Lithium Carbonate Futures Fall Over 20% in September, Down 40% From May Peak

The scale of the drawdown matters less than the mix of drivers behind it: soft demand signals from battery makers, a technical change in how inventories are reported, and macro rate expectations are pulling in the same direction at once. That combination makes it hard to isolate how much of the move reflects real physical oversupply versus sentiment and positioning. For producers, the erased year-to-date gains shift the conversation from margin expansion back to cost discipline. The open question is whether the inventory-reporting change proves a one-off distortion or a lasting reset in how the market reads stock levels.