RT Journal Article SR Electronic T1 Commentary: Passive Investing and Market Efficiency JF The Journal of Investing FD Institutional Investor Journals SP 7 OP 9 DO 10.3905/joi.2017.26.3.007 VO 26 IS 3 A1 Bradford Cornell YR 2017 UL https://pm-research.com/content/26/3/7.abstract AB In a stock market dominated by passive investors, an interesting question arises as to how the equilibrium level of market efficiency will be maintained. This short article argues that the critical agents in this regard must be the companies that issue the shares, not active investment managers.TOPICS: Security analysis and valuation, passive strategies