A technical glitch at the New York Stock Exchange (NYSE) on Monday caused several high-profile stocks, including Berkshire Hathaway, to show a nearly 100% drop in value. The issue, linked to a recent upgrade of a key market data feed, triggered volatility trading halts for numerous companies such as Chipotle, Bank of Montreal, and Barrick Gold. Berkshire Hathaway's Class A shares plummeted 99.97% before trading was halted, resulting in a $628,800 loss. The NYSE has since resolved the issue and resumed normal trading. All erroneous trades during the glitch period are being canceled. The NYSE continues to investigate the root cause of the technical problem, which also impacted stocks like GameStop (GME) and was related to Limit Up-Limit Down (LULD) bands.