Reading Time: < 1 minute Sao Paulo | Reuters –– Shares in JBS SA, the world’s biggest beef exporter, tumbled on Tuesday after prosecutors demanded that Joesley Batista step aside as head of JBS controlling shareholder J+F Investimentos SA. Common shares fell as much as 6.2 per cent to 11.29 reais (C$4.76) in early trading before paring losses to 11.85 […] Read more