Natural Gas Basics

BOIL is the ProShares Ultra Bloomberg Natural Gas ETF. It provides 2x daily leveraged exposure to natural gas futures, specifically the Bloomberg Natural Gas Subindex. If the front-month natural gas futures contract rises 3% in a day, BOIL aims to rise roughly 6%.

Daily Reset and Compounding

Like all leveraged ETFs, BOIL resets its leverage ratio every day. Over periods longer than one day, returns can deviate significantly from a simple 2x multiple of natural gas prices due to the effects of daily compounding. In trending markets this can amplify gains, but in choppy or range-bound markets it tends to erode value over time.

Contango and Roll Yield

BOIL holds natural gas futures, not physical gas. Futures contracts expire monthly, so the fund must regularly "roll" from the expiring contract to the next one. When the market is in contango (later months priced higher than the front month), this roll costs money. Over time, contango drag is one of the largest sources of decay in BOIL's price.

When Does BOIL Perform Best?

BOIL tends to perform best during sharp, sustained moves higher in natural gas prices — typically driven by cold weather events, supply disruptions, or storage deficits. It is a tactical instrument designed for short-to-medium-term directional trades, not a long-term buy-and-hold investment.

Every Thursday at 10:30 AM ET, the U.S. Energy Information Administration (EIA) releases its Weekly Natural Gas Storage Report. This report shows the net change in underground natural gas inventories held by utilities and operators across the Lower 48 states.

Why It Matters

Natural gas is a supply-and-demand commodity. Storage levels are the single best real-time indicator of the supply/demand balance. When storage is below the 5-year average, it signals tighter supply conditions and tends to be bullish for prices. When storage is above average, the market has a cushion and prices tend to soften.

The Consensus Game

The actual number matters less than how it compares to analyst expectations. A withdrawal of 100 Bcf sounds large, but if the market expected 120 Bcf, that's a bearish miss. The price reaction is driven by the surprise, not the absolute value.

Injection Season vs Withdrawal Season

• Injection season (April – October): Utilities add gas to storage. Reports show positive numbers (injections).
• Withdrawal season (November – March): Heating demand pulls gas out of storage. Reports show negative numbers (withdrawals).

The transition points between seasons are often when the market reprices expectations most aggressively.

Heating Degree Days (HDD) measure how cold a day is relative to a 65°F baseline. If the average temperature for a day is 35°F, that day has 30 HDD (65 − 35 = 30). The colder it gets, the higher the HDD number.

Why HDD Drives Natural Gas Demand

Roughly half of all U.S. homes are heated with natural gas. When temperatures drop, furnaces run longer and gas consumption rises. HDD is the standard proxy for this relationship — higher HDD means more heating demand, which draws more gas out of storage and puts upward pressure on prices.

Forecasts Move the Market

Traders watch weather forecasts 1–2 weeks out. If the forecast shifts colder (higher HDD than previously expected), natural gas prices tend to rally in anticipation. The reverse happens when forecasts warm up. The change in the forecast often matters more than the absolute temperature level.

HDD vs CDD

In summer, the equivalent metric is Cooling Degree Days (CDD), which tracks how warm it is above the 65°F baseline. Natural gas also powers many electricity plants used for air conditioning, so extremely hot summers can also be bullish for gas demand.

Contango is when futures contracts for later delivery months are priced higher than the current (front) month. This is the natural state for natural gas most of the time, because storing gas has real costs (injection, maintenance, insurance).

The Roll Cost Problem

ETFs like BOIL hold futures contracts, not physical gas. Each month the fund must sell the expiring contract and buy the next one. If the next month's contract is priced higher (contango), the fund effectively sells low and buys high. This "roll cost" steadily erodes the fund's value even if spot natural gas prices stay flat.

Backwardation: The Opposite

When near-term prices are higher than later months, the market is in backwardation. This typically happens during supply crunches or cold weather emergencies when immediate demand outpaces supply. In backwardation, rolling futures actually generates a positive return, which benefits BOIL holders.

Practical Implications

• In contango-heavy markets, holding BOIL for weeks or months can result in significant losses even if natural gas prices are stable.
• Timing trades around contango is essential for managing risk in leveraged gas products.
• The steepness of the contango curve (not just its existence) determines how much damage the roll does.

The storage flip level is the storage threshold (in Bcf) where BOIL's average monthly return historically flips from positive to negative. It is computed from years of EIA storage data and corresponding BOIL returns.

How It Works

For each month, the dashboard examines every historical storage level and calculates BOIL's average return at that level. The flip level is the point where this average crosses zero. When current storage is below the flip level, historical returns have been positive on average (bullish). When storage is above the flip level, returns have been negative (bearish).

Monthly vs Weekly

The dashboard shows two flip levels: one based on monthly storage averages and one based on weekly EIA report data. Both tell the same story from different time horizons. The weekly version is more granular and responsive to recent changes.

How to Use It

Think of the flip level as a supply/demand equilibrium. It does not predict the future, but it frames where you stand relative to historical norms. If current storage is well below the flip, the supply picture has historically been bullish for BOIL. If well above, the opposite.

Natural gas is one of the most seasonal commodities. Its price is heavily influenced by weather-driven demand cycles that repeat annually, though the magnitude varies year to year.

The Annual Cycle

• Winter (Nov – Feb): Peak heating demand. Prices tend to be highest and most volatile. Cold snaps can cause sharp rallies.
• Shoulder months (Mar – Apr, Sep – Oct): Transition periods with lower demand. Prices often soften as heating season ends or before it begins.
• Summer (May – Aug): Demand comes from gas-fired electricity for air conditioning. Hot summers can surprise to the upside, but overall demand is lower than winter.

Storage Builds the Narrative

During injection season, the market watches whether utilities are adding gas fast enough to reach comfortable levels before winter. If injections lag, prices tend to firm up in late summer. If injections run ahead of schedule, it signals abundant supply and prices weaken.

Trading Implications

Seasonal patterns provide a baseline expectation, not a guarantee. The biggest moves happen when actual conditions deviate from seasonal norms — an unexpectedly warm winter, an early cold snap, or a summer heatwave that depletes gas faster than expected.

When people reference "the price of natural gas," they could mean several different things. The key contracts to understand:

NG1 (Front Month Futures)

NG1 is the nearest-expiring NYMEX natural gas futures contract. This is the most actively traded contract and is what most people mean when they say "the price of natural gas." It reflects near-term supply and demand expectations and is the most sensitive to weather forecasts and storage reports.

NG2 (Second Month Futures)

NG2 is the next contract after NG1. It typically trades at a slight premium or discount to NG1 depending on seasonal expectations and the contango/backwardation structure. BOIL tracks an index that rolls between these contracts, so the spread between NG1 and NG2 directly affects BOIL's roll cost.

Henry Hub Spot Price

The Henry Hub spot price is the physical delivery price at the Henry Hub in Louisiana, the benchmark pricing point for U.S. natural gas. Spot prices reflect immediate, real-time supply and demand but are less relevant for futures-based trading.

Why It Matters for BOIL Traders

BOIL's returns are driven by futures, not spot prices. Understanding the spread between NG1 and NG2 helps you estimate the cost of rolling positions and whether contango or backwardation is helping or hurting the fund.