1, sudden major political events;

2. Changes in interest rates (if interest rates increase, capital investment will decrease, resulting in smaller initial mining scale; High interest rates will also increase the capital cost of alternative technologies, leading to a decline in mining speed);

3. Exchange rate changes (asphalt price changes have a negative correlation with the exchange rate changes of the US dollar and major international currencies, and the rise of the US dollar puts pressure on asphalt settled in US dollars. When geopolitics is in turmoil, asphalt is positively related to the US dollar, and the two complement each other);

4. Changes in oil inventory (inventory is a buffer between supply and demand. When the futures price is higher than the spot price, the commercial inventory will increase, thus stimulating the spot price to rise. On the contrary, it will cause the spot price to fall);

5. Tax policy (with the increase of tax, the net profit of asphalt mining will decrease, and the enthusiasm during mining will also decrease accordingly. And taxes will reduce the return on investment of newly discovered reserves). The main influence is the international situation, such as international market supply and demand, war and so on. Now the supply exceeds demand in the international market, so the current price is very low.

Can you ask the old teacher in this field any questions? 57,37,8,27.58 would be better.