The latest escalation in the trade spat between China and the U.S., in the form of 10% duties on $200 billion of Chinese exports by America, has captured key elements of the IT industry including network equipment (worth $24 billion in the past 12 months) and PC components ($17 billion). Duties on the former will complicate supply chain decision-making for web services providers including Amazon, Alphabet and Facebook among others. There has been an acceleration in shipments of network equipment from China this year. Growth in the first quarter of 7% had climbed to 17% by May, while sea...