The Qatari state investment fund has been stealthily buying more shares over the past two weeks, with the latest disclosure today, taking its stake to more than 11.7%. Glencore’s bid values each Xstrata share at 2.8 Glencore shares but the Qatari’s are demanding 3.25. Both share prices have taken a battering, falling around 29% since highs in February — meaning the share ratio has remained the same. Glencore chief executive Ivan Glasenberg has remained resolute on the bid price, arguing falling commodity prices have taken their toll.