The five stocks with the heaviest weight in this index were: Vale PNA (10,754%), Petrobras PN (10,439%), OGX Petróleo ON (4,816%), Itauunibanco PN (3,830%) and BMFBovespa ON (3,745%).
For comparison purposes, the stocks with the heaviest weight in the Ibovespa portfolio announced on September 1, 2010 were: Vale PNA (10.748%), Petrobras PN (9.709%), BMFBOVESPA ON (3.822%), Itauunibanco PN (3.791%) and OGX Petróleo ON (3.750%).
The Exchange also announces the third previews of the other 14 indices, including the Corporate Sustainability Index (ISE) and the first preview of the Carbon Efficient Index (ICO2) launched on December 2, 2010.
BM&FBOVESPA regularly announces three previews of the new indices 30 days, 15 days and one day prior to the new quarterly 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.
About the Methodology
Ibovespa: Composed of the stocks whose negotiability indices, financial volume participation and trading session presence during the previous 12 months met the criteria established by their respective calculation methodologies.
IBrX-50 and IBrX - Brazil Indices: Following an international methodology, these indices are composed respectively of the 50 and 100 most traded stocks at BOVESPA, weighted by their market capitalization.
MidLarge Cap and Small Cap: These indices were developed to measure the performance of the companies listed in the Exchange segmenting them by market capitalization.