A sharp rise refers to the situation that the price index of the securities market or the contract price of the futures market rises extremely quickly in a short period of time, which is characterized by short rising time, fast rising speed and large rising range. A sharp increase will have two opposite consequences. On the one hand, it will cause huge losses to short sellers in the market, on the other hand, it will bring greater profits to long sellers in the market.

The sharp rise occurred when the strength contrast between the long and short sides of the market changed obviously. The strength contrast between the long and short sides mainly depends on the financial strength of the long and short sides and the advantages and disadvantages of market fundamentals and technologies. Therefore, the sharp rise is generally because the financial strength of many parties is far greater than that of the empty side, or because there are obvious advantages in fundamentals and technology.