It replicates the S&P GSCI Total Return Index, which weights commodities by global production volume. It provides access to the physical asset market through futures contracts on roughly 20 major commodities.

It aims to diversify portfolios and defend against inflation, and it is particularly suited to investors who want to respond actively to energy price movements.

Launched by BlackRock (iShares) in 2006, it is a passively managed ETF that tracks an index.

Using a global production-weighted method, it allocates more to commodities that account for a larger share of the real economy. It maintains positions by rolling futures contracts forward, and liquid assets beyond the margin requirement are held in safe assets such as Treasuries.

• High energy sector exposure resulting from production weighting
• Tracks a benchmark index of the global commodity market

Assets under management (AUM) stand at $1.1B, and the expense ratio is 0.75% per year.

Compared with similar products such as DBC or COMT, its energy weighting is relatively higher, so it tends to react more sensitively to oil price swings.

It shows strong upward momentum when commodity prices rise on geopolitical risk and supply chain bottlenecks. During periods of recession concerns or a strong dollar, volatility tends to expand.

Fund flows are driven by demand for inflation hedging, and asset size fluctuates with shifts in market risk appetite. It serves as a representative liquidity channel for the commodity market.

Its hallmark is the diversification benefit of exposure to physical assets, but its energy concentration and high operating costs are risk factors.

The HGER, DBC and COMT shown in the table are commodity ETFs that use different weighting methods or futures rollover strategies, and their fee levels are either lower or higher than GSG. In particular, CERY and DJP are distinguished by roll yield management and an ETN structure, respectively. If you want cost-efficient exposure, PDBC or BCI can also be good alternatives, and if you prefer a more sophisticated strategy, COMB is also worth considering.

GSG is regarded as one of the traditional vehicles for investing in the commodity market. Before making an actual investment decision, please review the following key points carefully.

Sharp swings in energy prices and the structural costs unique to the futures market are the variables that affect returns. It is a useful tool for short-term inflation protection, but a cautious approach is needed for long-term holding.

It is a standard product suited to investors who need energy-centered commodity exposure. Allocating a portion of the portfolio to it is recommended to strengthen resilience against market volatility.