BUZZ-Brazil's Itaú Unibanco: Votorantim cuts to "market perform"
** Preferred shares of Itaú Unibanco Holding SA, Brazil's largest bank by market cap, down 1 pct at 36.54 reais
** Analysts at Votorantim Corretora led by Flavio Yoshida cut recommendation to "market perform" from "outperform"
** Target set at 45 reais for year-end 2015
** Shares have risen by about a third this year
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