# Non-linear shrinkage of the price return covariance matrix is far from optimal for portfolio optimization

> Research article (Finance research letters, 2022) · cited 14× · AI/ML

**Wikidata**: [openalex:W4300167525](https://www.wikidata.org/wiki/openalex:W4300167525)  
**Source**: https://4ort.xyz/entity/non-linear-shrinkage-of-the-price-return-covariance-matrix-is-far-from-optimal-for-portfolio-optimization