April 17 (Bloomberg) -- The following companies are having unusual price changes in Brazil trading. Stock symbols are in parentheses, and prices are as of 4:14 p.m. New York time. Preferred shares are usually the most-traded class of stock.

The Bovespa Index fell 0.5 percent to 45,778.28.

Cosan SA Industria & Comercio (CSAN3 BS) fell 12 percent to 12.50 reais, the biggest drop in more than five months. The world’s biggest sugar-cane processor dropped the most on the Bovespa Index on speculation the government may cut diesel and gasoline prices, reducing demand for the company’s ethanol.

Eletropaulo Metropolitana SA (ELPL6 BS) dropped 4 percent to 32.51 reais. The Brazilian unit of AES Corp. was cut to “hold” from “buy” at Banco Santander SA.

Lojas Renner SA (LREN3 BS) fell 5.1 percent to 18.14 reais. Brazil’s biggest publicly traded clothing retailer was cut to “underperform” from “hold” at Raymond James & Associates, which cited its valuation and “poor” earnings outlook.

Net Servicos de Comunicacao SA (NETC4 BS) rose 3.9 percent to 15.90 reais. Brazil’s biggest cable-TV company gained for the first time this week on speculation it will be able to offset revenue losses after it was prohibited from charging for extra connections.

Usinas Siderurgicas de Minas Gerais SA (USIM5 BS) rose to a six-month high, adding 4.2 percent to 34.71 reais. Credit Suisse Group AG said Cia. Vale do Rio Doce’s sale of its stake in the steel company at an above-market price signaled the stock is undervalued.

Votorantim Celulose & Papel SA (VCPA4 BS) dropped 4.9 percent to 14.50 reais. Brazil’s third-biggest pulp maker was cut to junk status by Moody’s Investors Service. VCP’s rating was reduced to Ba1, one level below investment grade, due to higher debt after the takeover of Aracruz Celulose SA. VCP and Aracruz were cut to “sell” at Deutsche Bank AG on the outlook for lower Chinese demand. Aracruz (ARCZ6 BS) fell 4.8 percent to 2 reais.

To contact the reporter on this story: Paulo Winterstein in Sao Paulo at pwinterstein@bloomberg.net.

Last Updated: April 17, 2009 17:26 EDT