(The author is a Reuters columnist. The opinions expressed are his own.)
(Reuters) – Commodity producers and traders have no doubt been cheered by the recent recovery in China’s key manufacturing sector, but the boost may be more to sentiment than actual demand.
This is because there is a fairly weak correlation between movements in China’s official Purchasing Managers’ Index (PMI) and imports of key commodities such as crude oil, iron ore and copper. There is a far better correlation between China’s imports and the price of these commodities.
This suggests that while stronger, or weaker, industrial growth helps set the direction for imports, the actual size of the movement in imports is more related to price.
The official PMI rose to a 16-month high of 51.0 in August, beating market expectations for a reading of 50.6, with the breakdown showing better conditions across the factory sector, including the key export orders category.