The US dollar index is an index that comprehensively reflects the US dollar exchange rate in the international foreign exchange market and is used to measure the degree of exchange rate changes of the US dollar against a basket of currencies. It measures the strength of the US dollar by calculating the comprehensive rate of change between the US dollar and a selected basket of currencies, thus indirectly reflecting the changes in US export competitiveness and import costs. If the dollar index falls, it means that the dollar depreciates against other major currencies. The calculation principle of dollar index futures is based on the trade settlement between major countries in the world and the United States, with 100 as the dividing line, and the overall strength of the dollar is calculated in a weighted way. After the launch of 1999 65438+ 10/Euro, the subject matter of the futures contract was adjusted from ten countries to six countries, and the euro became the most important and weighted currency, accounting for 57.6%. Therefore, the fluctuation of the euro has the greatest influence on the strength of the US dollar index.

Weight of Currency Index (%)

57.6 euros

13.6 yen

GBP 1 1.9

Canadian dollar 9. 1

Swedish krona 4.2

Swiss franc 3.6