Cryptocurrency miner Argo Blockchain PLC - ADR (NASDAQ: ARBK) on Monday warned its shareholders of an imminent collapse if it failed to garner further financing, leading to its stock price nose-diving by over 50% amid a slump in the
Gainers
UserTesting, Inc. (NYSE: USER) shares jumped 91.7% to close at $7.40 after the company announced it will be acquired by Thoma Bravo and Sunstone Partners for $1.3 billion. The company also reported better-than-expected Q3 sales results.