Exclusionary screening
What is Exclusionary screening?
Exclusionary screening removes issuers, sectors, countries, or activities from an eligible investment universe according to defined criteria.
A platform should show both excluded portfolio weight and the economic exposure that remains through diversified funds, subsidiaries, suppliers, or revenue below a threshold. This avoids a false clean-versus-unclean classification and makes the consequences for tracking error and diversification visible. Threshold changes should be versioned, dated, explained, and applied consistently.
Breaches and temporary exceptions require complete transparent resolution records.
How screens are designed
Screens may reflect law, international norms, client values, product objectives, or risk appetite. They can use absolute prohibition, revenue thresholds, ownership links, conduct tests, or sovereign criteria. Definitions matter: production, distribution, financing, reserves, and services create different exposure. A screen should state its scope, threshold, data source, and effective date.
Implementation choices
The policy may apply to direct holdings, all securities of an issuer, subsidiaries, parents, funds, derivatives, or new purchases only. Index funds and mandates can limit implementation. Existing positions may be sold immediately, run off, or placed under engagement. Exceptions need governance and disclosure or they can undermine consistency and invite selective application.
Portfolio consequences
Exclusions alter benchmark-relative weights, diversification, factor exposure, tracking error, turnover, and tax. A broad screen can concentrate the remaining portfolio or remove a useful hedge. Historical performance depends heavily on the excluded sector's cycle. Investors should evaluate both stated values alignment and the financial consequences rather than promise costless implementation.
Effect on the real world
Selling a liquid security mainly transfers ownership and does not directly remove company financing. Widespread exclusion may affect reputation or cost of capital, but evidence and magnitude vary. Screens can signal norms and satisfy investor constraints, yet should not automatically be reported as reduced real-world harm. Engagement, policy, consumption, and primary financing use different channels.
Practical governance
Maintain an auditable restricted list, issuer mapping, review frequency, exception log, pre-trade controls, and breach process. Test funds and corporate groups on a look-through basis where data allow. Report unclassified exposure and methodological changes. Avoid using stale classifications, applying a percentage threshold without defining denominator, or describing below-threshold exposure as zero.
Sources and further reading
- What is responsible investment?, Principles for Responsible Investment