Nickel +14.97%: LME cancels nickel trades againMarch 23, 2022 – For the fourth time since nickel trading had to be restarted on the London Metal Exchange (LME), an incident referred to by the LME as a Price Disruption Event has occurred. As the LME officially announced on its website on March 23, 2022, all trades agreed in the relevant ring session (R2) will be annulled. Source