The US Department of Commerce has issued a preliminary affirmative determination in an antidumping duty investigation into large-diameter graphite electrodes. According to reports from CNBC TV18, the preliminary dumping margin has been set at 12.22%, with a cash deposit rate of 9.88%. The latest regulatory filing dated September 22, 2026 confirms that this determination was formally received by Graphite India Limited on September 28, 2026. The investigation covered the period of investigation from January 1, 2025, through December 31, 2025, with the Department of Commerce calculating estimated weighted-average dumping margins for all exporters and producers not individually examined. The duties remain subject to a final determination, while the effective date has yet to be notified.
Graphite India Ltd. has stated that the financial impact of the preliminary determination cannot be ascertained at present, as reported by CNBC TV18. The company's shares ended 0.18% lower at ₹797.55 on Tuesday, with the stock maintaining a 23% gain for the year. Analysts estimate that exports to the US could account for around 5% of the company's total volumes, potentially limiting the direct impact of the development. The cash deposit rate of 9.88% provides some clarity on immediate compliance requirements, while the pending final determination and unspecified effective date leave room for potential changes in the final ruling.
The Department of Commerce has established three distinct rate categories for this investigation. Graphite India Limited received the highest rate of 12.22% with a cash deposit rate of 9.88%. HEG Limited was assigned a lower rate of 4.97% with a cash deposit rate of 1.15%. The remaining exporters and producers not individually examined fall under the all-others rate of 6.95% with a cash deposit rate of 3.53%. According to the Federal Register notice, Commerce calculated these rates using weighted-average dumping margins for examined respondents, excluding zero and de minimis margins. The all-others rate was determined based on publicly ranged sales data of mandatory respondents, providing a comprehensive framework for duty calculations across all market participants.
The notice from the US authorities represents a crucial phase in the regulatory proceedings, with no violations or contraventions currently alleged against Graphite India Limited. The preliminary dumping margin of 12.22% represents a significant development for the company, though the company's management has indicated uncertainty about the final financial impact. The effective date for the imposition of these duties has not yet been communicated, leaving the timeline for the additional financial burdens unclear. This latest move forms part of broader antidumping duty investigations aimed at managing and regulating the pricing practices associated with imports of specific products deemed to undermine domestic markets through unfair pricing. The investigation scope includes all large diameter graphite electrodes with nominal diameter exceeding 425 millimeters and graphite pin joining systems with minimum diameter of 228.6 mm.
