现货白银跌幅扩大至超10%

Used to show that a number, range, or degree has grown and reached a new level. In news and formal writing, it often describes changes in data such as prices, losses, or influence.

达 means 'to reach'. 跌幅达…… is a common financial/news pattern meaning the amount of decline has reached a certain figure. It is used to emphasize the final level of a drop.

累计 means 'accumulated over a period of time'. It is often used before results, totals, gains, or losses to show that the number is not for one moment only, but for a whole period up to now.

In financial and news language, 报 is used after market data to mean 'was quoted at' or 'stood at' a certain price. This is a formal written usage common in reports about stocks, gold, silver, and exchange rates.

超 is a concise formal expression meaning 'to exceed' or 'more than'. In headlines and news reports, it is often used before numbers to show that a quantity goes beyond a certain point.