As the pricing currency of international crude oil price, the influence of US dollar on crude oil price is much higher than that of other currencies such as euro and Japanese yen. The changing principle of currency exchange rate will also affect the trend of crude oil price. Theoretically, when the dollar index weakens, crude oil denominated in dollars will be very cheap and demand will rise from the perspective of euro or yen; On the other hand, when the dollar appreciates, the price of crude oil denominated in euros or yen will be very expensive, and the demand for crude oil will decrease.

The relationship between the US dollar index and the international oil price is not static. Although there is a certain correlation between the two, this relationship is not always completely negative. The trend of the US dollar is influenced by many factors, including the US economic situation, global economic environment and geopolitics. The combination of these factors makes the relationship between US dollar index and international oil price complicated and changeable.

In addition, wb believes that it is also necessary to consider the impact of capital flows on the US dollar index and international oil prices. When a large amount of funds choose the US dollar as a "safe haven", these funds are likely to flow out of the international crude oil futures market. This capital flow will not only strengthen the dollar index, but also weaken the international oil price. Therefore, we can say that there is not a simple positive correlation or negative correlation between the US dollar index and the international oil price, but a combination of many factors.

Usually, the dollar index is negatively correlated with the price of gold. When the dollar index falls, the price of gold tends to rise. This is mainly because investors will turn to precious metal markets such as gold when seeking safe haven. With the increase of economic uncertainty, as a traditional safe-haven asset and value storage means, the attractiveness of gold will be greatly enhanced. Therefore, when the dollar index weakens, we can see a lot of money flowing into the gold market, thus pushing up the price of gold.