Dollar index: an index that comprehensively reflects the exchange rate of the US dollar in the international foreign exchange market, and is used to measure the degree of exchange rate change of the US dollar against a basket of currencies. It measures the strength of the dollar by calculating the comprehensive rate of change of the dollar and a basket of currencies. (Excerpted from Baidu Encyclopedia)
Dollar index futures: the price of dollar index futures depends on the relationship between supply and demand. When people are bullish on the future US dollar index, they will buy US dollar index futures. If the supply is less than the demand, the futures price will rise. When people are bearish on the future US dollar index, they will sell futures and enter the US dollar index, which will lead to oversupply and falling prices.
When the new US dollar futures contract is launched, the futures price of the US dollar index is multiplied by the coefficient. After the listing of the new contract, people speculate on the future rise and fall of the US dollar index according to their own information, such as macroeconomic factors, interest rate levels and force majeure factors (disasters), and then trade in the market. Therefore, after the listing of US dollar futures, the price may seriously deviate from the US dollar index, which is a common phenomenon.