United States Natural Gas Fund, LP (UNG)

UNG is a fund that buys natural gas futures contracts and lets people trade it like a stock. You cannot easily buy natural gas by itself — it trades in complicated futures markets. UNG solves that problem. You buy a share of UNG on a regular stock exchange, and that share represents a piece of the fund’s holdings of natural gas contracts. The fund was created in 2007 by a company called United States Commodity Funds, and it remains one of the easiest ways for an individual investor to gain exposure to natural gas prices.

Here is how it works. The fund sells shares to investors. That money goes into buying futures contracts for natural gas — agreements to buy a set amount of gas at a set future date. The fund holds those contracts and rolls them periodically, meaning it sells the contract that is about to expire and buys a newer one further out in time. The fund’s share price moves up when natural gas prices go up, and down when they fall. That is it. There is no business model, no revenue, no earnings. UNG is just a wrapper around natural gas futures that makes them easy to buy and sell.

The rolling problem

UNG faces one big challenge: rolling. When a natural gas futures contract is about to expire, the fund must sell it and buy a later one. The newer contract often trades at a different price than the one expiring. If newer contracts are cheaper (a condition called contango, which is common in natural gas), the fund loses money every time it rolls. Over months and years, this cost adds up and can reduce returns meaningfully compared to just owning the spot price of gas.

Imagine gas is trading at 4 dollars per unit today, but the contract that expires next month is worth 4 dollars while the contract expiring two months from now is worth 3.90 dollars. The fund sells the expiring contract at 4 dollars and buys the newer one at 3.90. That 0.10-dollar loss compounds with every roll. If it happens month after month, a fund that should track the price of gas ends up lagging it. In some recent years, UNG has lost money even while spot natural gas prices stayed roughly flat or rose, purely because of rolling costs.

The alternative would be to hold physical natural gas, but that is not practical. Gas is a gas. You cannot store it easily in a fund. So rolling is unavoidable.

Capital and volatility

UNG gets its capital from investors buying shares. Those dollars go into futures, and the fund’s assets are whatever those contracts are worth at any moment. There is no steady revenue, no profit margin, no business growth. The fund is completely dependent on natural gas prices.

Natural gas is volatile. It responds to weather (cold winters drive up heating demand), supply disruptions (hurricanes can damage production), and shifts in industrial and power-plant demand. UNG swings dramatically with those factors. In winter, when heating demand peaks, natural gas often rallies and UNG rises. In summer, demand falls and UNG typically declines. Beyond seasonal patterns, geopolitical events and changes in supply can trigger big moves. The fund amplifies all of that volatility into simple share-price movements.

What it costs

UNG charges an annual expense ratio to cover management and the costs of rolling futures contracts. That fee is deducted from returns before investors see them. The fund also has bid-ask spreads when you buy or sell shares, like any stock. Some providers of the fund also charge early-redemption fees if you buy and sell very quickly, a mechanism to discourage rapid trading.

How to research it

The prospectus for UNG (filed with the SEC under CIK 0001376227) explains the fund structure and the rolling schedule. The annual report shows historical performance relative to natural gas prices. Financial websites show UNG’s price alongside the Henry Hub natural gas price (the main benchmark for US natural gas), and you can see how closely they track. The difference between them is mostly due to rolling costs and the expense ratio. If you are thinking about owning UNG, comparing its returns to the underlying natural gas price over different time periods reveals whether the convenience of holding it in a brokerage account is worth the ongoing cost.