CIT sustains Commerce's fourth remand redetermination in welded line pipe investigation on Korea

The U.S. Court of International Trade sustained Commerce's fourth remand redetermination in the 2015 less-than-fair-value investigation of welded line pipe from the Republic of Korea, in Stupp Corp. v. United States, Slip Op. 26-113, Consol. Court No. 15-00334, dated September 15, 2026. On remand Commerce replaced the Cohen's d test with a two-percent price difference test to determine whether prices differ significantly, and abandoned its mixed methodology in applying its ratio test. The court held the price difference test reasonable and found Commerce acted within the scope of remand.