← Back to Blog · 2026-09-04 · 6 min read · Market Preview

You’re staring at the 15-minute chart on the Shanghai Futures Exchange (SHFE). Rebar just broke out of a tight intraday range. You jump in long, chasing the momentum. Twenty minutes later, price reverses sharply, stops you out, and then proceeds to grind lower for the rest of the week. Sound familiar?

If you are only looking at price action and volume, you are trading blind in the Chinese commodity futures market. To trade rebar effectively, you need to understand the physical realities of the market—specifically, the relationship between the futures price, the spot price (the basis), and the physical metal sitting in exchange-approved warehouses (warehouse warrants). Let’s break down how these forces interact and how you can use them to catch major price reversals.

The Rebar Contract: Specs You Need to Know

Before we dive into the macro dynamics, let’s ground ourselves in the mechanics. If you want to trade rebar, you are trading the SHFE rebar futures contract (ticker: rb).

• Exchange: Shanghai Futures Exchange (SHFE)
• Contract Multiplier: 10 tons per lot
• Tick Size: 1 RMB per ton (meaning 1 tick = 10 RMB per contract)
• Delivery Months: January, May, and October (the most active are usually May and October)

Because the contract is physically settled, the futures price cannot decouple from reality indefinitely. Eventually, someone has to take delivery of 10 tons of steel rebar, or deliver it. This physical tether is what makes warehouse warrants such a powerful indicator.

What is the Basis and Why Do Warehouse Warrants Matter?

The basis is simply the difference between the spot price and the futures price. In a normal, healthy market, futures trade at a premium to spot. This is called contango. It makes logical sense: if you buy steel today for future delivery, the seller has to store it, finance it, and insure it. The futures price should compensate them for those costs.

When futures trade below spot, we call this backwardation. It usually means the market is experiencing a near-term shortage—buyers want the metal right now and are willing to pay a premium for immediate delivery.

But how do you know if the market is actually tight or just feeling emotional? This is where warehouse warrants come in. Warehouse warrants are registered receipts for physical commodities that have been inspected and approved for delivery against SHFE futures contracts. When you see warehouse warrant stocks rising or falling, you are seeing real metal moving in and out of the exchange's delivery system.

Price lies. Momentum indicators lag. But warehouse warrants represent actual tons of steel sitting in a yard. You can't fake a warehouse receipt.

The Mechanics of a Reversal: When Warrants Hit Extremes

Most retail traders in China futures focus solely on social inventory data (the steel sitting in private trading warehouses). While useful, exchange warehouse warrants tell a different, more aggressive story. They tell you what producers and big traders are preparing to deliver. Here is how you use extremes in warrant stocks to signal reversals.

The Bearish Overhang: Spiking Warrants in Contango

Imagine this scenario: Rebar futures are trading at a healthy premium to spot prices (contango), but spot demand from construction sites is dead. Steel mills are producing, but cash buyers aren't showing up. What do the mills do? They register their unsold metal as exchange warehouse warrants. If futures are high enough, they can lock in a profitable hedge by selling futures short and delivering the physical metal later.

When you see warehouse warrant stocks climbing aggressively week-over-week while the futures curve remains in contango, it is a massive red flag. The smart money is dumping physical supply into the exchange system. A top is usually near.

The Squeeze Setup: Plunging Warrants in Backwardation

Conversely, consider a market where construction is booming, spot prices are soaring, and the futures curve flips into backwardation. If warehouse warrants are simultaneously draining to multi-year lows, it means the physical metal is being pulled out of the exchange system to meet immediate real-world demand.

In this environment, shorts are in serious trouble. If they hold their positions to delivery, they won't be able to find the physical metal to deliver. This creates a short squeeze. However, if warrants stay low but spot prices suddenly stop rising and start to flatten, it often signals the end of the squeeze. The demand has been satiated, and the market is about to roll over.

A Real-World Lesson from Chinese Commodity Futures

To see how this plays out, we don't need to look far back. During the massive infrastructure and property boom in 2021, Chinese steel and iron ore markets went on a historic run. As property developers rushed to finish projects, physical steel was scarce. Warehouse warrants on SHFE dropped dramatically, and the market spent weeks in backwardation. Traders who understood this dynamic rode the trend higher.

But the reversal was equally telling. When the property sector began to cool down later that year due to regulatory crackdowns, physical demand evaporated almost overnight. Spot prices stalled, but futures initially held their premium. What happened next? Warehouse warrants began to spike as mills scrambled to offload unsold inventory into the exchange system. Traders who watched the warrants saw the writing on the wall and positioned short, catching the brutal downside reversal that followed.

Putting It Into Practice: Your Trading Rules

Understanding the theory is great, but you need actionable rules. If you want to trade rebar or trade iron ore using this logic, here is a practical framework.

Rule 1: Track the Weekly Warrant Report

SHFE publishes warehouse warrant data weekly. You need to track this as religiously as you track the non-farm payrolls or CPI. Don't just look at the absolute number; look at the rate of change. A sudden 20% jump in warrants over two weeks is a signal, even if the absolute number isn't a record high.

Rule 2: Map Warrants to the Basis

Never look at warrants in isolation. Always pair them with the basis.

Rule 3: Use Price Action for Entry

The warrant data gives you your directional bias and your macro context; it is not a tick-by-tick entry trigger. If warrants are spiking and the basis is in contango, you know you want to be short. Now, drop down to your 1-hour or 4-hour chart. Wait for a failed breakout to the upside, a lower high, or a break of market structure to the downside. Use the warrant data as your conviction, and use price action to time your risk.

Rule 4: Mind the Roll Yield

If you are holding a position for weeks, you have to roll your contract. In a contango market, rolling from the front month to the active month means you are selling a cheaper contract and buying a more expensive one—a negative roll yield. If you are fighting a bearish warrant setup by holding a long position, the negative roll yield will bleed your account dry even if the spot price doesn't move.

Conclusion: Test Your Edge Before You Risk Capital

Trading Chinese commodity futures requires more than just drawing trendlines on a chart. The physical settlement mechanism means that supply chain realities—like warehouse warrant stocks and basis dynamics—ultimately drive price discovery. By tracking the flow of physical metal into and out of exchange warehouses, you can position yourself on the same side as the producers and large hedgers, avoiding the traps that chop up purely technical retail traders.

If you have built a system that incorporates basis and warrant tracking, the next step is to prove it works under real market pressure. You can test your strategy on a real-data China futures evaluation at XS Select, with challenges starting from $29. It’s an honest way to validate your edge, manage your risk, and see if your macro-to-micro trading approach holds up when the clock is ticking. Build your edge, track the warrants, and trade with conviction.