Dollar index (dollar index? USDX is an indicator 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 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.

The dollar index is not from Chicago Board of Trade (CBOT) or Chicago Mercantile Exchange (CME), but from new york Cotton Exchange (NYCE). New york Cotton Exchange was founded in 1870, which was originally composed of a group of cotton merchants and middlemen. At present, it is the oldest commodity exchange in new york and the most important cotton futures and options exchange in the world. 1985, new york cotton exchange established the finance department, and officially entered the global financial commodity market. The first is the US dollar index futures.