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Proposed methodology to quantify ESG metrics to better explain the impact on market value: a case study of gold mining, A
Jones, Sarah L.
Jones, Sarah L.
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2023
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Abstract
It is believed by some that environmental, social, and governance (ESG) has become a
vital determinant of a mining company’s market value, in addition to the traditional
metrics of production, country risk, deposit characteristics, and corporate management.
Institutional investment firms, like BlackRock, invest trillions of dollars annually through
mutual funds and exchange-traded funds to promote sustainable development by analyzing
a company’s positive ESG metrics to support their investment decisions (BlackRock, 2018).
Therefore, mining companies must maintain positive ESG performance to access critical
institutional funding to continue operations or expand their investment portfolios.
Pursuing positive ESG initiatives, like reducing emissions or providing community
support, comes at a cost to the firm. Mining companies must determine if the benefit of
improved access to funding or any potential increase in market capitalization outweighs the
cost of implementing ESG. This thesis aims to determine if six of the largest gold mining
companies in the U.S. and Canada have received short- and long-term financial benefits
from implementing ESG practices. The short-term impact is evaluated using an event
study approach and finds the market has been unresponsive to positive or negative ESG
performance information. Regression analysis determined that ESG ratings do not
correlate to a firm’s long-term financial performance.
ESG ratings are meant to assess the potential financial risks to investors from
environmental, social, and internal governance practices that may impact a firm’s
reputation or financial profitability. Measuring ESG performance is a qualitative
assessment of data gathered through interviews and questionnaires to the firm by an ESG
rating analyst or through self-assessment and disclosures using prescribed guidelines.
Third-party ESG scores may be subjective as each analyst may change the weight of ESG
criteria, and the data used is not always verified or reliable (Lovas, 2021). Unfortunately,
the lack of consistency between ESG rating methodologies, metrics, data, and weightings
causes confusion and often challenges and frustrates investors (Lovas, 2021). This thesis
addresses the lack of universal ESG metrics for the mining industry by recommending new
quantitative criteria for evaluating ESG initiatives from a technical perspective. For
instance, measuring the environmental risk should consider a firm’s efforts towards
biodiversity offsets, energy efficiency, limiting land disturbances, and proper tailings
management are all critical risks associated with mining.
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