President Trump’s decision in late June to relax the ban on US companies selling to Huawei sparked a brief sigh of relief across the global supply chain, especially among component vendors which count the Chinese giant as a major customer. Not all these were US firms. The hasty announcement, by Japan-owned, UK-based ARM, that it would suspend dealings with Huawei while it was on the US ‘entity list’, highlighted how the whole ecosystem would feel the ripple effect of US policy. Vendors round the world could have faced the prospect of continuing to supply Huawei at the cost of US sanctions. However, most of the uncertainty remains, about Huawei’s precise status in the USA, and whether that will change again.…