By Anthony Harrup Of DOW JONES NEWSWIRES MEXICO CITY (Dow Jones)--Mexican stocks opened lower Tuesday as investors appeared set to take some profits after a run of nine consecutive winning sessions. The market's IPC index of leading issues was down 0.7% to 26,112.70 points around 10:05 a.m. EDT, led by market heavyweight America Movil (AMX). Volume was 32.9 million shares worth 771.5 million pesos ($58.2 million). A Mexico City trader said profit-taking was likely following nine straight sessions of gains. Activity was light, he said, with investor focus on second-quarter earnings. America Movil L shares were down 1.4% to MXN27.56. The wireless company plans to release its second-quarter earnings after the market close. Analysts expect it increased sales and profits despite economic downturns in many of its markets and an outright recession in Mexico. Copper mining company Grupo Mexico (GMEXICO.MX) B shares were down 1.1% to MXN15.79. Grupo Mexico's main mining unit Southern Copper Corp. (PCU) reported a 68% drop in second-quarter net profit on lower metals prices. Grupo Mexico said it plans to pay dividends in stock, giving shareholders 1 new share for every 75 shares owned. The peso firmed against the U.S. dollar and was quoted in Mexico City at MXN13.2725. The currency was stronger than its MXN13.30 close Monday, but had given back some of its early gains. The Ixe brokerage said in a report it expects the peso to trade between MXN13.25 and MXN13.35 to the dollar during the session, "following movements in stock markets." -By Anthony Harrup, Dow Jones Newswires; (5255) 5001 5727; anthony.harrup@dowjones.com

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