Rolf Banz on investment
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UBS on active management: myth busters?

By Rolf on 1 November 2017

It has again been a very long time since my last post. Sorry again. But I have now decided that it might be fun to get involved in the ongoing discussion over the merits of active management, particularly since so much of it is self-serving nonsense — incidentally on both sides. UBS has now weighed […]

Posted in Active/passive management, Essays | Tagged Alpha, Market efficiency, Small caps | 4 Responses

How to ensure poor performance

By Rolf on 10 November 2015

This “case study” is taken from a piece that I wrote for a client who found it too negative. It describes the way that many “active” equity portfolios are managed. It may seem like a caricature to some, unfortunately it is not. Thus, it is not surprising that so many fail to perform. Consider a […]

Posted in Active/passive management, Comments/ramblings | Tagged Alpha, Performance

Risk adjustment as an excuse

By Rolf on 25 March 2013

Risk adjustment is a fundamental element of modern portfolio theory. Alpha is defined as the return left over after the impact of all sources of risk, including strategic biases, has been accounted for (see the examples in my series on alpha). But a positive historical alpha alone is not sufficient to conclude that a particular […]

Posted in Active/passive management | Tagged Alpha, Manager selection, Performance, TAA

Alpha in tactical asset allocation

By Rolf on 9 August 2012

It is easy to beat the benchmark of a balanced portfolio in the long run. All we have to do is systematically overweight the riskier asset classes to capture their higher risk premiums. This may add some volatility but will almost certainly lead to a better long-term performance. Many years ago, I suggested this approach […]

Posted in Active/passive management | Tagged Alpha, Asset allocation, Performance, TAA

Alpha in single asset class portfolios

By Rolf on 10 June 2012

Active managers try to outperform their benchmark through various active bets. They obviously need to be skilled in order to be successful. But skill is not the only possible driver of active bets. Some will be the result of biases. As investors, we need to be able to untangle the impact of skill – alpha […]

Posted in Active/passive management | Tagged Alpha, Market efficiency, Performance, Style bias

Alpha – real and fake

By Rolf on 15 May 2012

A few weeks ago, a friend asked me what I thought about a recently published study, entitled “The value of the hedge fund industry to investors, markets and the broader economy”. Written by the Centre for Hedge Fund Research of the Imperial College in London, it is published by KPMG and the Alternative Investment Management […]

Posted in Active/passive management | Tagged Alpha, Hedge funds, Performance

About this weblog and its author

Rolf Banz spent his career in the investment industry in the US, the UK and, most recently, in Switzerland. To older people, he is known as the "father of the small firm effect". This weblog consists of a series of essays and shorter pieces on a range of issues at the intersection of institutional investment and investment theory. Please see this post for a description of the objectives of the weblog and the About page for further information on the author and the site.

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