Shares in DSG International, the Currys to PC World retailers, fell to new lows of 46p last week ahead of results this Thursday which are expected to show continued tough trading at the electrical retailer.
The group's chief executive, John Browett, will again be under pressure to explain how his new strategy, announced to investors in May, is being implemented. Shares in DSG have fallen steadily, from a high of 176p, over the past few months after two profit warnings.
Mr Browett has already said that pre-tax profits would be down to around £200m, from £295m last year.
DSG's shares have come under pressure because of investors' fears of serious competition following Carphone Warehouse's recent deal with Best Buy to open new stores across the UK and Europe.
The French electrical retailer Kesa, which owns 250 Comet stores in Britain and Darty in France, is also likely to warn of tougher times to come.
Retail sales figures last week showed a surprising 3.5 per cent rise in May, mainly on the back of food and clothing. But the high street group John Lewis reported on Friday a 9.7 per cent year-on-year fall in electrical and home technology sales in the past week.