BVN NYSE Report created on 5/06/11

Compania de Minas BuenaventuraSA, US

© 2011 Wall Street On Demand, Inc. Page 1

Current RatingOverview

Last Close Price

$39.66Rating Reiterated on 5/06/11

REDUCE

About the Current Rating

Downgraded from Hold

18 Daysat Current

Rating

0.5%% Change since

Current Rating Issued

Team Member's Rating Information

RatingDate

Upgrade/Downgrade Rating

RatingReiterated

Ford Equity Research 4/13/11 Hold 4/27/11

Jaywalk 3/04/11 Hold 5/02/11

The Street.com 8/20/09 Buy 5/01/11

Market Edge 4/18/11 Avoid 4/29/11

ResearchTeam 4/18/11 Reduce 5/06/11

ResearchTeam Rating Performance (%) ?

Performance of theResearchTeam ratingis calculated as if this

stock was purchasedwhen the team hadan Accumulate or

Hold rating, and soldshort when the teamhad a Reduce rating.

-40

-20

0

20%

-40

-20

0

20%

1 Month 3 Month 1 YearSince

1/1/2008

ResearchTeam for BVN -11.9 -23.2 3.3 -27.5

Accumulate Ratings -- -- -- --

Hold Ratings -6.7 -13.9 15.7 5.9

Reduce Ratings -5.6 -10.9 -10.7 -31.5

BVN -1.5 -4.5 28.1 39.3

S&P 500 Total Return Index 2.5 4.8 17.2 0.0

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Rating Accuracy

40.0%?Rating History & Rating Accuracy

This team has changed its rating for BVN 10 times over the past 21 months. The direction for each team rating was correct for 4 of the 10 ratings atthe end of each rating period, resulting in a rating accuracy of 40.0% and a TTM rating accuracy of 50.0%.

Ratings

CORRECT RATINGS

INCORRECT RATINGS

Accuracy

30

40

50

$60

SEP2009

OCT JAN2010

APR JUL OCT JAN2011

APR

Redu

ce

10

Hold

9

Redu

ce

8

Hold

7

Redu

ce

6

Hold

5

Redu

ce

4

Hold

3

Redu

ce

2

Hold

1

BVN$39.66

S&P 500 TR

Date of Rating RatingUpgrade orDowngrade

BVNPrice ($) onRating Date

# of Days atThis Rating

RatingAccuracy

TotalReturn

% Change in Benchmark

Over Rating Period

Underperform/Outperform Index

10 4/18/11 Reduce 39.47 18 Incorrect 0.5 2.7 Underperform

9 2/22/11 Hold 46.17 55 Incorrect -13.9 0.7 Underperform

8 12/20/10 Reduce 48.54 64 Correct -4.9 4.5 Underperform

7 9/22/10 Hold 41.76 89 Correct 16.6 12.1 Outperform

6 8/23/10 Reduce 37.89 30 Incorrect 10.2 7.1 Outperform

5 4/12/10 Hold 32.90 133 Correct 15.2 -11.5 Outperform

4 3/29/10 Reduce 30.71 14 Incorrect 8.1 2.1 Outperform

3 3/01/10 Hold 34.83 28 Incorrect -11.8 5.1 Underperform

2 12/21/09 Reduce 31.85 70 Incorrect 9.4 0.4 Outperform

1 8/10/09 Hold 25.48 133 Correct 25.5 13.3 Outperform

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How the ResearchTeam Rating Provides Greater Positive Performance

Jaywalk

Ford Equity Research

Standard & Poor's

MarketEdge

TheStreet.Com

ResearchTeam Members Inputs OutputResearchTeam Engine

Research Providers

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ResearchTeam Rating

A Rating that is more

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Team Members Ratings History

An audited rating history for

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Historical Analysis

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ResearchTeam ratings

STEP 1 STEP 2

Rating

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