iRobot, the US firm behind the Roomba vacuum cleaner, has filed for bankruptcy protection due to intense competition from Chinese rivals and significant import tariffs. The company's main manufacturer, Shenzhen-based Picea Robotics, will assume ownership.

• The company's valuation plummeted from $3.56 billion in 2021 to approximately $140 million.
• US import duties of 46% on goods from Vietnam increased costs by $23 million (£17.2 million) this year.
• A planned $1.7 billion takeover by Amazon was blocked last year by the European Union's competition watchdog.