The leading Brazilian drinks group, Companhia de Bebidas das Americas SA (AmBev), has announced a R$200m ($71.68m) share buyback programme to run over a 90-day period. AmBev said it could buy back up to 307.8m voting shares, or 1.97 billion non-voting shares, representing 8.3% and 9.1% of preferred and ordinary shares currently in issue.