Analysis
Statistics Canada’s 6 October release reports a 4.7% increase in August energy export value and links the 2.1% rise in crude export value to higher prices. This is useful trade evidence, but it does not by itself describe well productivity. The product basket also contains different fuels, with different price and shipment movements.
For one homogeneous product, value in Canadian dollars equals physical quantity × unit price in US dollars × Canadian dollars per US dollar. Thus value ratios multiply; their percentage changes do not simply add. For a mixed basket, product-level calculations and consistent weights are needed. A unit-value change can also reflect changing quality or product mix.
Use a purely illustrative starting index of 100. Assume unit price rises 4%, quantity falls 2% and the exchange factor is initially unchanged. The result is 100 × 1.04 × 0.98 = 101.92: value rises 1.92% despite less physical volume. If Canadian dollars per US dollar then falls 1.5%, the index becomes 101.92 × 0.985 = 100.3912, a 0.3912% increase.
The chart shows price alone, quantity alone, both together and both with that exchange assumption. None of these rows reconstructs Canada’s reported 4.7% energy increase. The chosen 1.5% is an assumed change in CAD per USD, not the release’s reported change of 1.1 US cents in the value of the Canadian dollar.
An operational reading should align commodity, monthly reference period, currency, seasonal treatment and revision vintage, then inspect a physical-volume series alongside value. Rising receipts may improve cash generation while volumes stagnate; margin still depends on production, transport and processing costs. Without matched quantities and prices, causal attribution remains incomplete.