Editing Commodity price index (section)

== History ==
The first index to track commodity futures prices was the Dow Jones futures index which started being listed in 1933 (backfilled to 1924). <ref>{{cite SSRN|title=The First Commodity Futures Index of 1933 | date=19 September 2019 |ssrn = 3451443| last1=Bhardwaj | first1=Geetesh | last2=Janardanan | first2=Rajkumar | last3=Rouwenhorst | first3=K. Geert }}</ref> The next such index was the [[Thomson Reuters/Jefferies CRB Index|CRB ("Commodity Research Bureau") Index]], which began in 1958. Due to its construction both of these were not useful as an investment index. A later practically investable commodity futures index was the [[Goldman Sachs Commodity Index]], created in 1991 and known as the "GSCI".<ref name="bub">"The Food Bubble", Frederick Kaufman, Harper's, 2010 July</ref> The next was the Dow Jones AIG Commodity Index. It differed from the GSCI primarily in the weights allocated to each commodity. The DJ AIG had mechanisms to periodically limit the weight of any one commodity and to remove commodities whose weights became too small. After AIG's financial problems in 2008 the Index rights were sold to UBS and then to Bloomberg and it is now known as the Bloomberg Commodity Index. Other commodity indices include the Reuters / CRB index (which is the old CRB Index re-structured in 2005) and the Rogers Index.

In 2005 Gary Gorton (then of Wharton) and Geert Rounwehorst (of Yale) published "Facts and Fantasies About Commodities Futures", which pointed out relationships between a commodities index and the stock market, and inflation.<ref name="bub"/> They were both employed as consultants to AIG Financial Products (AIG-FP), which was responsible for managing the DJAIG Index. Gorton's other role was to provide AIG-FP with the mathematical modelling expertise underpinning the construction of "Super-Senior" credit derivatives linked to mortgage-backed securities so as to ensure AIG was not exposed to risk of loss.