Termination of deal with Nvidia costs SoftBank an Arm and a leg

SoftBank‘s deal to sell the chip designer Arm to US semiconductor giant Nvidia was worth $66 billion on paper when it collapsed this week — more than twice what SoftBank paid for the UK business in 2016. Now, instead of a fat profit from a sale, SoftBank is looking at an initial public offering for Arm in which it might struggle to break even.