Methodological Aspects

Portfolio Composition  - September to December/2008

Current Portfolio Composition - 12/04/2008

IBrX-50 Historical Data

1st. Preview of the Portfolio - January to April/2009

METHODOLOGICAL ASPECTS

Presentation

IBrX-50 is an index which measures the total return on a theoretical portfolio composed by 50 stocks selected among BOVESPA’s most actively traded securities in terms of liquidity, weighted according to the outstanding shares’ market value. This index was designed to serve as a benchmark for investors and portfolio managers, and also to allow the launching and derivatives (futures, options on futures and options on index). IBrX-50 has the same characteristics of Brazil Index – IBrX, which is composed by 100 stocks, but has the operational advantage of being more easily reproduced by the market.

Shares Eligible for the Index

IBrX-50 will be composed of the 50 most liquid stock traded on BOVESPA, chosen according to the inclusion criteria described below.

Criteria for Inclusion in the Portfolio

The index portfolio will include the 50 eligible companies that meet cumulatively the following criteria:

a) to be among the 50-best classified stocks according to the negotiability index, measured in the last twelve months;

b) to have a trading session presence of at least 80%, measured in the last twelve months.

Companies that are under judicial reorganization, have filed for bankruptcy, are under a special regime or are subject to a trading halt of its security over an extended period of time will not integrate IBrX-50.

Criteria for Exclusion from the Portfolio

a) A share will be excluded from the portfolio, during the periodical reevaluations, if it no longer meets the criteria for inclusion.

b) If, during the life cycle of the portfolio, the issuing company enters a regime of judicial reorganization or files for bankruptcy, its shares will be excluded from the index portfolio. In case of a public offering which results in the removal from the market of a significant proportion of shares, the company will be excluded from the portfolio. In such cases, the necessary adjustments will be made to ensure the continuity of the index.

Term of the Portfolio

The theoretical portfolio will be valid for four months, for the periods of January to April, May to August and September to December.

The portfolio will be recalculated at the end of each four-month period, according to the procedures and criteria of this methodology.

Weighting Criterion

IBrX-50 will measure the return on a theoretical portfolio consisting of the securities that meet all the criteria described above, which are weighted according to the respective outstanding shares market value (of the type included in the portfolio), that is, those shares belonging to the controlling group will be excluded ("free float").

The base for IBrX-50 has been set at 1,000 points for the date of December 30th 1997, and its diffusion initiated on January 2nd 2003. In order to adapt to the initial base, the portfolio market value has been adjusted using a reducer (adjustment coefficient), designated by a in the index formula. That is,

Initial index = Value of portfolio / = 1,000

The reducer for the index will be altered whenever necessary to accommodate inclusions in or exclusions from the portfolios, on the occasion of the periodical rebalancing or on the occasion of any adjustments arising from benefits/events given by the companies, so that the index is automatically adjusted.

The specific weight of each share in the index may be altered during the term of the portfolio, due to the price evolution of each share and/or the benefit distribution by the issuing company.

When the issuing companies of component shares distribute benefits, the necessary adjustments will be made to guarantee that the index reflects not only the share price variations, but also the impact of the benefit distribution. Because of this methodology, IBrX-50 is considered to be an index that evaluates the total return of the shares comprising its portfolio.

Index Calculation

BOVESPA calculates IBrX-50 during the regular trading hours, taking into consideration the prices of the last trades carried out on the cash market (round-lot) with the component shares.

Suspension of Trading

In case of suspension of a component share, the index will use the price of the last trade registered on the Exchange until the resumption of trading. If trading is not permitted for a period of 50 days, as of the date of suspension, or if there are no perspectives that trading will be resumed, or in case of rebalancing of the portfolio, the share will be excluded from the portfolio. In such a case, the necessary adjustments will be made to ensure the continuity of the index.

Procedures for Rebalancing

In the four-month rebalancing the following procedures will be adopted:

1. The rebalancing of the index's theoretical portfolio will occur after the closing of the last trading session of the four-month period and will adopt the index closing value of this day as its base.

2. Once selection (share/type) of the companies that will compose the portfolio for the coming four-month period has been concluded, the respective market value of each company/share in the share type is calculated - by multiplying the number of outstanding shares by their closing price -, and the results are summed up. That is, the economic value of the new portfolio is calculated according to the closing prices of the day.

3. The reducer adjusted for the new portfolio is reached by dividing the economic value, calculated in accordance with item I.2, by the closing index of the four-month period.

