Your materiality assessment tells you what your stakeholders care about. The investors pricing your equity want to know something different: which sustainability factors are financially significant to your specific business in your specific sector. Most companies have never answered that question.

The Matrix That Says Nothing

There is a document somewhere in your sustainability report called a materiality assessment. It probably took months to produce — a stakeholder survey, a consultant, several rounds of internal review. It shows which sustainability topics your company has decided to focus on. It satisfies the GRI requirement. It satisfies the ESRS requirement. It says nothing that any of your peers couldn't have produced with nearly identical inputs.

This is the materiality assessment as it exists at most large companies: a compliance artefact that looks like strategic analysis. Research published in the California Management Review in 2022 put academic language to what practitioners already know. Materiality assessments are "often seen as tick-the-box exercises, needed to comply with reporting standards but not supported by sound methods." Some firms simply copy the practices of peers or outsource the process entirely, producing a generic output that satisfies the form without serving the function (Garst, Maas & Suijs, 2022).

The function is different from what most companies think it is. Done correctly, a materiality assessment is a financially grounded answer to a specific question: which sustainability factors have a significant positive or negative impact on your revenue growth, profitability, required capital, and risk? That is the SASB definition — embedded by the IFRS Foundation into the global investor-focused disclosure standards that the UK, Japan, Australia, and Canada are now formally adopting. It is a fundamentally different question from the one most materiality processes are designed to answer.

What the Market Actually Rewards

The financial evidence on this is one of the most consistent bodies of research in corporate sustainability. Khan, Serafeim, and Yoon published the first empirical test in The Accounting Review in 2016: companies performing well on sustainability issues that are financially material to their sector significantly outperformed peers over time. Companies performing well on immaterial issues showed no outperformance at all (Khan, Serafeim & Yoon, 2016). Materiality, not ESG volume, determined whether sustainability translated into financial results.

Serafeim and Yoon extended this into real-time market behaviour, analysing 111,020 firm-day observations for 3,126 companies between 2010 and 2018. Positive ESG news classified as financially material by SASB sector standards generated an average stock price reaction of +60 basis points on announcement day. ESG news classified as non-material generated no price reaction at all, regardless of how it was communicated or how significant it appeared internally (Serafeim & Yoon, 2022). The market has been providing this signal for over a decade. The same relationship can now be traced at the individual company level, linking specific sustainability factors to a company's stock performance relative to its peers. Most companies haven't structured their sustainability work to receive either signal.

Russell Investments quantified the structural implication directly: for two-thirds of large-cap companies, less than 25% of the data items in conventional ESG scores are actually material to that company's industry. A portfolio sorted on material ESG performance generates four-factor alpha of 1.19%. A portfolio sorted on immaterial ESG performance generates 0.30%. Material and conventional ESG scores correlate at only around 65%, meaning they are measuring meaningfully different things about a company (Russell Investments, 2018). Most sustainability teams are working hard on the part that doesn't move their financial performance.

The Architecture Investors Have Already Built

When the ISSB published IFRS S1 in June 2023, it used a precise definition: "information is material if omitting, misstating, or obscuring it could reasonably be expected to influence decisions that the primary users of general purpose financial reports make." That is the same standard as IFRS accounting materiality. It makes sustainability disclosure an extension of financial disclosure, not a parallel stakeholder communication exercise (ISSB, 2023).

IFRS S1 integrates SASB's 77 sector-specific standards into its implementation guidance. Those standards map which sustainability issues are financially material across 11 sectors and 77 distinct industries. No industry has all 26 general issue categories as material. The point is precisely that: most sustainability issues are not material to most industries. The value of the framework lies in what it excludes, giving companies a rigorous, evidence-based foundation for saying no to sustainability work that isn't financially significant to their specific operations (SASB, 2023).

The world's largest institutional investors have operationalised this exactly. State Street Global Advisors built its R-Factor scoring system specifically to assess companies on financially material, sector-specific ESG issues, explicitly rejecting broad generic ESG scoring as insufficiently actionable. R-Factor covers more than 6,000 listed companies globally and drives proxy voting directly: companies that are laggards on material ESG performance and cannot articulate plans to improve face votes against board members (SSGA, 2020). Board accountability at the world's third-largest asset manager is now contingent on sector-specific material performance — not disclosure volume, not stakeholder survey results.

EY's 2024 Global Institutional Investor Survey of 350 investment decision-makers found that 80% say the materiality of sustainability reporting needs to improve, and that companies provide so much information it is "almost impossible for investors to discern which factors are truly material to the business and therefore likely to impact its valuation" (EY, 2024). The volume of sustainability reporting has grown every year for a decade. The signal-to-noise ratio has not improved, because volume is not the problem.

Why the Compliance Frame Fails You Now

Budget pressure means every hour of sustainability effort that doesn't connect to financial value drivers is an hour that can't survive scrutiny. Political scrutiny means every claim that can't be grounded in financially significant performance is a liability. The programs that survive board reviews in this environment are the ones that can answer "why does this matter to our financial performance?" for every initiative they run. Generic programs built on stakeholder surveys and framework compliance cannot answer that question — and that is a structural problem, not a communication one.

The compliance frame is also conceptually inadequate for what companies actually face. Under CSRD, large European companies now report using double materiality, covering both how sustainability risks affect the business and how the business affects the world. That is a meaningful expansion of reporting scope. But scope and strategy are not the same thing. Double materiality tells a company what to report on. It doesn't tell a company where to concentrate improvement effort, which issues will move its cost of capital, or which factors the investors pricing its equity use to make allocation decisions. Multinationals now comply with both CSRD's double materiality and IFRS S1's financial materiality simultaneously. Both are compliance requirements. Neither one, alone, is a strategy.

