Shares of Lithium Americas Corp. (LAC) plummeted 5.09% during Monday's trading session following a significant downgrade by Scotiabank. The financial institution lowered its rating on LAC from Sector Perform to Sector Underperform, triggering a sell-off among investors.

The downgrade comes at a crucial time for Lithium Americas, which has recently been in the spotlight due to its strategic partnerships and government backing. Just last week, the company announced a landmark agreement with the U.S. Department of Energy (DOE) and General Motors, securing a $435 million first draw on a previously announced $2.26 billion DOE loan for the development of the Thacker Pass lithium project in Nevada. This deal, which some analysts had hailed as a "game changer," gave the DOE a 5% equity stake in Lithium Americas and a 5% stake in the joint venture with GM.

Despite the recent positive momentum, which saw LAC's stock surge over 200% in the past month, today's downgrade has dampened investor enthusiasm. The sharp decline underscores the volatile nature of the lithium market and the sensitivity of mining stocks to analyst ratings. Investors will be closely watching for any further analyst comments or company updates that might provide more context to Scotiabank's bearish stance on Lithium Americas.