We study whether institutional investors that sign the Principles for Responsible Investment (PRI), a commitment to responsible investing, exhibit better portfolio-level environmental, social, and governance (ESG) scores. Signatories outside of the USA have superior ESG scores than nonsignatories, but US signatories have at best similar ESG ratings, and worse scores if they have underperformed recently, are retail-client facing, and joined the PRI late. US signatories do not improve the ESG scores of portfolio companies after investing in them. Commercial motives, uncertainty about fiduciary duties, and lower ESG market maturity explain why US-domiciled PRI signatories do not follow through on their responsible investment commitments.

We show that mutual funds worldwide provide substantial international exposure through their domestic holdings of multinationals. The international exposure of domestic funds increases, on average, by 32 percentage points when we consider international corporate diversification. We find that funds with higher indirect international exposure perform better in both the cross-section and the time series. This effect is primarily driven by the fund managers’ ability to invest in multinationals, rather than the performance of those multinationals. Our findings support the hypothesis that international diversification from multinationals reduces the transaction and information costs of investing abroad.