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Portfolio Optimization for a momentum strategy.

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 Jacques Joubert, Jnr Programmer & Co-Founder at Hedge Funds South Africa

 Tuesday, June 23, 2015

By Rujeko Musarurwa It is nearly impossible to get the right mix of stocks to achieve maximum returns. A lot of time and effort has been spent trying to renovate and build upon old theories in orde...


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2 comments on article "Portfolio Optimization for a momentum strategy. "

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 Johan Kretz, Senior Investment Manager at Deutsche Bank

 Thursday, July 9, 2015



Hi there,

Thank you for highlighting a very interesting topic indeed. Just a few reflections.

You mentioned some company specific factors (P/B, Rev vol, etc) that Sagi (2007) found correlated with future stock returns. A lot has happened in the field of beta factors since then and there are nowadays quite a vivid flora of beta factors (JPM is using 72 different ones if i remember correctly).

Hence, it might be beneficial to test some of these in combination with Momentum for the weighting of stocks in the portfolio.

How do you define Momentum in your models? Do you use the ex-post return between to fixed dates (historical quarterly returns), or MA or MACD or something else?

Regarding the actual optimisation. My experience is that the portfolio gets very sensitive to changes in exp return and variance. What are your thoughts about how stabilise the optimisation in order to make it robust?

Kind regards,

Johan


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 Jacques Joubert, Jr Programmer at I-Sixty

 Wednesday, July 22, 2015



Hi Johan,

Thank you for the comment. You posted the same comment on the blog and I made sure we answered there.

Kind regards

Jacques

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