股票涨幅的英文翻译是 "stock price increase" 或 "stock price gain." 例句：

The stock price increase was a result of strong earnings reports.
The stock price gain was unexpected given the current market conditions.

注意，在股票市场中，涨幅通常指股票价格在一段时间内的变化。例如，在一天内，股票价格可能会上涨或下跌。因此，如果你想要指出股票在一段时间内的涨幅，你可以使用短语 "stock price increase over time" 或 "stock price gain over time"。例如：

The stock price increase over the past month was significant.
The stock price gain over the past year was impressive.

希望这些信息对你有帮助！