PT - JOURNAL ARTICLE AU - Bradford Cornell TI - Commentary: Passive Investing and Market Efficiency AID - 10.3905/joi.2017.26.3.007 DP - 2017 Aug 31 TA - The Journal of Investing PG - 7--9 VI - 26 IP - 3 4099 - https://pm-research.com/content/26/3/7.short 4100 - https://pm-research.com/content/26/3/7.full 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