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arXiv 2103.05455math.OCq-fin.PM
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线性约束可分Optimization投资组合的构造

Portfolio Construction as Linearly Constrained Separable Optimization

Nicholas Moehle, Jack Gindi, Stephen Boyd, Mykel Kochenderfer

摘要:

均值-方差投资组合最优化问题通常涉及可分离的非凸项,包括资本收益惩罚、整数份额约束、最小头寸和交易规模。我们提出了一个启发式算法的基础上的交替方向法的乘法器(ADMM)。这种方法允许在几十到几百毫秒的时间内解决大约1000个证券和100个风险因素。我们也得到了一个界限上的可实现的性能。我们的启发式和界都来自于其他最优化问题与一个可分离的目标和仿射等式约束的类似结果。我们讨论了一个具体的实施的情况下,在目标中的可分离的条款是分段二次的,我们实证证明其有效性的税收意识的投资组合建设。

英文摘要:

Mean-variance portfolio optimization problems often involve separable nonconvex terms, including penalties on capital gains, integer share constraints, and minimum position and trade sizes. We propose a heuristic algorithm for such problems based on the alternating direction method of multipliers (ADMM). This method allows for solve times in tens to hundreds of milliseconds with around 1000 securities and 100 risk factors. We also obtain a bound on the achievable performance. Our heuristic and bound are both derived from similar results for other optimization problems with a separable objective and affine equality constraints. We discuss a concrete implementation in the case where the separable terms in the objective are piecewise quadratic, and we empirically demonstrate its effectiveness for tax-aware portfolio construction.

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