where 1 is a single-source monopoly. PharmaDB computes it on every (molecule, origin country, destination country) triple in the warehouse and surfaces it as the first risk-check before any sourcing decision. The view that backs this page is lane_competitiveness; the source table is molecule_country_flow. Refresh cadence is weekly.