Fern Quarterly
The quarterly, with its work shown.
Final-cost and input indices, margin dynamics, geopolitical risk transmission, and the tariff landscape with stage-of-input math. Free, web-first, sourced.
June 2026
Q2 2026
Section 232 at 50%, the Strait of Hormuz disruption, and what both actually land as after the stage-of-input ladder. Plus the seven principles behind every Fern number.