Quick Answer
The spot month is the contract month closest to expiration, the one now eligible for delivery. Speculators typically exit as delivery nears, so the traders left are mostly commercials, and liquidity thins. Speculative position limits get tighter in the spot month, keyed to deliverable supply, because a large position could distort prices near delivery.
As a contract enters its final month, its whole character changes. The point that trips people up is the direction of position limits: they get stricter, not looser, as delivery approaches.
What the Spot Month Is
The spot month is the contract that is maturing right now, which is what makes delivery a live possibility.
- Spot month (current delivery month, nearby, or front month): the contract month closest to expiration, the one now maturing and eligible for delivery.
- Nearby vs deferred: "nearby" is the nearest traded month; "deferred" (or "back") months expire later. As a contract reaches its spot month, it shifts from a purely paper instrument toward one that can settle by physical delivery.
Who Is Left, and What Happens to Liquidity
The mix of traders shifts as delivery nears, and that shift drains liquidity from the front month.
- Speculators typically exit: traders with no use for the physical roll to a deferred month or go flat as the spot month approaches.
- Commercials remain: the traders who stay are largely commercials (hedgers) who genuinely intend to make or take delivery.
- Liquidity thins: as open interest rolls forward, the spot month gets thinner, which can widen bid-ask spreads and make large orders harder to fill.
Tighter Position Limits in the Spot Month
Position limits are the classic direction trap in this section, so anchor which way they move.
- Spot-month limits are tighter (smaller): speculative position limits are typically lower in the spot month than in earlier months.
- Why they tighten: with physical delivery imminent, a large speculative position could distort prices or strain deliverable supply, so exchanges and the Commodity Futures Trading Commission (CFTC) cap spot-month positions more strictly. Spot-month limits are keyed to estimated deliverable supply.
Think of it this way: the closer a contract gets to delivery, the more a single oversized position could squeeze the limited supply that is actually deliverable. The exchange tightens the leash exactly when the risk of a squeeze is highest, so limits shrink as delivery nears.
Exam Tip: Gotchas
- Position limits get tighter as delivery approaches, not looser. An answer that says limits "loosen" or "expand" near expiration has the direction backwards. The spot month is where limits are at their smallest, because deliverable supply is the binding constraint.