Sat, Apr 18, 2015
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. Tiger Global falls 2.9% in March, down 5.3% in Q1[more]

    From Reuters.com: Investment firm Tiger Global Management, one of the hedge fund industry's most closely watched players, told clients that its hedge fund lost 5.3 percent during the first quarter, an investor said on Wednesday. Much of the decline came in March when the fund lost 2.9 percent,

  2. It’s not just hedge funds—IMF study finds stability risks from ‘vanilla’ funds[more]

    From MarketWatch.com: Leveraged hedge funds and banklike money-market funds are the parts of the asset-management industry most associated with risks to financial stability. But a report from the International Monetary Fund suggests that “plain-vanilla” mutual funds and exchange-traded funds also ca

  3. Hedge funds gain 2.4% in Q1 driven by currency and commodity markets[more]

    Komfie Manalo, Opalesque Asia: Hedge funds posted positive results last March to conclude a strong first quarter, with performance driven by strong macro trends in currency and commodity markets, complemented by broad-based gains and positioning in event driven, equity hedge and fixed income-b

  4. Hedge funds looking to continue their rally in Q2[more]

    Komfie Manalo, Opalesque Asia: Hedge funds finished the first quarter on a strong note and are looking to continue the rally in the second quarter, said Lyxor Asset Management in its Weekly Brief. The Lyxor Hedge Fund Index is up 0.4% over the week

  5. Hedge funds down -0.17% in March (+1.23%YTD)[more]

    Bailey McCann, Opalesque New York: The hedge fund industry produced an aggregate return of –0.17% in March to end Q1 2015 up 1.23%, compared to the S&P 500 which increased 0.96%, according to the latest data from eVestment. Hedge fund performance returns were mixed in March amid increased equity

 

banner