Wall Street em alta ligeira no arranque da 'earnings season' <p>(http://economico.sapo.pt/public/uploads/articles/foto_pequena/nysexchange_pequena.jpg) (http://economico.sapo.pt/noticias/wall-street-em-alta-ligeira-no-arranque-da-earnings-season_142242.html)</p>Bolsas dos EUA seguem com ganhos tímidos, antes de a Alcoa revelar as contas do primeiro trimestre.
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