S&P Dow Jones Indices has announced the composition and weights of the S&P GSCI Index for 2018. The S&P GSCI is a world production-weighted commodity index tracked by two US-listed ETFs. In 2018, the index will be composed of 24 exchange-traded futures contracts on physical commodities across five sectors – energy, industrial metals, precious metals, agricultural and livestock.

The broad commodity index is world-production weighted.

2018 will see energy commodities remain the largest sector in the index making up 58.6% of the weight, up from 56.2% in 2017. The next largest sector, agriculture, will have its weight cut from 19.9% this year to 18.3% in 2018. The rebalance will also see industrial metals increase to 10.9%, livestock will drop to 7.5%, and precious metals remain relatively stable at 4.7%.

The most notable rebalance for a single commodity within the index is to WTI crude, the largest single component, which will increase in weight from 22.8% this year to 24.7% in 2018. Full details of the individual and sector weights can be found in the tables below.

There are two ETFs which track the index directly, the iShares S&P GSCI Commodity-Indexed Trust (GSG US) and the iPath S&P GSCI Total Return Index ETN (GSP US). The BlackRock product has $1.3 billion in assets with an annual fee of 0.75%, while GSP has $23m in assets with an annual fee of 0.70%.

The S&P GSCI has returned 13.1% in the 12 months to 9 November 2017.

Source: S&P Dow Jones indices