Hockey prepared to block buyouts JOE Hockey has fired a warning shot at companies seeking foreign investment approval that he will reject proposals that are not in the national interest. As US grains giant Archer Daniels Midland's chief executive Patricia Woertz made a rare visit to Australia to press the case for a $3.4 billion takeover of east coast monopoly GrainCorp, the Treasurer said he would not be bullied by foreign investors into approving deals.