1, sudden major political time (spot asphalt not only has the properties of general commodities, but also has the properties of strategic materials, so it is influenced by political strength and political situation.

2. The outflow or inflow of hot money in the international capital market (when the investment opportunities in the global financial market are scarce, a large number of them flood into the international commodity market, especially the spot asphalt market, which inevitably pushes up the international oil price and seriously deviates from the fundamentals).

3. Changes in spot asphalt inventory (inventory is a buffer between supply and demand. When the futures price is higher than the spot, the commercial inventory will increase, which will stimulate the spot price to rise. On the contrary, it caused the spot price to fall).