Intel shares fell almost 31 per cent on Friday 30 October, US time, the chipmaker's worst day in more than half a century of trading data. Reuters put the hit to its market value at more than US$146 billion during the session, and the slide dragged chip stocks down around the world.

File photo of Intel headquarters in Santa Clara, California, 2011. Photo: Sixflashphoto / Wikimedia Commons (CC BY-SA 4.0), cropped