Reject Shop shares plunge on profit warning SHARES in discount retail chain The Retail Shop have plunged to a 15-month low after the company warned its first-half profit was likely to be down as much as 17 per cent on the previous corresponding period following disappointing pre-Christmas sales. While sales for the six months to the end of December were up 17.7 per cent to $385.5 million, all of the gains were due to new store openings, with sales from existing stores flat over the period.