What drives mutual fund asset concentration?
Is the large influence that mutual funds assert on the U.S. financial system spread across many funds, or is it is concentrated in only a few? We argue that the dominant economic factor that determines this is market efficiency, which dictates that fund performance is size independent and fund growt...
| Main Authors: | , |
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| Format: | Journal article |
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2008
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| _version_ | 1797103980752404480 |
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| author | Schwarzkopf, Y Farmer, J |
| author_facet | Schwarzkopf, Y Farmer, J |
| author_sort | Schwarzkopf, Y |
| collection | OXFORD |
| description | Is the large influence that mutual funds assert on the U.S. financial system spread across many funds, or is it is concentrated in only a few? We argue that the dominant economic factor that determines this is market efficiency, which dictates that fund performance is size independent and fund growth is essentially random. The random process is characterized by entry, exit and growth. We present a new time-dependent solution for the standard equations used in the industrial organization literature and show that relaxation to the steady-state solution is extremely slow. Thus, even if these processes were stationary (which they are not), the steady-state solution, which is a very heavy-tailed power law, is not relevant. The distribution is instead well-approximated by a less heavy-tailed log-normal. We perform an empirical analysis of the growth of mutual funds, propose a new, more accurate size-dependent model, and show that it makes a good prediction of the empirically observed size distribution. While mutual funds are in many respects like other firms, market efficiency introduces effects that make their growth process distinctly different. Our work shows that a simple model based on market efficiency provides a good explanation of the concentration of assets, suggesting that other effects, such as transaction costs or the behavioral aspects of investor choice, play a smaller role. |
| first_indexed | 2024-03-07T06:27:46Z |
| format | Journal article |
| id | oxford-uuid:f4e7f527-6f65-493c-81f5-94a3c6b956dc |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:27:46Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:f4e7f527-6f65-493c-81f5-94a3c6b956dc2022-03-27T12:23:19ZWhat drives mutual fund asset concentration?Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f4e7f527-6f65-493c-81f5-94a3c6b956dcSymplectic Elements at Oxford2008Schwarzkopf, YFarmer, JIs the large influence that mutual funds assert on the U.S. financial system spread across many funds, or is it is concentrated in only a few? We argue that the dominant economic factor that determines this is market efficiency, which dictates that fund performance is size independent and fund growth is essentially random. The random process is characterized by entry, exit and growth. We present a new time-dependent solution for the standard equations used in the industrial organization literature and show that relaxation to the steady-state solution is extremely slow. Thus, even if these processes were stationary (which they are not), the steady-state solution, which is a very heavy-tailed power law, is not relevant. The distribution is instead well-approximated by a less heavy-tailed log-normal. We perform an empirical analysis of the growth of mutual funds, propose a new, more accurate size-dependent model, and show that it makes a good prediction of the empirically observed size distribution. While mutual funds are in many respects like other firms, market efficiency introduces effects that make their growth process distinctly different. Our work shows that a simple model based on market efficiency provides a good explanation of the concentration of assets, suggesting that other effects, such as transaction costs or the behavioral aspects of investor choice, play a smaller role. |
| spellingShingle | Schwarzkopf, Y Farmer, J What drives mutual fund asset concentration? |
| title | What drives mutual fund asset concentration? |
| title_full | What drives mutual fund asset concentration? |
| title_fullStr | What drives mutual fund asset concentration? |
| title_full_unstemmed | What drives mutual fund asset concentration? |
| title_short | What drives mutual fund asset concentration? |
| title_sort | what drives mutual fund asset concentration |
| work_keys_str_mv | AT schwarzkopfy whatdrivesmutualfundassetconcentration AT farmerj whatdrivesmutualfundassetconcentration |