4. The adjustment of the reducer aims to ensure the continuity of the index, in such a way that the number of index points does not change because of rebalancing. Thus, both the division of the "new market value" of the index theoretical portfolio by the new reducer, and the division of the "market value of the previous theoretical portfolio" by its respective reducer, result in the same index in terms of points.

Index Adjustments

So as to measure the total return on its theoretical portfolio, IBrX-50 will be adjusted for all benefits distributed by the issuing companies of the shares included in the portfolio.

1. Adjustments for benefits in shares of the same type (Bonuses/Splits/Reverse Splits/Subscriptions)

After the last trading day prior to the benefit distribution, the market value of the component share/type is recalculated. In order to do so, the theoretical quantity adjusted to the benefit distributed and the "ex-theoretical" price of the share are used. The value thus obtained will be the basis for comparing the evolution of this share on the following trading session.

Example:
Let's consider company XPT which distributed a share bonus of 50% on the share type, D-0 being the last trading day before the benefit distribution.

(1) Closing position of the component share/type on the last trading day before the benefit distribution, that is, the quantity of shares before distribution of the benefit multiplied by the last asset price registered for that day.

(2) Adjusted closing position of the component share/type on the last trading day before the benefit distribution, that is, considering the new quantity of shares and the "ex-theoretical" price. This data will be used as a basis for comparison for the following day.

(3) Closing position of the component share/type on the first "ex-rights" trading day, taking into consideration the new quantity of shares and the "ex-market" closing price.

(*) If necessary, the index reducer will be adjusted to guarantee that the number of index points suffers no alteration due to the adjustment to the benefit.

In the case of reverse splits, the theoretical quantity will be reduced on the proportion determined by the company and a special "ex-theoretical" price will be calculated in order to maintain the economic value of the component share/type unaltered.

Apart from these situations, whenever the issuing company communicates the occurrence of facts that result in changes in its total share quantity (conversion of debentures into shares, cancellation of shares, conversion of one type of share into another, etc.), the relevant adjustments will be carried out.

2. Benefits in cash or other events

After the closing of the trading session of the last trading day prior to benefit distribution, the market value of the component share/type is recalculated, maintaining the theoretical quantity of this share in the portfolio unaltered and using its "ex-theoretical" price. This value will serve as a basis for comparison of the share prices evolution on the following day.

Example:
Let's consider company ABC which distributed a dividend of R$ 30 per share, D-0 being the last trading day before the benefit distribution".

(1) Closing position of the component share/type on the last trading day before the benefit distribution, that is, the position calculated with the last price of that day.

(2) Adjusted closing position of the component share/type on the last trading day before the benefit distribution, that is, considering the same quantity of shares and the "ex-theoretical" price. This data will be used as a basis for comparison for the following day.

(3) Closing position of the component share/type on the first "ex-rights" trading day, taking into consideration the "ex-market" closing price.

(*) If necessary, the index reducer will be adjusted to guarantee that the number of index points suffers no alteration because of the adjustment to the benefit.

Special Procedures

1. Adjustments in the case of company spin-off

a) Announcement/effect of the spin-off

The announcement of the issuing company's decision to make a spin-off does not alter its situation in the index theoretical portfolio.

Once the spin-off has been made and while awaiting the resulting companies to be operational and registered, these companies will be considered as a trading unit and will remain in the index portfolio.

For the purposes of trading on BOVESPA, the effect of the spin-off means the act by which the shares of the companies resultant from the spin-off start to be traded on the trading session.

b) Beginning of trading on the stock exchange of the companies resulting from the spin-off

The index theoretical portfolio will include the companies resulting from the spin-off.

For example, company A was spun-off, giving rise to companies B (which holds 45% of the net worth of A), C (which holds 30%) and D (25%). Supposing that the participation of A in the index was 20%, the situations immediately prior to and subsequent to the start of trading of the spun-off companies would be as follows:

Closing of the trading session prior to the start of trading of the spun-off companies:

Opening of the trading session of the first trading date of the spun-off companies:

Notes:
- The example supposes that, in the spin-off, there was no reduction in the number of shares, but rather the distribution of shares of the companies resulting from the spin-off, in a quantity equivalent to that previously held. If the deliberation of the company is different the procedures will be adapted, but the logic behind the adjustment will be identical.

- In this example, as the spun-off company gave rise to three companies, the number of shares included in IBrX-50 would change to 52 while the adjustment phase lasted.

c) Next four-month re-compositions

For the selection of the companies/shares that cumulatively meet the criteria for inclusion, the following procedures will be adopted:

· the companies resulting from the spin-off will be treated as a trading unit and their negotiability data will be considered in conjunction with those of the spun-off company;

· when 12 months have passed following the spin-off BOVESPA will exclude those shares that fail to present a suitable trading profile, based on their presence on the trading session, number of trades and financial value.

