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This paper exploits a novel dataset covering the universe of transactions in the Colombian Stock Exchange to analyze episodes of additions to and deletions from MSCI equity indexes. The analysis finds that additions and deletions have large price effects: the median cumulative abnormal return in absolute value is 5.5 percent. The paper shows that these price effects are due to large demand shocks by different classes of international investors—not only passive funds and ETFs, but also active mutual funds, pension funds and government funds—which are not absorbed by arbitrageurs. Consistent with recent asset pricing models with limits to arbitrage, stock demand curves are estimated to be very inelastic: the demand elasticity for the median stock in the sample is −0.34, implying that a 1 percent increase in the demand for the stock increases its price by 2.9 percent.

We study the effects of sovereign debt inflows on domestic firms. To do so, we exploit episodes of large sovereign debt inflows, which follow the announcements of the inclusion of six emerging countries into major sovereign debt indexes. We find that these events reduce government bond yields, appreciate the domestic currency, and have heterogeneous stock-market effects on domestic firms. Firms operating in tradable industries experience lower returns than firms in non-tradable industries. In addition, financial firms, government-related firms, and firms that rely more on external financing experience higher returns. The effect on financial and government-related firms is stronger in countries that display larger reductions in government bond yields. The effect on tradable firms is stronger in countries that display stronger appreciations. We provide a stylized model that rationalizes these results. Our findings shed novel light on the channels through which sovereign debt inflows affect firms in emerging countries. ; Pandolfiand Williams acknowledge support from the Einaudi Institute for Economics and Finance (2017 EIEF research grant) and the Columbian College Facilitating Fund from George Washington University. Broner and Martin acknowledge support from the Spanish Ministry of Economy, Industry, and Competitiveness through the I + D Excelencia grant (ECO2016–79823-P), the Spanish Ministry of Science and Innovation through the Severo Ochoa Programme for Centers of Excellence in R&D grant (CEX2019–000915-S), the Generalitat de Catalunya (AGAUR grant 2017-SGR0–1393), the CERCA Programme/Generalitat de Catalunya, and the Barcelona GSE Research Network. Martin also acknowledges support from the European Research Council under EU Seventh Frame-work Programme (FP7/2007–2013) ERC Consolidator Grant (615651-MacroColl).