International stocks trading in New York closed higher on Tuesday. The Bank of New York index of American depositary receipts rose 0.57% to 155.42. The European index increased 0.43% to 152.16, the Asian index improved 0.34% to 152.13, the Latin American index rose 2.4% to 307.43 and the emerging markets index gained 1.3% to 308.29. Among the companies with shares that actively traded was Petroleo Brasileiro SA (PBR, PETR3.BR, PETR4.BR), or Petrobras.

Brazilian shares rose and the real strengthened against the dollar Tuesday ahead of the publication of a poll on voter intentions for the October presidential election. Markets are guessing the result will show President Dilma Rousseff falling behind challenger Marina Silva. Recent polls showed Ms. Rousseff closing the gap with the former environment minister, who has led in polls since August, and shares have generally fallen and the real weakened on those days. Advancers included Petrobras, which rose 5.9% to $17.51.

AT&T (T) Chief Strategy Officer John Stankey isn't steering away from the idea that the company could buy some Mexican wireless assets from former partner America Movil SAB (AMOV, AMX.MX). Mr. Stankey declined to comment directly on speculation, but said the takeover of DirecTV (DTV) moves AT&T away from just being an investor in the region. America Movil shares rose 2.5% to $26.20.

Brazilian budget airline Gol Linhas Aereas Inteligentes' (GOL, GOLL4.BR) strategy to reduce supply in order to increase its margins is showing results, according to UBS. "GOL reported another supportive traffic performance [in August], still reaping the benefits of its well-executed turnaround strategy focused on profitability and disciplined capacity management. This rational capacity management allowed GOL to overcome the challenging macroeconomic environment in Brazil," says UBS. Gol shares rose 3.6% to $6.04.

Write to Tess Stynes at tess.stynes@wsj.com

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