Spot vs. Contract Models in Mineral Trading
1. Definitions
| Model | Core idea |
|---|---|
| Spot | One‑off sale executed at current market price; delivery typically within 15–45 days. |
| Term Contract | Multi‑shipment agreement (3 months – 5 years) with predefined volume, grade, pricing formula, and performance clauses. |
| Hybrid / Frame | Master contract fixes T&Cs; each cargo priced via spot index on lift‑off. |
2. Commercial Trade‑offs
| Attribute | Spot | Contract |
|---|---|---|
| Price certainty | Low — floats with daily moves | High — formula or fixed price for tenor |
| Volume security | None; rely on open market | Guaranteed tonnage/uptake ± tolerance |
| Cashflow timing | Faster; invoice at loading | Forward planning; LC lines in place |
| Admin/banking cost | Minimal docs; CAD common | LC/guarantee fees; audits, sampling |
| Logistics planning | Opportunistic freight | Long‑term slot bookings, take‑or‑pay |
| Counter‑party risk | Lower (single cargo) | Higher; mitigated by bonds/parent guar. |
| Typical users | Traders arbitraging price gaps; smelters topping up | OEMs needing supply security; mines financing capex |
3. Price Mechanisms
Spot: Flat USD/t or same‑day index + premium. Example: MB Sb 99.65 CFR China +/– bid‑offer spread.
Contract:
Fixed (e.g., US $300/t for 12 months);
Index‑linked (e.g., MB 3‑month avg × payability);
Collar (floor & cap), or
Escalator (cost‑inflation pass‑through every quarter).
4. Risk Management Angle
| Risk type | Spot mitigation | Contract mitigation |
|---|---|---|
| Price volatility | Trade fewer lots; hedge on futures | Built‑in formula; optional price‑review clause |
| Supply disruption | Maintain supplier slate | Force‑majeure carve‑outs; performance bond |
| Quality drift | SGS at each cargo | Rejection/penalty schedule over tenor |
5. When to prefer each model
Spot is better when:
Market is backwardated and likely to soften.
You need trial cargo before committing capital.
Buyer’s warehouse full; only marginal tonnage needed.
Contract is better when:
You plan plant expansions around assured feed.
Index liquidity is thin; spot quotes swing ±10 % week to week.
Financing bank requires offtake to lend against mine project.
6. Hybrid Examples
Volume take‑or‑pay, price spot: 100 kt Sb ore yearly; each shipment at Fastmarkets index − US $50/t.
Framework with quarterly re‑opener: Plastics‑grade talc contract adjusts price if MB index moves > ±7 % in any rolling 90 days.
7. Checklist before choosing
Forecast price curve & volatility.
Working‑capital capacity for LC fees or margin calls.
Supplier/buyer concentration risk.
Freight space availability & seasonality.
(Updated June 2025)