Meanwhile French outfit Carrefour falling by 2%. On Thursday, shares in Kroger, the biggest US supermarket operator, had closed 8% lower while Walmart – the world’s biggest retailer – fell 2%.
Whole Foods, which has 460 stores, mainly in the US, will start offering lower prices on a range of products when its takeover by Amazon completes on Monday.
In the UK, where it has nine stores, there will be reductions on organic lines such as avocados, eggs, salmon and kale.
Jeff Wilke, chief executive of Amazon Worldwide Consumer, said: “We’re determined to make healthy and organic food affordable for everyone.”