What is the Commodity Index?
A commodity index is anof the prices of items such as wheat, corn, soybeans, coffee, sugar, cocoa, hogs, cotton, cattle, oil, natural gas, aluminum, copper, lead, nickel, zinc, gold and silver.
How Does the Commodity Index Work?
The Goldman Sachs Commodity Index (GSCI is weighted according to the global production levels of a variety of commodities. All of the commodities in the are physical commodities; no financial commodities are allowed. (There are commodity indexes exclusively for financial commodities.)) is one of the most popular commodities indexes. Owned by Standard & Poor’s, the
The index was is normalized to a value of 100 on January 2, 1970, in order to permit comparisons of commodities prices over time. To ensure continuity, sometimes the index adjusts via a "normalizing constant" when the weights of the underlying commodities change. The value of the GSCI on each business day is therefore equal to the total dollar weight of the GSCI divided by the normalizing constant.
Why Does the Commodity Index Matter?
Commodities are raw materials used by virtually everyone. The orange juice on your breakfast table, the gas in your car, the meat on your dinner plate and the cotton in your shirt all probably interacted with a commodities exchange at one point. Commodities-exchange prices set or at least influence the prices of many goods used by companies and individuals around the globe. Changes in prices can affect entire segments of an , and these changes can in turn spur political action (in the form of subsidies, tax changes or other policy shifts) and social action (in the form of substitution, innovation or other supply-and-demand activity). A commodities is one way to track the changes in the prices of these important items.
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