“…First, II measures sentiment at the aggregate level and does not distinguish institutional investor types. Ideally, we would wish to categorize institutional investor types, such as hedge funds, mutual funds, pensions, banks, insurance companies, and independent investment advisors, as sentiments across these groups might differ due to disparate trading strategies and regulatory requirements, potentially leading to differential impacts on the risk–return relation (Asness et al, 2012; Li et al, 2017; Miller et al, 2022; Pan et al, 2018; Wang & Zheng, 2022; Ward et al, 2020). For example, institutions such as banks, insurance companies, and pensions tend to avoid trading risky stocks, signifying that they may contribute less to the aggregate institutional investor sentiment, compared with mutual funds, independent advisors, and hedge funds.…”