This commodity ETF tracks natural gas price movements by holding front-month natural gas futures and rolling them into the next month's contract before expiration. It gives direct exposure to natural gas price swings.

It suits active investors who want to bet on natural gas prices in the short term, or who want commodity exposure and are willing to accept high volatility and futures structure risk.

It is a passively managed (index-tracking) ETF run by US Commodity Funds.

The fund tracks natural gas price movements through a roll strategy, holding front-month natural gas futures and replacing them with the next month's contract before expiration. Depending on the shape of the futures price structure, costs or gains arise during the roll. As a result, the fund does not follow the spot price one for one, and the effect of the futures curve is reflected as well.

• Price tracking based on natural gas futures
• Front-month roll approach

Assets under management (AUM) stand at $498.6M, and the total expense ratio is 1.24% per year.

Compared with the crude oil futures ETFs USO and BNO, the main points of comparison are the underlying commodity and the characteristics of the futures curve.

Natural gas is a commodity whose price swings widely with weather, inventories, production, and demand, and it tends to surge or plunge when demand shifts abruptly, such as during cold snaps or heat waves. When the futures curve is in contango, costs arise during the roll, which can erode performance relative to the spot price.

Fund flows into natural gas futures products diverge sharply depending on the price outlook, seasonality, and the inventory environment, and short-term speculative money sometimes flows in when expectations of a price spike grow. It is also worth noting that performance can differ greatly depending on the futures curve and seasonality.

Direct exposure to natural gas prices is both its strength and its risk, and high volatility, futures roll costs, and unsuitability for long-term holding are the considerations.

For exposure through shares of natural gas producers, direct alternatives include FCG, and for spreading across multiple contract months to reduce the impact of rolling, products such as UNL are also worth comparing. For leveraged bets on natural gas, products such as BOIL can also be considered. The three products shown in the table, USO, BNO, and DBO, all invest in crude oil futures, so their underlying commodity is different. The differentiating factor for this ETF is its focused exposure to natural gas futures.

Here are the points to review before investing in UNG. Exposure to natural gas prices is its appeal, but high volatility, roll costs, and unsuitability for long-term holding need to be confirmed in advance. It is also a good idea to compare it with crude oil and producer-company products.

Sharp natural gas price swings driven by weather and inventories, along with roll costs from contango in the futures curve, are the main variables for performance, and the fund does not follow the spot price one for one. High volatility and roll costs can erode value over a long holding period, making it better suited to short-term trading.

It is a suitable candidate for risk-tolerant investors who want to bet on natural gas prices in the short term. For exposure through producer-company shares, products such as FCG are an option, and for direct exposure to natural gas futures, it is advisable to choose this product only after fully understanding its structure.