In 1872 geometry was split into rival schools, each with its own rules and its own experts. A young mathematician named Felix Klein added no new geometry. He explained the ones that existed, with one idea now called the Erlangen programme: a geometry is defined by what stays the same when you move things around. That idea showed where each one fit.
Commerce has the same mess. A steel service center, a resin buyer, a freight network, a food company and a grain merchant all run buying, making, selling and hedging as four jobs, with four teams, four systems and four calendars. We think the four jobs are one subject with one set of rules. We call it commercial intelligence. This post states the rules, then shows what they reveal.
Everything is a conversion
Every business takes things in and puts things out. Coil becomes cut sheet. Resin becomes film. Beans at a farm become beans at a crush plant. An empty truck on its way home becomes paid freight. Stock in a warehouse becomes cash in the bank. Each step is a conversion, and every business is a web of them.
There are six kinds of conversion, and each one changes one thing about what you hold.
Those six changes give six questions you can ask about anything a business holds. Here they are for three very different things.
| Question | A steel coil | A freight lane | A tank of resin |
|---|---|---|---|
| What is it? | Hot rolled coil | A loaded trailer | Grade A resin |
| Where is it? | At the mill | Chicago to Dallas | At the terminal |
| When is it? | Delivered in March | Tuesday | Next quarter |
| Whose is it? | The mill's | The shipper's | Ours |
| Which risk does it carry? | The steel price | The spot rate | The resin price |
| How sure are we? | Certified grade | A tender, not a load | A forecast |
Three rules that never change
Klein asked what the allowed moves keep. Three things survive every conversion.
- What goes in comes out. Inputs and outputs balance. A plan that breaks this rule is wrong before anyone prices it.
- Value cannot appear from nowhere. If an input can become something, it is worth at least that thing, less the cost of the change. So an input is worth its best use, not what you paid for it. Physicists who study resources reach the same rule: a price can be read as a score that respects what each thing can become.
- A circle of trades cannot make money. Buy today, store, sell forward and borrow against the sale: after storage and interest, the loop gains nothing. If a spreadsheet shows it paying, check the forward price and the units first.
These rules look obvious. Read together, they say five things that are not.
What the rules reveal
1. Purchase price variance is a position taken by default
An ERP holds a standard cost, set at budget time. That number is a forward price, frozen on the day the budget closed. When the market moves, the variance report shows the gain or loss months later. The company held a position in its own inputs all year, with no limit, no owner and no decision. The rules do not say the position was wrong. They say it can be a choice.
2. A fixed price quote is an option worth pricing
A fixed price quote for twelve months promises delivery at a price the business does not yet know it can afford. A freight broker who signs an annual routing guide makes the same promise. Each one is an option the customer holds, and it is worth more the more prices move. In many companies the largest book of options sits in sales, where it is rarely priced. Pricing it protects the margin and gives the customer a clearer offer.
3. A hedge moves risk; it does not remove it
Draw a hedge as a conversion and this is plain.
The price risk goes to someone who wants it, through an exchange. The local gap, called basis, stays with you, and so does the cash: the exchange asks for margin when prices move, so a hedge that is right in December can drain cash in July. "Percent hedged" therefore measures effort, not result. No operation measures quality by how many inspectors it hired. It measures what comes off the line. Measure a hedge by the risk that is left.
4. Flexibility is long volatility
A second recipe, a boiler that burns two fuels, spare storage, a truck coming home empty: each is a choice the business can make later, and a choice is worth more when prices swing. The economist Craig Pirrong found that commodity trading houses earn the most in years of upheaval, because their business is choosing among changes in space, time and form. The swing that hurts a rigid competitor pays a flexible one. Flexibility is a financial asset that never appears on a balance sheet.
5. One clock improves profit and risk at once
Procurement prices at contract, operations monthly, logistics weekly, sales quarterly and risk daily. The market reprices every day. Almost every business decision trades profit against risk. Putting every team on the market's clock is the rare move that lifts profit and cuts risk together, because a stale price leaks both.
Not gambling
Many operators avoid commodity markets, and rightly: they run operations, not trading books, and speculation has no place in either. But a business that buys inputs and sells outputs already holds price risk every day. Operators already have the discipline to manage it. Inside their operations they run Six Sigma: limits agreed in advance, a chart that shows drift, a review when a point falls outside. Hedging is that same discipline, applied to the prices that cross the walls of the business. We help operators run it, inside limits they set. We do not trade.
Where this goes
Klein's programme took decades to work through. Ours starts with a post a week, and each post tests one link on the map. Next week: the market sets the price, and what a business controls when it does not control the price.
The full map of ideas, and where each comes from, is in How we think about commerce. For a recipe drawn as one diagram, read It's Never Just Lemons.
Sources. Felix Klein, Vergleichende Betrachtungen über neuere geometrische Forschungen (Erlangen, 1872). Bob Coecke, Tobias Fritz and Robert W. Spekkens, "A mathematical theory of resources" (2014). Craig Pirrong, The Economics of Commodity Trading Firms (Trafigura, 2014).