The trade tensions between the USA and China hung heavily over the financial results of Ericsson and Huawei last week. Not that they were showing signs of hurting Huawei’s performance, so far at least – the vendor reported a 24.4% year-on-year rise in revenue for the first nine months of the year, and a slightly improved profit margin, despite being placed on the US entity list, and being subject to security reviews in some US allied countries. But the question of how long Huawei would be able to remain impervious to the USA’s attempts to isolate it from western customers and suppliers overshadows the strong results, and forced the Chinese firm to issue a string of defensive statements about its…