Money Market Funds and Shareholder Dilution

  • Author(s): ANDREW B. LYON
  • Published: Apr 30, 2012
  • Pages: 1011-1020
  • DOI: 10.1111/j.1540-6261.1984.tb03889.x


This paper analyzes the effects of a share valuation technique, amortized cost valuation, on institutional money market funds (MMFs) and their investors. The possibility of arbitrage between securities priced at market value and amortized MMFs is investigated. It is found that significant dilution has taken place as a result of this valuation technique. Losses per share have been about 10 basis points per year. Evidence that arbitrageurs will take advantage of a misvaluation of the MMF and cause losses to other shareholders may suggest that some investors should reconsider the desirability of amortized MMFs for their investments.

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