TheESG Performance and Attributionsection of the OTM clarifies that measuring ESG impact on returns involves quantitative decomposition, often using theBrinson modeland multi-factor risk frameworks. It explains:
“ESG performance attribution can bedecomposed using Brinson and risk factor methodologies, identifying how ESG tilts, exclusions, or integration decisions contributed to active returns.”
This allows analysts to isolate the effects of ESG scoring, factor exposure (e.g., quality, size, value), and sector allocation. However, the manual also cautions that attribution is complex infixed income, due to duration, credit quality, and issuer heterogeneity, making option A incorrect. Commercial tools (option B) support but do not fully automate this analysis.
Thus, optionCcorrectly reflects both the methodology and practical application as described.
????Reference:2021-Final-Book.pdf, Chapter 9 — Investment Mandates, Portfolio Analytics, and Client Reporting (ESG Performance Attribution section).