noun, noun or participle which takes 'suru', intransitive verb
sudden rise; sharp increase; surge; jump
Primarily used for rapid price increases in financial markets, but can also describe sudden spikes in other measurable quantities. Often contrasted with 急落 (sudden drop).
See also: 急落
原油価格が急騰した。
Crude oil prices surged.
株価の急騰で投資家は喜んだ。
Investors were pleased by the sharp rise in stock prices.