Sigma Lithium Corporation's stock surged 10.48% in pre-market trading on Wednesday, marking a significant upward movement for the lithium producer.

The sharp gain follows an announcement from Zimbabwe that it has imposed an immediate suspension on exports of lithium concentrate and raw ore. This policy move, aimed at promoting local mineral processing, is expected to tighten global lithium supply and benefit established producers outside Zimbabwe. The news article specifically noted that US-listed lithium mining stocks strengthened following the announcement, with Sigma Lithium being highlighted among the gainers.