TY  - UNPD
A1  - Hautsch, Nikolaus
A1  - Voigt, Stefan
T1  - Large-scale portfolio allocation under transaction costs and model uncertainty
T2  - Center for Financial Studies (Frankfurt am Main): CFS working paper series ; No. 582
N2  - We theoretically and empirically study large-scale portfolio allocation problems when transaction costs are taken into account in the optimization problem. We show that transaction costs act on the one hand as a turnover penalization and on the other hand as a regularization, which shrinks the covariance matrix. As an empirical framework, we propose a flexible econometric setting for portfolio optimization under transaction costs, which incorporates parameter uncertainty and combines predictive distributions of individual models using optimal prediction pooling. We consider predictive distributions resulting from highfrequency based covariance matrix estimates, daily stochastic volatility factor models and regularized rolling window covariance estimates, among others. Using data capturing several hundred Nasdaq stocks over more than 10 years, we illustrate that transaction cost regularization (even to small extent) is crucial in order to produce allocations with positive Sharpe ratios. We moreover show that performance differences between individual models decline when transaction costs are considered. Nevertheless, it turns out that adaptive mixtures based on high-frequency and low-frequency information yield the highest performance. Portfolio bootstrap reveals that naive 1=N-allocations and global minimum variance allocations (with and without short sales constraints) are significantly outperformed in terms of Sharpe ratios and utility gains.
T3  - CFS working paper series - 582 
KW  - portfolio choice
KW  - transaction costs
KW  - model uncertainty
KW  - regularization
KW  - high frequency data
Y1  - 2017
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/43868
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-438687
UR  - https://ssrn.com/abstract=3043216
IS  - September 26, 2017
PB  - Center for Financial Studies
CY  - Frankfurt, M.
ER  -