2. Adjustments in the case of public offerings

Whenever a company launches a public offering that results in the acquisition of a significant proportion of the outstanding shares, BOVESPA may adopt one of the following procedures:

a) removal from the index of the percentage of outstanding shares bought by the company; or
b) removal of the share from the index and inclusion of another share in its place.

In either case, an adjustment will be made to the index reducer.

3. Adjustments in the case of mergers

a) Company with shares included in the index merges with company whose shares also belong to the index

The shares of the incorporating company remain in the index and its theoretical quantity is altered in order to reflect the company’s new free float. No other company is included in substitution of the incorporated company.

b) Company with shares included in the index merges with company whose shares do not belong to the index

The shares of the incorporating company remain in the index and its theoretical quantity is altered in order to reflect the company’s new free float.

c) Company with shares included in the index is incorporated by company whose shares are not included in the index

This situation will be analyzed on a case-by-case basis, and BOVESPA may, at its own discretion:

· exclude the share from the index and include another share in its place;

· substitute the share of the incorporated company for shares of the incorporating company.

Note: In any situation, adjustments will be made to the reducer and the new quantities of shares will be used. Also, on the occasion of the four-month reevaluations, the negotiability data of the incorporated company will be added to those of the incorporating company.

Calculation formula and procedures

Negotiability Index

The negotiability index is calculated according to the following formula:

where:

IN = negotiability index
ni = number of trades carried out with stock "i" on BOVESPA cash market (round-lot)
N = total number of trades carried our on BOVESPA cash market (round-lot)
vi = financial value generated by the trades carried out with share "i" on BOVESPA cash market (round-lot)
V = total financial value of BOVESPA cash market (round-lot)

Note: In the calculation of the negotiability index, cross trades are not considered.

Formula for Calculating IBrX-50

IBrX-50 may be calculated using the following formulas:

a) without using the reducer:

IBrX-50 (t) = index value on day "t"
IBrX-50 (t -1) = index value on day "t-1"
n = number of shares included in the index theoretical portfolio (50)
= theoretical quantity of share "i" available for trading on day "t-1". In the event of distribution of shares of the same type by the company, it refers to the theoretical quantity of share "i" available for trading on day "t-1", recalculated because of such benefit.
= price of share "i" at closing of day "t"
= closing price for share "i" on day "t-1", or its ex-theoretical price, in the case of benefit distribution on this day.

b) using the reducer:

where:

Index t = index value at moment "t"
n = total number of companies (in the share/type) included in the index theoretical portfolio
= last price of share "i" at moment "t"

= quantity of share "i" in the theoretical portfolio at moment "t" a = reducer used to adjust the index value to the current base

= reducer used to adjust the index value to the current base

Adjustment Procedure for Benefits

The theoretical quantities of the companies in the share/type (i.e. their number of outstanding shares) will remain constant during the portfolio's four-month period, and will only be altered in the event of benefit distribution in shares of the same type by the issuing companies (bonuses, splits, reverse splits, subscription, etc.).

The adjustment of the theoretical quantities in the exact proportion to the distributed benefit is carried out after the closing of BOVESPA's trading session, on the last day prior to the ex-date of the corporate action.

The following formula is used:

Qn = Qa * (1 + B + S)

where:

Qn = adjusted share quantity
Qa = previous share quantity
B = percentage of bonus and/or split, in index number
S = percentage of subscription, in index number

In the event that an approved benefit is partially homologated, or is not homologated, the quantity of shares in the portfolio will be proportionally reduced to reflect the real quantity of outstanding shares.

This adjustment will be carried out on the trading session after the date of receipt, by BOVESPA, of the communication expedited by the issuing company providing information of these facts. The index reducer will be adapted so that the index value suffers no alteration.

General Formula for Calculation of the "ex-theoretical" Price

where:

Pex = ex-theoretical price
Pc = last price before the benefit distribution
S = percentage of subscription, in index number
Z = issuing value of the share to be subscribed, in Brazilian currency
D = dividends received per share, in Brazilian currency
J = interest on capital, in Brazilian currency
Vet = theoretical economic value per share, resulting from benefits distributed in another share type/asset
B = percentage of bonus (or split), in index number

Note: The Vet is calculated considering the financial amount which would be obtained from the sale of shares of another type and/or other assets (debentures, shares of another company, etc.) received. For example, suppose that company A is distributing to its shareholders, free of charge, one share of company B for every two shares held of company A, and that the shares of company B are evaluated at $ 5.00/share. In this case, the Vet will be equal to $2.50.