OREANDA-NEWS. May 04, 2011. BM&FBOVESPA hereby announces the Ibovespa Index theoretical portfolio valid for the period of May 2 to August 31, 2011, based on the closing of the April 29, 2011 session. There are no alterations to the new portfolio, which totals 69 stocks in 63 companies.

The five stocks with the heaviest weight in the index were: Vale PNA (10.346%), Petrobras PN (10.201%), OGX Petroleo ON (4.878%), Itauunibanco PN (4.127%) and BMFBOVESPA ON (3.693%).

For purposes of comparison, the stocks with the heaviest weight in the Ibovespa portfolio announced on January 3, 201 were: Vale PNA (10.758%), Petrobras PN (10.460%), OGX Petroleo ON (4.806%), Itauunibanco PN (3.829%) and BMFBOVESPA ON (3.739%).

The Exchange also announces hereby portfolio of the other indices.

BM&FBOVESPA regularly announces the previews of the new indexes 30 days, 15 days and one day prior to the new four-month portfolio. The methodology for the MidLarge Cap and Small Cap indices defines their shares 15 days prior to the new portfolios coming into effect. The Exchange can, however, bring forward the announcement of previews, or even increase their number.