** Shares of Australia's Nickel Industries NIC.AX tumble 27.8% to A$0.545; hit lowest since January 23, 2024
** Stock slumps after Reuters reported that Indonesia is considering raising royalties paid by mining companies from commodities like coal, nickel and copper, among others
** NIC operates a big portfolio of mining and downstream nickel processing assets in Indonesia
** NIC has several key assets in Indonesia, including the Hengjaya Mine and multiple rotary kiln electric furnace (RKEF) projects
** Stock down 28.5% YTD
(Reporting by Rishav Chatterjee in Bengaluru)
((Rishav.Chatterjee@thomsonreuters.com))