More than £3.5bn was wiped off the value of Glencore after warnings that its shares could become almost worthless if commodity prices continue to languish at their current levels. Shares, which have already hit record lows this month, plunged by a further 30 per cent yesterday. Investors were spooked by grim economic data from China and stalling growth in emerging markets. This was compounded by a stark warning from Investec that highlighted the sheer size of Glencore’s debt mountain in the face of rock-bottom metal prices. The rout in Glencore and others in its sector wiped £36billion off the value of the FTSE 100, ... (full story)