恒生科技指数日内跌幅扩大至1%

Used to show that a price, index, or number rises or falls by a specific amount or percentage. In financial Chinese, 跌 and 涨 are very common verbs for market movement.

This pattern means the range or extent of a rise or fall becomes larger and reaches a certain level. 幅 is often used in finance to refer to the magnitude of change, and 扩大至 means 'expand to' or 'widen to'.

超 means 'more than' or 'exceeding'. In market reports, it is often placed before a percentage or number to show that the increase or decrease is greater than that figure.

获悉 is a formal written expression meaning 'to learn' or 'to be informed'. In news writing, it introduces information that has been learned from a source. The subject before 获悉 is often a media outlet or organization.

集体 means that a group performs the same action together. In financial reporting, it often describes several stocks or indices moving in the same direction at the same time.