Fri, Mar 29, 2024
A A A
Welcome Guest
Free Trial RSS pod
Get FREE trial access to our award winning publications
Industry Updates

EDHEC-Risk study finds no theoretical or empirical justification for cap-weighted indices

Tuesday, June 29, 2010
Opalesque Industry Update - After the financial crisis and the accompanying falls in the stock markets, many commentators have questioned the appropriateness of tracking cap-weighted indices. These indices are particularly inefficient and, through their momentum properties, favour the emergence of speculative bubbles.

New research from the EDHEC-Risk Institute shows that financial theory, despite widely-held views to the contrary, does not support investment in these types of indices. It is therefore urgent for investors to seek alternatives to these indices which are justified by neither fact nor theory.

The three main conclusions of the research are the following:

1.A cap-weighted stock market index is not the market portfolio of financial theory (the Capital Asset Pricing Model (CAPM) theory is often evoked to show that cap-weighted stock market indices are efficient portfolios and attractive investments). That it is not is clear from the choices made in empirical studies that attempt to come up with reasonable proxies for the market portfolio. These studies attach great importance to including many more stocks than indices do, and their proxies of the market portfolio include bonds, real estate, and non-tradable assets such as human capital.

2.Even if it were possible to construct and hold the market portfolio, the theory does not predict that the market portfolio is efficient unless we make highly unrealistic assumptions. In fact, the authors of the seminal academic research in the 1950s and 1960s, Harry Markowitz and William Sharpe, have themselves emphasised (Sharpe (1991) and Markowitz (2005)) that the market portfolio may not be efficient in a more realistic setting.

3.In view of these arguments, financial theory alone does not justify the current practice of cap-weighting. In fact, from a theoretical perspective, cap-weighted stock market indices seem to offer no particular advantage.

The EDHEC-Risk Institute Publication, “Does Finance Theory Make the Case for Capitalisation-Weighted Indexing?” can be downloaded by pressing [Ctrl] and clicking on the following link: Source

- FG

What do you think?

   Use "anonymous" as my name    |   Alert me via email on new comments   |   
Previous Opalesque Exclusives                                  
Previous Other Voices                                               
Access Alternative Market Briefing

 



  • Top Forwarded
  • Top Tracked
  • Top Searched
  1. KKR raises $6.4bn for the largest pan-Asia infrastructure fund[more]

    Laxman Pai, Opalesque Asia: The New York-based global investment firm KKR has raised a record $6.4bn for its second Asia-focused infrastructure fund, underlining investors' continued appetite for private markets. According to a media release from the alternative assets manager, the figure top

  2. Bucking the trend, top hedge fund makes plans for a second SPAC[more]

    From Institutional Investor: SPACs aren't dead. At least not to the folks at Cormorant Asset Management. The life sciences firm, whose hedge fund topped its peers in 2023, is confident it will match the success of its first blank-check company. Last week, the life sciences and biopharma speciali

  3. Benefit Street Partners closes fifth fund on $4.7 billion[more]

    Bailey McCann, Opalesque New York: Benefit Street Partners has closed its fifth flagship direct lending vehicle, BSP Debt Fund V, with $4.7 billion of investable capital across the strategy. Benefit Street invests primarily in privately originated, floating rate, senior secured loans. The fun

  4. 4 hedge fund themes that are working in 2024[more]

    From The Street: A poor earnings report from Tesla (TSLA) has not hurt the indexes on Thursday. The decline in Tesla stock, which is losing its position in the Magnificent Seven pantheon, is more than offset by strong earnings from IBM (IBM) and ServiceNow (NOW) . In addition, the much higher-t

  5. Opalesque Exclusive: A global macro fund eyes opportunities in bonds[more]

    Bailey McCann, Opalesque New York for New Managers: Munich-based ThirdYear Capital rebounded in 2023, following a tough year for global macro. The firm's flagship ART Global Macro strategy finished the year up 1