by Avaronah
Title says it. According to Citi, one of their traders made caused a transaction error which they discovered soon after. It caused Scandinavian indices to plummet as much as 8% in a matter of minutes. Such errors are called fat-finger error; a typo. Flash crashes like these make me wonder how much money banks trade on a daily basis.
Source: https://www.theguardian.com/business/2022/may/03/citigroup-trader-error-flash-crash-markets-falls