Knight Trading Group will soft launch market making in German and French stocks by the end of this quarter as Jiway, the pan-European exchange owned by Sweden's OM Group and Morgan Stanley, witnessed its highest monthly trading volume since it was launched last November. Knight, which set up its European operation in London last summer, has limited its trading to UK stocks. Jiway's April volume totalled 2,622 trades, up from 577 in March, representing almost 1.2 million shares with an underlying value of €57.7m (£35.8m).