请问，股票涨停和跌停用英语怎么说？

daily fluctuation limit 每日波幅限额,无论上升或下跌至一限额便要停板.如香港是500点.
The daily fluctustion limit of Heng Seng Index is 500.
surged limit涨停
decline limit 跌停

Limit Up
The maximum amount by which the price of a commodity futures contract may advance in one trading day.

Limit Down
The maximum amount by which the price of a commodity futures contract may decline in one trading day.

Hopefully it helps.

1)Stock trading surged to their daily trade limits
2)Stock indices

up
down