George Serafeim's 2022 Harvard Business School working paper stated this directly: "adoption of ESG practices will not raise performance universally in organisations." The value is concentrated in firms that identify and act on specific, material sustainability factors relevant to their competitive position. Firms that broadly report on or invest in all ESG categories don't experience the same effect (Serafeim, 2022). The research from Ioannou and Serafeim adds the competitive dimension: as sustainability practices converge across an industry toward a compliance baseline, the advantage from sustainability erodes unless companies maintain differentiation through strategic material focus (Ioannou & Serafeim, 2021).

Financial materiality is a filter, not a ceiling. It tells you where to concentrate effort, not where to stop. What it produces is a prioritised agenda: the specific sustainability factors where rigorous improvement, credible data, and clear financial translation will generate measurable return. Everything else in your sustainability program may have legitimate reasons to exist. Those reasons should not be confused with what moves your cost of capital, your sustainability ratings, or the allocation decisions of the investors who own your equity.

What a Genuinely Strategic Materiality Process Looks Like

The test of a materiality assessment is not whether it satisfies a reporting standard. It is whether it could defend a budget allocation decision in front of your CFO. A genuine process starts with industry-level financial analysis: the SASB standards for your sector, cross-referenced against the specific factors your key rating agencies consistently measure and your largest institutional investors explicitly engage on. That intersection is your material core — the issues where investor demand, financial evidence, and rating agency assessment all converge.

Freiberg, Rogers, and Serafeim describe materiality as a "process of becoming," not a fixed state (Freiberg et al., 2020). Sustainability issues that are immaterial today can become financially significant as regulatory responses accelerate, input costs shift, or stakeholder reactions reach market-moving scale. A materiality map produced three years ago and filed away has no intelligence about that movement. It is operating on a static picture of which risks are priced and which aren't. The companies that manage materiality well treat it as a living analysis, continuously benchmarked against what the market is actually rewarding in their sector.

BCG's 2023 analysis of approximately 6,700 sustainability announcements from the world's largest companies found that only 20% of companies saw a positive market reaction to 75% or more of their sustainability communications. Nearly a third saw half or more of their announcements destroy shareholder value. The single most powerful differentiator among seven assessed elements of an effective sustainability business case was articulating value creation potential — translating sustainability performance into financial terms (BCG, 2023). That translation is only possible if the underlying work is grounded in financial materiality to begin with. You cannot translate what wasn't framed financially from the start.

The companies managing this well don't produce sustainability strategies separate from business strategy. They identify which sustainability factors are material to their business model and sector, execute rigorously on improving performance against those factors, build defensible data that can withstand scrutiny, and communicate results in the financial language that investors and rating agencies use to make decisions. Every step in that chain depends on the first one. If the materiality analysis was designed to satisfy a framework rather than answer a financial question, everything downstream is built on the wrong foundation.

The Question That Decides Everything Else

Your materiality assessment answers one of two questions: what do your stakeholders think is important, or which sustainability factors are financially significant to your specific business in your specific sector. They produce different outputs, support different decisions, and hold up very differently when someone with authority over your budget, your board seat, or your cost of capital asks you to justify the work.

Which question did yours answer?

References

• Khan, M., Serafeim, G. & Yoon, A. (2016). "Corporate Sustainability: First Evidence on Materiality." The Accounting Review, Vol. 91, No. 6, pp. 1697–1724.
• Serafeim, G. & Yoon, A. (2022). "Which Corporate ESG News Does the Market React To?" Financial Analysts Journal, Vol. 78, No. 1.
• Grewal, J., Hauptmann, C. & Serafeim, G. (2021). "Material Sustainability Information and Stock Price Informativeness." Journal of Business Ethics, Vol. 171, pp. 513–544.
• Russell Investments (2018). "Materiality Matters: Targeting the ESG Issues That Impact Performance."
• Garst, J., Maas, K. & Suijs, J. (2022). "Materiality Assessment Is an Art, Not a Science." California Management Review, Vol. 65, No. 1, pp. 64–90.
• Ioannou, I. & Serafeim, G. (2021). "Corporate Sustainability: A Strategy?" Harvard Business School Working Paper No. 19-065.
• Freiberg, D., Rogers, J. & Serafeim, G. (2020). "How ESG Issues Become Financially Material to Corporations and Their Investors." Harvard Business School Working Paper No. 20-056.
• Amel-Zadeh, A. & Serafeim, G. (2018). "Why and How Investors Use ESG Information." Financial Analysts Journal, Vol. 74, No. 3, pp. 87–103.
• IFRS Foundation / ISSB (2023). IFRS S1 General Requirements for Disclosure of Sustainability-related Financial Information.
• IFRS Foundation / SASB (2023). SASB Standards: Industry-Specific Financial Materiality.
• State Street Global Advisors (2020). R-Factor: Reinventing Sustainable Investing Through Responsible Factor Scoring.
• Busco, C., Consolandi, C., Eccles, R.G. & Sofra, E. (2020). "A Preliminary Analysis of SASB Reporting." Journal of Applied Corporate Finance, Vol. 32, No. 2, pp. 117–125.
• BCG (2023). "Investors Want to Know Your Sustainability Business Case."
• EY (2024). Global Institutional Investor Survey.
• Serafeim, G. (2022). "ESG: Hyperboles and Reality." Harvard Business School Working Paper No. 22-031.