How to Read Global Oil and Commodity Price Moves

Read a commodity price move in a fixed order: which currency the price is quoted in, then the move in that currency, then the currency's own move over the same period, then the two combined by multiplication, and only then what the combination reaches. A domestic price move is two moves wearing one number, and most misreadings happen at the first step.

Which part of a rupee price move belongs to the commodity, and which to the currency?

The panel opens on the run worked through from here on, and the whole of that run can be read without touching a control. A barrel priced at 50.00 Marut units when the rate was 80.00 rupees to the unit costs Rs 4,000/-. By the last day the barrel is priced at 60.00 Marut units and the rate is 84.00 rupees, so it costs Rs 5,040/-. The commodity is up 20.00 per cent in its own currency, the Marut unit is dearer by 5.00 per cent against the rupee, and the domestic move is 26.00 per cent: 20.00 percentage points from the commodity, 5.00 from the currency, and 1.00 from the currency's rise landing on a price that had already gone up. At an 8.00 per cent basket weight and a 60.00 per cent share reaching a price inside the period, the contribution is 1.25 points.

Hold the world price still on the panel and the commodity's move goes to nothing, the rupee price of a barrel moves anyway, and all of that move belongs to the currency. Nothing about oil has happened.

The order borrows three things and rebuilds none of them: the cycle behind a commodity move, the observation that a price paid at home already carries a currency inside it, and the exchange rate with the direction language that goes with it. All three are covered separately. The order itself is the only addition: seven steps, each an action, each handing over something written down, each allowed to use nothing but what the step before produced.

In what order should a commodity price move be read?

Start with something concrete. A household orders a spare part from a seller abroad, the listing says the price went up, the card statement says the amount charged went up, and the two figures do not match. Nobody made an error. The seller repriced in its own currency, the rupee moved against that currency in the same weeks, and the statement is both of those arriving together as one number with no seam in it.

A commodity price move is that statement at national scale, and the reading order exists so the seam is opened before any figure is quoted rather than after. Each step is an action rather than a consideration, and finishes by putting one thing on paper that is all the following step may touch. None of the seven says why anything happened; where a reason is wanted the step points at the place it gets built and keeps moving.

What is established before the size of anything?

Step one looks like it is not doing anything, and it is the single place where most commodity readings go wrong. A quoted price arrives already attached to a currency, so naming it feels like reading the label out loud. But a figure travels much further than the sentence it was born in, and by the time it reaches a slide the label has fallen off and only a percentage survives. The same point is worked through under gold.

What does the move in the quoted currency hand over?

Step two is the step everybody thinks the whole reading consists of, and here it is one line long. On the Sankhya move the price of a barrelThe volume unit crude oil is bought, sold and counted in. A price with no volume unit attached to it prices nothing, so the unit travels with the number everywhere. rose 20.00 per cent in Marut units over the period, and the output is exactly that: 20.00 per cent, in Marut units.

The percentage will be quoted again later, and the currency will not follow it unless it is attached. So the currency goes beside the percentage in the same breath. A note saying twenty per cent and stopping is already broken; one saying twenty per cent in Marut units survives being read six weeks later by somebody who was not in the room. Whether the figure taken was a spot priceThe price for a cargo settling now rather than on some agreed date in the future. Pricing for future dates is a different subject and is covered separately. or an average over the period belongs beside it for the same reason.

How is the currency's own move taken for the same period?

Two things in that action are doing work. The same period: if step two covers a quarter and step three a month, step four multiplies two things that never happened together. The same direction: an exchange rate can be written two ways round, so one event reads as a rise in one form and a fall in the other. The direction language is built in full under exchange rates.

On the Sankhya move the Marut unit rose 5.00 per cent against the rupee over the same period, so in the direction step two used, the currency the oil is priced in became dearer by 5.00 per cent. Step three is complete once the percentage, the direction word and the period are written down, and complete before anything is combined.

How are the two moves combined into one domestic figure?

On the Sankhya move: 1.20 times 1.05 is 1.26, so the domestic move is 26.00 per cent and a barrel that cost Rs 4,000/- costs Rs 5,040/-. The arithmetic that produced it sits next to it, so anybody can check the two inputs against the one output.

A reader who adds instead of multiplying reports 25.00 per cent and is short by a full percentage point, and short by Rs 40/- on every barrel. The gap is not a rounding artefact and it widens as either move gets larger. The panel above shows where it sits: the currency's 5.00 per cent lands on a price that has already risen 20.00 per cent, and 5.00 per cent of that 20.00 is the missing 1.00. Why two moves compound rather than stack is covered separately.

Two units run through this order and they are easy to swap, so one point of vocabulary before going on. The difference between 26.00 per cent and 25.00 per cent is written here as one percentage point of move. The bare word points is reserved from step five onwards for the contribution a move makes to an index, and confusing the two is the single fault this order exists to prevent.

How is the reach of a move estimated without overstating it?

On the Sankhya move, the question was about a consumer price indexA single number tracking what one fixed shopping list costs over time, with each item counted according to how much of the list it makes up. How such an index is built and weighted is covered separately.. Fuel carries an 8.00 per cent weight in that basket, and 60.00 per cent of the move reaches a price inside the period. So 26.00 per cent times 8.00 per cent is 2.08 points, and 2.08 times 60.00 per cent is 1.248, printing as 1.25 points. The 2.08 travels with it as the figure it would have been had the whole move reached a price.

