Dex) is an index released by CBOE, an American financial research institution, to reflect the performance of the US crude oil futures market, so it is also called "crude oil futures index" and is an important indicator to reflect the performance of the crude oil futures market. XOP index is a comprehensive index released by CBOE on 2011,which reflects the performance of the US crude oil futures market, including price changes, trading volume and other related indicators. XOP index is a comprehensive index, which reflects the performance of the US crude oil futures market, including price changes, trading volume and other related indicators. XOP index is an important investment index, which can help investors understand the performance of the US crude oil futures market, so as to better grasp investment opportunities. The calculation method of XOP index is based on the price changes, trading volume and other related indicators in the US crude oil futures market, as well as the investment behavior of investors, and according to certain rules, the value of XOP index is obtained. XOP index can help investors to better grasp investment opportunities, so as to better achieve investment goals.