Online fashion retailer ASOS (LON:ASC) was one of the worst performing AIM shares in 2021 and its share price halved. On Thursday 13 January, ASOS will update the market about its trading. The poor share price performance was partly down to the profit warning last autumn, which coincided with Nick Beighton stepping down as chief executive. At that time, forecast pre-tax profit was slashed from £224.3m to £124.3m, down from £193.6m in 2020-21. Comparisons were always going to be tough because of the boost to sales from Covid-19 lockdowns. Supply chain problems have held back growth. Also, margi...