ISSB (IFRS S1 & S2)
The ISSB standards (IFRS S1 and S2) establish a global baseline for ESG disclosures, focusing on financially material sustainability risks and their impact on enterprise value.
ISSB disclosures are increasingly used by investors and analysts to evaluate risk, adjust valuation models, and compare companies globally.
Global baseline for ESG financial disclosures
Focus on financial materiality (investor relevance)
Covers general sustainability (S1) and climate (S2)
Aligns ESG reporting with financial reporting systems
Designed for investors and capital markets
ISSB in 30 Seconds
ISSB = International Sustainability Standards Board
IFRS S1 → general sustainability disclosures
IFRS S2 → climate-related disclosures
Focuses on financial materiality (enterprise value impact)
Builds on TCFD framework
Used globally as a baseline standard
ISSB defines how ESG risks are disclosed to investors in financial terms
ISSB enables cross-border comparability of ESG risks, allowing investors to evaluate companies across markets using a consistent framework
What ISSB Actually Does
ISSB requires companies to disclose financially material ESG information.
Disclose Financially Material ESG Risks
Risks affecting enterprise value
Integrate ESG into Financial Reporting
Link ESG with financial performance
Use Standardized Structure
Comparable disclosures across companies
Provide Forward-Looking Information
Risks, scenarios, and strategies
ISSB transforms ESG into investor-focused financial disclosure
ISSB does not define sustainability—it defines how sustainability risks are reported and interpreted financially
IFRS S1 vs S2 (Core Structure)
IFRS S1 (General Requirements)
All sustainability-related risks and opportunities
Governance, strategy, risk management, metrics
IFRS S2 (Climate)
Climate-specific risks
Emissions (Scope 1, 2, 3)
Climate scenarios
Transition and physical risk
S1 provides the framework, S2 provides the deep climate layer
Financial Materiality (Core Concept)
ISSB uses financial materiality as its core principle.
Financial Materiality
Only ESG factors that affect enterprise value
Focus is on investor-relevant information
Financial materiality focuses on enterprise value impact, not broader societal impact
Unlike CSRD, ISSB does NOT include impact materiality
ISSB is designed for capital markets, not broader stakeholder reporting
Structure of Disclosures (TCFD-Based)
ISSB follows the TCFD four-pillar structure.
Governance - Board oversight
Strategy - Impact on business model
Risk Management - Identification and management
Metrics & Targets - KPIs and goals
This structure ensures consistency across companies
What Companies Must Disclose
Risks & Opportunities - ESG factors affecting business
Financial Impact - Expected impact on cash flows
Scenario Analysis - Climate scenarios
Metrics - Emissions, targets
Disclosures must be quantitative, comparable, and decision-useful
Disclosures must be consistent with financial statements and assumptions used in financial reporting
Key Financial Mechanisms
ISSB affects companies and investors through specific financial mechanisms.
1. Transparency Mechanism
ESG risks disclosed → Investor visibility
2. Risk Pricing Mechanism
Investors price risk → Cost of capital impact
3. Valuation Mechanism
Cash flows and risk → Valuation changes
4. Capital Allocation Mechanism
Better information → Investment decisions
Financial Outputs:
• Risk pricing - investor assessment of ESG risk
• Cost of capital - transparency reduces uncertainty
• Valuation - cash flow and risk inputs
• Investment flows - better information drives decisions
These mechanisms influence both risk perception and capital pricing
Real Financial Pathways
Disclosure Pathway
ESG Risk Disclosure → Investor Awareness → Risk Pricing → Valuation Impact
Cost of Capital Pathway
Higher Transparency → Lower Uncertainty → Lower Cost of Capital
Risk Premium Pathway
Higher ESG Risk → Higher Risk Premium → Higher Discount Rate
Capital Allocation Pathway
Better Disclosure → Investor Confidence → Increased Capital
Scenario Pathway
Climate Scenario → Cash Flow Impact → Valuation Change
Comparability Pathway
Standardized Disclosure → Cross-Company Comparability → Investor Analysis → Capital Allocation Differentiation
ISSB vs CSRD (Very Important)
ISSB
Financial materiality
Investor-focused
Global baseline
CSRD
Double materiality
Regulatory compliance
EU-focused
ISSB focuses on financial relevance, CSRD on broader impact + regulation
ISSB = investor lens CSRD = regulatory + stakeholder lens
Impact on Business & Strategy
Reporting Impact
Integration with financial reporting
Strategic Impact
ESG integrated into decision-making
Investor Impact
Increased scrutiny
ISSB aligns ESG with core financial decision-making
ISSB requires companies to integrate ESG into financial planning, forecasting, and risk management
Link to Financial Impact
Risk → disclosure-driven pricing
Capital → investor decisions
Valuation → model inputs
ISSB is a key mechanism through which ESG affects financial markets
ISSB disclosures directly feed into valuation models, risk assessments, and investment decisions
Challenges & Limitations
Data requirements
Scenario complexity
Global adoption differences
Interpretation challenges
Data consistency risk - ESG disclosures must align with financial assumptions
Misalignment creates credibility issues
Implementation requires integration with financial systems
Key Takeaways
ISSB provides a global baseline for ESG disclosures
Focuses on financial materiality
Built on TCFD structure
Integrates ESG into financial reporting
Impacts risk, valuation, and capital
Critical for investor communication
ISSB defines how ESG risks are priced in financial markets.
If ESG is not disclosed in financial terms, it is not priced correctly.
Example
A company disclosing climate transition risks under IFRS S2 may face higher risk premiums if investors expect significant future costs.