@article{sectoralportfoliooptimizationbyjudicious,
  title = {Sectoral portfolio optimization by judicious selection of financial ratios via PCA},
  author = {Vrinda Dhingra and Amita Sharma and Shiv K. Gupta},
  year = {2021},
  eprint = {2106.11484},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2106.11484v2},
}