(v) (of stock / share prices) to rise suddenly and very steeply - (o ceachakcji) iść gwałtownie w górę
Railroads have rocketed and are sky-high now. They seem to be at their peak. , (v) (of sales) to increase sharply - (o sprzedaży) pójść ostro w górę
They will never tell you why the sales of their goods have suddenly rocketed, because it is their trade secret.