Back Month Contract
What Is a Back Month Contract?
A back month contract (also known as a deferred month contract) is any futures or options contract with an expiration date further in the future than the current "front month" contract. While the front month contract typically attracts the most trading volume and reflects the current spot price, back month contracts are essential for long-term hedging, price discovery, and speculating on the future term structure of the market.
In the futures and options markets, contracts are not perpetual; they have specific expiration dates. The contract with the closest expiration date is known as the front month or spot month. It typically captures the majority of trading activity and serves as the benchmark for the current market price. Any contract that expires after the front month is referred to as a back month or deferred month contract. For example, if the current month is January, the February crude oil contract might be the front month. The March, April, May, and December contracts—and any contracts for years into the future—are all considered back month contracts. Back month contracts serve a critical function in the financial ecosystem: price discovery over time. They allow market participants to see what the market believes an asset will be worth at a specific point in the future. This "term structure" or "futures curve" provides vital information. For instance, if the price of wheat for delivery in December (post-harvest) is significantly lower than the price for delivery in July (pre-harvest), it signals expectations of a bountiful crop easing supply constraints. These contracts are primarily used by two groups: hedgers and spread traders. A hedger, such as an airline, might buy back month oil contracts to lock in fuel prices for the upcoming summer travel season. A spread trader might simultaneously buy a back month and sell a front month to speculate on the relationship between the two prices changing.
Key Takeaways
- Back month contracts are all futures contracts expiring after the nearest (front) month.
- They typically have lower liquidity and wider bid-ask spreads compared to the front month.
- Prices of back month contracts reflect the "cost of carry" and market expectations for future supply and demand.
- A market is in "Contango" when back months are more expensive than the front month.
- A market is in "Backwardation" when back months are cheaper than the front month.
- Traders use "calendar spreads" to trade the price difference between front and back months.
How Back Month Pricing Works
The price of a back month contract is rarely the same as the front month. The difference is determined by the Cost of Carry model and market sentiment. The theoretical price of a futures contract is calculated as: Future Price = Spot Price + Cost of Carry The "Cost of Carry" includes: 1. Storage Costs: The cost to physically store the commodity (e.g., warehousing oil or gold). 2. Insurance: The cost to insure the asset while in storage. 3. Interest (Financing): The interest paid on the money used to buy the asset. 4. Convenience Yield: An implied benefit of physically holding the asset now (which reduces the future price). When the cost of carry is positive (normal for non-perishable commodities like Gold), back month contracts trade at a premium to the front month. This market structure is called Contango. The price curve slopes upward over time. When there is a shortage of the asset in the spot market, the "convenience yield" spikes—people are willing to pay a premium to have the asset *now* rather than later. This causes the front month price to be higher than the back month price. This market structure is called Backwardation. The price curve slopes downward.
Trading Liquidity and Volume
A critical practical consideration for traders is liquidity. The front month contract almost always commands the lion's share of volume and open interest. As you look further out into the back months, liquidity tends to "dry up." For example, the S&P 500 E-mini futures front month might trade 1.5 million contracts a day with a bid-ask spread of 1 tick ($12.50). A back month contract expiring 9 months later might only trade 5,000 contracts a day with a spread of 4 or 5 ticks. This lack of liquidity creates slippage risk. If a trader needs to enter or exit a large position in a deferred month, they may move the market price significantly or pay a large premium to get the order filled. Consequently, short-term speculators usually stick to the front month, while back months are the domain of institutional hedgers and long-term position traders.
Step-by-Step: Rolling a Position
Because futures contracts expire, holding a long-term position requires "rolling" from the front month to a back month.
Real-World Example: Natural Gas Seasonality
Natural Gas futures exhibit strong seasonality, affecting the relationship between front and back months.
Advantages of Back Month Contracts
1. Long-Term Hedging: They allow producers and consumers to secure prices for goods that won't be produced or needed for many months, providing budget certainty. 2. Reduced Volatility: Back month contracts are often less volatile than the front month. They are less sensitive to immediate, temporary supply disruptions (like a refinery fire) and more focused on long-term fundamentals. 3. Spread Opportunities: They enable "calendar spread" trading, which allows traders to profit from changes in supply/demand dynamics without taking a naked directional risk on the price. 4. Tax Efficiency: In some jurisdictions, holding longer-dated contracts can offer different tax treatments, though this varies by region.
Disadvantages and Risks
1. Liquidity Risk: The most significant risk. Low volume in back months means wider bid-ask spreads (higher transaction costs) and the potential inability to exit a trade quickly during a panic. 2. Negative Roll Yield: For long-term investors in markets that are in Contango (like VIX futures or often Natural Gas), constantly rolling into more expensive back month contracts erodes capital over time. This is why many commodity ETFs underperform the spot price of the commodity. 3. Price Insensitivity: A back month contract may not react to news as expected. A shortage today might send the front month skyrocketing, but the back month might barely move if the market expects the shortage to be resolved quickly.
Common Beginner Mistakes
Avoid these pitfalls when trading deferred months:
- Ignoring Liquidity: Placing a "Market Order" in an illiquid back month contract. You might get filled at a terrible price far away from the last trade.
- Misunderstanding the Curve: Buying a back month contract solely because it looks "cheaper" than the front month (Backwardation) without understanding that it reflects a fundamental expectation of falling prices.
- Forgetting to Roll: Holding a position too close to expiration and being forced to close it out at an unfavorable time or facing delivery procedures.
- Overlooking Spreads: Trading a back month outright when a calendar spread (hedged against the front month) would have been a safer way to express the view.
FAQs
When the current front month contract expires, the next closest back month contract "promotes" to become the new front month. For example, if the March contract expires, the April contract (which was previously a back month) becomes the new front month/spot month. Liquidity typically rolls over to this new front month a few days before the old one expires.
Yes, options are listed on back month futures contracts. However, liquidity is an even bigger concern here. The "Open Interest" on back month options can be very low. If you buy an option on a contract expiring in one year, you may find it difficult to sell that option later at a fair price due to wide spreads.
This condition is called "Backwardation." It usually happens when there is a severe shortage of the commodity *right now* (high spot demand), or when holding the asset yields a benefit (convenience yield). It implies that the market expects the supply crunch to ease in the future, causing prices to normalize (drop) over time.
Often, yes. While the baseline margin might be similar, clearinghouses may adjust margins for back months based on liquidity and volatility. Furthermore, trading a "spread" (Long Front / Short Back) usually has a much lower margin requirement than holding a naked position in a back month, because the spread creates a natural hedge.
In some markets, traders look for a contract that is not the immediate front month (too volatile) but not too far out (too illiquid). The second or third month out is sometimes referred to as the "Goldilocks" zone—offering a balance of decent liquidity and stability, though this is slang rather than a formal term.
The Bottom Line
Back month contracts are the time machines of the financial markets. They allow participants to project value into the future, enabling critical economic functions like hedging and long-term planning. While the front month dominates the headlines and day trading volume, the back months reveal the market's deeper structural expectations—whether it anticipates a glut (Contango) or a shortage (Backwardation). For the retail trader, back months offer opportunities for spread trading and avoiding the chaotic volatility of expiration day, but they demand respect for liquidity risks. Understanding the dynamics of the entire futures curve, not just the spot price, is what separates professional derivatives traders from amateurs.
More in Futures Contracts
At a Glance
Key Takeaways
- Back month contracts are all futures contracts expiring after the nearest (front) month.
- They typically have lower liquidity and wider bid-ask spreads compared to the front month.
- Prices of back month contracts reflect the "cost of carry" and market expectations for future supply and demand.
- A market is in "Contango" when back months are more expensive than the front month.