“股市下跌”常见的英文表达有：
Stock market decline： “decline”表示下降、衰退，“stock market decline” 即股市下跌，这种表达较为正式、通用。例如：The stock market decline has caused widespread concern among investors.（股市下跌引起了投资者的广泛担忧。）
Stock market fall： “fall”同样有下降、跌落的意思，“stock market fall”也是描述股市下跌的常用说法。例如：A sharp stock market fall occurred yesterday.（昨天股市出现了大幅下跌。）
Stock market slump： “slump”有暴跌、骤降之意，强调下跌的幅度较大且迅速，“stock market slump”侧重于描述股市急剧下跌的态势。例如：The stock market slump has led to a significant drop in asset values.（股市暴跌导致资产价值大幅下降。）