** Novonix NVX.AX soars as much as 21.3% to A$0.57, highest since May 16
** Stock marks steepest intraday pct gain since end-November 2024; set for best weekly pct rise since late January 2021
** Battery materials and technology firm welcomes U.S. Commerce Department's move to impose 93.5% anti-dumping tariffs on Chinese graphite, taking the effective duties to 160%
** Plans to significantly increase U.S. graphite production
** CEO says, "It affirms our business strategy as well as the diversification strategy of our customers to source critical battery materials and components locally"
** Stock sees busiest session since January 20, with ~25 mln shares traded vs 30-day avg of 3.6 mln
** YTD, NVX falls 25.9%
(Reporting by Anjali Singh in Bengaluru)
((anjali.singh2@thomsonreuters.com;))