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How are futures indexes, such as pta index, set?
The calculation method is the weighted average of various contract prices.

There are many calculation rules. Let's give a simple example:

index =(p 140 1 * v 140 1+p 1402 * v 1402+p 1403 * v 1403+p 65438+。 v 1405+p 1406 * v 1406+p 1407+p 1408 * v 1408+p 1409 * v 1409+p 14 10 * v 65438...+V 14 12)

P stands for price, and V can be volume or position (you can choose according to your own requirements).

Commodity index based on commodity price has a history of nearly 50 years in the world. In this nearly half century, commodity index has played an extremely important role in commodity market and macroeconomic analysis and guidance.

The earliest commodity index is the futures price index compiled by the US Bureau of Commodity Research 1957 according to the prices of 22 basic economically sensitive commodities in the world market, usually referred to as CRB index. CRB futures contract 1986 is listed on New York Mercantile Exchange.

From 1980s to early 1990s, Goldman Sachs, Dow Jones and Standard & Poor's also launched their own commodity futures price indices, and introduced the method of weighted compilation to give corresponding weights to the commodity components in the indices. These indexes are Goldman Sachs Commodity Futures Price Index (GSCI), Dow Jones Commodity Futures Price Index (DJ-AIG) and Standard & Poor's Commodity Futures Price Index (SPCI), which are closely watched by the market.