To cite package ‘quantmod’ in publications use:

Ryan JA, Ulrich JM (2025). quantmod: Quantitative Financial Modelling Framework. R package version 0.4.29, https://github.com/joshuaulrich/quantmod.

Corresponding BibTeX entry:

  @Manual{,
    title = {quantmod: Quantitative Financial Modelling Framework},
    author = {Jeffrey A. Ryan and Joshua M. Ulrich},
    year = {2025},
    note = {R package version 0.4.29},
    url = {https://github.com/joshuaulrich/quantmod},
  }