A diverse investor base impacts the effectiveness of large-scale asset purchases
Large-scale asset purchases can impact the price of securities either directly, when securities are targeted by the central bank, or indirectly through portfolio rebalancing by private investors. We quantify both the direct impact and that of portfolio rebalancing, emphasising the role of investor heterogeneity. We use proprietary security-level data on asset holdings of different investors. We measure the direct impact at security level, finding that it is smaller for securities predominantly held by more price-elastic investors, i.e. funds and banks.