Ocado shares plunge as Amazon Pantry leaves supermarkets anxious

Retailer's stock price falls 8% as fears grow that new online grocery delivery service could cause tremors in an already competitive sector

Shares in Ocado dived more than 3% after fears that the online grocer faces increased competition from Amazon and is struggling to sign up an international partner.

The British retailer took a hit on Wednesday after Amazon said this week it would rapidly expand its grocery delivery service in the UK. Ocado shares have now fallen 8% since Christmas Eve, closing at 315p on Wednesday.