Nobody handed a reach figure without its weight and its pass-through can rebuild it or disagree with it, so such a figure is untestable. Handed 1.25 points on its own, a reader must either accept it or ignore it. Handed 26.00 per cent, an 8.00 per cent weight and a 60.00 per cent pass-through, that reader can put different multipliers in and find precisely where the two readings part company. Where either multiplier comes from is built separately.

What does a move not reach?

A contribution in points is a statement about one basket over one period, and a reader who is not told what fell outside it will assume nothing did. On the Sankhya move three things sat outside: the other 92.00 per cent of the basket, which is not fuel; a large part of the country's fuel spending, already fixed by contracts written before the move and unable to reprice however far the barrel went; and any effect slower than the period, never captured by a figure measured over the period.

Each exclusion is a specific thing with a name rather than a general note that the figure is uncertain, so naming exclusions is not hedging. A named exclusion tells the reader where to look next if the total ends up somewhere the contribution did not predict.

What would change this reading before the next one?

Three conditions were written down on the Sankhya move. The 8.00 per cent weight holds only until the basket is restated. A restatement changes the first multiplication in step five without any price moving at all. The 60.00 per cent pass-through holds only until the arrangements that hold a price still are changed or expire. The currency can also move again. A fresh currency move sends the reading back to step three rather than carrying the old figure forward.

The timing rule matters more than the list. Conditions written before the next move are a test, and conditions written after it are an explanation, and only the first kind can ever be wrong. Anybody can produce a reason once the answer is known. Written in advance, they show which part of the reading a surprise hit, and if none of them fires and the reading still misses, the list was short.

What does the whole order look like run once on one move?

Here is the same move taken through all seven steps, output by output. The barrel count in the failure further down comes from the sequence that built Sankhya's goods importsWhat a country paid for merchandise arriving from abroad during a period, taken before services and income are counted alongside it. Set out separately., and is reused here rather than reinvented.

Two arithmetic notes, so every figure above can be rebuilt rather than trusted. The barrel at Rs 4,000/- is 50.00 Marut units at 80.00 rupees to the unit. After the move it is 60.00 Marut units, 50.00 raised by 20.00 per cent, at 84.00 rupees, 80.00 raised by 5.00 per cent, and sixty units at 84.00 rupees is Rs 5,040/-. The contribution is 26.00 times 0.08 times 0.60, and the product is 1.248 points exactly, 1.25 at two decimals. Every component is printed, so a reader who disagrees with one can put a different one in and get a different answer.

When does the reading stop?

Stopping is part of the procedure rather than a judgement. The reading stops when all seven outputs are written down and not before. Six present means the reading is still running, however clear the picture may feel.

None of the seven steps produces a view about whether a price is high, or about where it goes next, and the order never finishes on one. Somebody will ask anyway, and saying that the sheet is all there is remains the truthful reply. A view would need material this order never collects: what a price would have to reach before behaviour changed, and what the supply side does over a longer horizon than the period read. Manufacturing one from a sheet that cannot carry it is how careful reading quietly becomes assertion dressed up as method.

What changes when the question is about a company rather than an economy?

Everything in the order stays where it is. An equity analyst, a lender sizing a working capital line and a treasurer at a road freight operator take the same seven steps in the same sequence. Every reader has to name what a move misses and what would move their own answer, so steps one to four do not change by a word, and steps six and seven do not change either.

Only the basket in step five changes, from a price index to that business's own cost baseEverything a business pays to produce and sell what it sells, taken together, before financing costs and tax. Its parts and how they behave are set out separately., and the same two multiplications run against it. Take the road freight operator in Sankhya. Diesel is 22.00 per cent of its cost base, and 45.00 per cent of a fuel move reaches its own costs inside the period, the rest sitting under freight rates already agreed with customers. The domestic move from step four is the same 26.00 per cent, so 26.00 times 22.00 per cent is 5.72 points at full pass-through, and 5.72 times 45.00 per cent is 2.574, printing as 2.57 points. Put that beside the index run: one move, one step four output, two completely different reach figures, 1.25 points against one basket and 2.57 against another. Neither is more correct, and the only way anybody can tell which question was answered is that the weight and the pass-through were written beside each answer.

What must never be a step in this order?

A procedure is defined as much by what it refuses to hold as by what it holds, and three things are kept out on purpose.

Never compare two prices without first checking that they are the same contract, the same unit and the same currency. This happens before step two rather than inside it. Two crude quotes can differ for four reasons: the grades differ, one is a contract monthThe delivery month a futures quote belongs to. Two quotes on different months are two different contracts, and how those months get priced against one another is covered separately. the other is not, one is a barrel and the other a tonne, or one is in dollars and the other in rupees. Any of those produces a percentage that looks exactly like a price move and is not one. The later steps work only on what step two handed them, so a reading built on a mismatched pair stays wrong through every step after it.

Never carry a percentage without the base it was taken on. The same two prices give two different percentages depending on which end the calculation starts from. A barrel moving from Rs 4,000/- to Rs 5,040/- is a rise of 26.00 per cent. Read the other way round, from Rs 5,040/- down to Rs 4,000/-, the same pair is a fall of 20.63 per cent: 1,040 divided by the larger figure is a smaller share. Neither number is wrong. Quoting either one without saying which end it started from is.

And never let a step explain why. Each of the seven does something and hands over a result, and not one offers a reason. A reason cannot be handed to the following step the way a figure can, so the moment a step starts explaining it stops being checkable. Reasons are built where they belong, and this order points at them and keeps going.

The Republic of Sankhya, its trading partner Marut, the road freight operator and the household ordering a part from abroad are invented.
Educational material. Not advice on any investment, tax, budget or market position.