ProShares Ultra Energy (DIG)

ProShares Ultra Energy is an exchange-traded fund that bets on energy stocks getting bigger in value. It uses borrowed money to double down on the bet. When energy stocks go up, you make twice as much. When they go down, you lose twice as much. This is not a boring index fund that you buy and hold for thirty years. It is a trading tool.

How the fund works

Think of DIG as a turbocharger on the energy sector. Energy companies pump oil, drill for natural gas, refine fuel, and build solar and wind systems. These companies trade as stocks on exchanges. Most people buy an energy fund and hold it for years. DIG works differently. Each day, the fund’s managers use borrowed money to take a bigger bet on energy than they would have with just the cash investors gave them. The goal: deliver twice the daily return of the energy index.

If the energy sector goes up 1% in a day, DIG aims to go up 2%. If it goes down 1%, DIG aims to go down 2%. The “daily” part is important. The fund resets this leverage every single day. This reset mechanics matter, and they create a quirk that catches people off guard.

The daily reset quirk

Here is where leverage gets weird. Imagine energy stocks bounce around over a month: up 1%, down 1%, up 1%, down 1%, and so on. Over the month, they end up roughly flat. But a 2x leveraged fund does not end up flat. Why? Because the leverage resets every day.

If the energy index is at 100 and goes up 1% (to 101), the leveraged fund aimed to go up 2% and sits at 102. Perfect. But the next day, the leverage resets. The index is now at 101. If it goes down 1%, the index falls to 100 (back where it started). But the leveraged fund, starting from 102, falls 2% to just under 100. So even though the index came back to its starting point, the leveraged fund lost money. This is called volatility decay. In a choppy sideways market, volatility decay eats returns. In a trending market (up or down consistently), the leverage helps.

What you are really buying

DIG owns energy sector stocks—oil majors, shale producers, pipeline operators, refiners, and increasingly renewable-energy companies. The fund holds actual companies: ExxonMobil, Chevron, ConocoPhillips, smaller independent producers, and others. It does not own oil futures or oil itself. The leverage comes from borrowing money to buy more of these stocks than the fund’s assets would normally allow. If energy stocks rise, leverage amplifies the gain. If they crash, leverage amplifies the loss. There is nothing magical here. It is simple multiplication with borrowed money.

Size and concentration

Energy is a real sector of the real economy. People drive cars, heat homes, and power factories. Energy demand is material. The sector includes oil and gas (which still dominate), but increasingly also renewables like wind and solar. A fund that bets 2x on energy is betting on all of this at once. The fund moves in size because the energy sector itself moves in size. Oil price swings move the whole fund up or down faster than a non-leveraged energy fund would.

The real risks

This is the simple one: if energy goes down, DIG loses twice as fast. In a bear market for energy—say, a recession where crude demand collapses—a leveraged fund can lose 40%, 50%, even more. Investors who are not prepared for that kind of swings should not own this fund. Period.

The second risk is volatility decay. If the market chops around instead of trending, the daily resets work against you. You lose money not from the sector declining but just from the randomness of up-and-down days. This is hard to predict. You have to watch the fund and understand that holding it in a flat or choppy market is like paying for something you are not getting.

The third risk is that you will hold it too long. DIG is not meant to be a buy-and-hold for years. It is meant for traders who think energy will go up soon and want amplified exposure for days or weeks. If you hold it for years while the energy sector meanders sideways, volatility decay and daily resets will erode your returns even if your prediction about the direction was right.

Who uses this fund and how

DIG appeals to traders and active investors who want to amplify bets on the energy sector in the near term. You use it when you think oil prices are about to spike, when crude demand is surging, or when energy stocks are about to rally. You do not use it for a portfolio that sits untouched for a decade. You do not use it to replace a boring energy index fund. You use it to make a directional bet with extra firepower.

Sophisticated investors sometimes use it to hedge other bets or to build complex strategies. Retail traders use it because the leverage appeals to the fantasy of making big gains. Most people should avoid it entirely because holding leveraged funds is harder than it looks and the decay is real.

Costs and daily mechanics

DIG charges an expense ratio to cover costs of the borrowing, the daily rebalancing, and the fund management. This is higher than a boring non-leveraged energy fund because the fund has to borrow and rebalance every single day. The fund trades on an exchange just like any stock or ETF. You can buy it in the morning and sell it at noon. You can hold it overnight, but overnight the leverage resets and the new day’s leverage is calculated fresh. Distribution of energy sector dividends flows through to shareholders, though the focus of a leveraged fund is price return, not income.

How to research the fund

Look at the prospectus and read it carefully. Understand the daily reset mechanics and how volatility decay can damage returns over time. Back-test the fund against the energy sector in different market conditions—months of steady rallies, months of choppy sideways trading, sharp crashes. See how it actually performed. Compare it to a non-leveraged energy fund and ask yourself: is the extra complexity and the risk of decay worth the upside amplification? Paper-trade it first if you are unsure. Do not use money you cannot afford to lose. Most important: know your exit plan before you buy. Leveraged funds work best when you have a clear reason to hold them for weeks or months, not years.