Mon, Apr 23, 2018
A A A
Welcome Guest
Free Trial RSS
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   |   
Today's Exclusives Today's Other Voices More Exclusives
Previous Opalesque Exclusives                                  
More Other Voices
Previous Other Voices                                               
Access Alternative Market Briefing

 



  • Top Forwarded
  • Top Tracked
  • Top Searched
  1. Investing - Sequoia takes Facebook stake as shares slide in data controversy, $1.4b hedge fund sees intact fundamentals for Facebook, Jim Cramer reveals some 'suggested hedge fund trades' amid the Trump tariffs[more]

    Sequoia takes Facebook stake as shares slide in data controversy From Bloomberg.com: The $4.2 billion Sequoia Fund bought a small position in Facebook Inc. as the stock slid late in the first quarter, investment manager Ruane, Cunniff & Goldfarb told clients. "The recent controversy enab

  2. Activist Investors - Blue Sky-owned Wild Breads faces uncertain future[more]

    From AFR.com: A Blue Sky private equity investment in artisan-style baker Wild Breads enjoyed multiple valuation upgrades despite losing millions and breaching its lending covenants, accounts lodged with the regulator last week show. Wild Breads lost $2.4 million in 2017, but Blue Sky ascribed a hig

  3. Opalesque Exclusive: Barnegat to close hedge fund to outside investors on weak opportunities[more]

    Komfie Manalo, Opalesque Asia: Bob Treue's Barnegat Fund Management said it is closing its $666m fixed income relative value hedge fund to outside investors. "The negative side to gains in Fixed Income Arbitrage is that unless we find new opportunit

  4. Investing - Hedge fund makes a big bet on malls, British hedge fund manager Odey short UK government bonds on QE bet[more]

    Hedge fund makes a big bet on malls From Barrons.com: The dominant narrative on American shopping malls is that they're dead. Crushed by Amazon.com, many brick-and-mortar retail stores are destined for bankruptcy. And where is the most retail, clustered all together? Malls. From a

  5. Performance - Hedge funds suffer first back-to-back loss in two years, Netflix performance burns hedge fund short sellers, Macro hedge fund up 14.5% in first quarter sees dollar falling, Renaissance Technologies rebounds across hedge funds in March[more]

    Hedge funds suffer first back-to-back loss in two years From Bloomberg.com: Hedge Fund returns sank for a second straight month in March, the first back-to-back loss since the first two months of 2016, as trade wars, tech-sector woes and a Fed rate hike dragged down the S&P 500 from its