SAO PAULO--Brazil stocks opened weaker Wednesday as shares of state-controlled utility Eletrobras continued to drag down the index on the prospect of massive revenue losses.

The benchmark Ibovespa index opened at 56189, down 0.5% from the previous close of 56451 on Monday. Markets were closed Tuesday for a local holiday.

Centrais Eletricas Brasileiras (EBR, ELET6.BR), or Eletrobras, plunged for a third day Wednesday, with preferred shares and voting shares losing 13%. Brazil's government is demanding that utilities slash their power prices in exchange for a renewal of operating licenses. Eletrobras has said it will lose close to BRL10 billion in annual revenue by renewing the licenses and, while some companies have said they won't renew in order to avoid operating at a loss, investors expect Eletrobras -- in which the government has a 51% stake -- to renew the licenses.

Also pulling down the market was mobile-phone provider Tim Participacoes (TIMP3.BR), which was recently barred by telecommunications regulator Anatel from selling a new service plan. The Brazilian unit of Telecom Italia SpA (TIT.MI, TI) can't sell its new plan because Anatel said there was "potential instability in the network" and potential "damage to the quality of service" for all of TIM's users as a result of the Infinity Day promotion. Tim slipped 2.6% to BRL7.53.

Brazil's blue-chip stocks were mixed in early trading as global markets reacted to mixed news from Europe. While Germany signaled its willingness Wednesday to provide additional financing for the euro zone's bailout fund, the failure of Euro-zone ministers to reach a solution to the Southern European country's debt woes after a 12-hour meeting weighed on investors.

State-controlled oil producer Petroleo Brasileiro (PETR4.BR) climbed 1% to BRL19.32, while mining company Vale (VALE5.BR) slipped 0.3% to BRL34.95.

Government-controlled lender Banco do Brasil (BBAS3.BR) dropped 0.4% to BRL20.86, while rival Itau Unibanco Holding (ITUB4.BR) fell 0.2% to BRL30.90.

Airplane maker Embraer (EMBR3.BR) added 1.4% to BRL14.

Steelmaker Usiminas (USIM5.BR) rose 0.9% to BRL11.49, while rival CSN (CSNA3.BR) was unchanged at BRL10.23.

Write to Paulo Winterstein at paulo.winterstein@dowjones.com

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Banco Do Brasil (PK) (USOTC:BDORY)
Historical Stock Chart
From Jun 2024 to Jul 2024 Click Here for more Banco Do Brasil (PK) Charts.
Banco Do Brasil (PK) (USOTC:BDORY)
Historical Stock Chart
From Jul 2023 to Jul 2024 Click Here for more Banco Do Brasil (PK) Charts.