Vanguard Core Tax-Exempt Bond E (VCRM) is an exchange-traded fund in the Muni National Long category. It has $1.71B in assets, an expense ratio of 0.12% and a 3.61% dividend yield. Under normal circumstances, the fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in debt securities that are primarily issued by U.S. states, local governments, or agencies and whose interest is exempt from federal income taxes and the federal alternative minimum tax (AMT). It is non-diversified.