BM&FBOVESPA Announces The Ibovespa And Other Index Portfolios, Valid For January-April 2012

BM&FBOVESPA announced the Ibovespa theoretical index portfolio, which will be valid from January 2 to April 30, 2012, based on the closing of the December 29, 2011 trading session. The new portfolio now includes common shares in Dasa ON and Localiza ON, which brings its total to 70 stocks in 65 companies.

The five stocks with the heaviest weight in this index were: Vale PNA (9.286%), Petrobras PN (8.230%), OGX Petróleo ON (5.198%), Itauunibanco PN (4.695%) and Bradesco PN (3.364%).

For purposes of comparison, the stocks with the heaviest weight in the Ibovespa portfolio for September 5 to December 29, 2011 were: Petrobras PN (9.740%), Vale PNA (9.354%), OGX Petróleo ON (5.253%), Itauunibanco PN (4.436%) and BMFBOVESPA ON (3.447%).

BM&FBOVESPA regularly announces three previews of the new indexes: the 1st preview on the first trading session of the last month of the current portfolio; the 2nd preview on the trading session following the 15th of the last month of the current portfolio; and the 3rd preview on the last trading session of the current portfolio. The Exchange also publishes the portfolios of the other indices calculated.

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: Following an international methodology, these indices are composed respectively of the 50 and 100 most traded stocks at BM&FBOVESPA, 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.

See the portfolios: