From Grok:

The post reports a rare full halt in trading across all London Metal Exchange (LME) contracts, including copper, aluminum, zinc, and tin, starting around 2:40 PM GMT on March 16, 2026, due to an unspecified technical issue preventing order placements and price updates.

This disruption echoes past LME incidents, such as the 2022 nickel market chaos from extreme volatility and systems errors, but current reports indicate no prior price swings, suggesting a routine glitch rather than fundamental market stress.

Traders are shifting to alternative venues like the Shanghai Futures Exchange for hedging, potentially causing short-term liquidity strains and volatility upon resumption, though physical metal supplies remain unaffected.