Logica, with a stock market value nearer £1bn than the £2.3bn Footsie plimsoll line, looks a cert for demotion. Shares in the company led by managing director and chief executive Dr Martin Read have crashed after a profits warning last month, and the same fate has overtaken another past favourite, Electrocomponents. Its value has fallen below £2bn, and it also looks set for the chop. Electronic chip designer Arm Holdings could also be at risk after a sharp broker's downgrade in the past week, along with International Power and EMI, since all their rankings have been edging over 100 in recent weeks.