1. HierPortfolios::daily_returns
    Daily returns (in percentage) of 15 assets.
  2. HierPortfolios::mldp_returns
    Returns of 10 simulated assets.
  3. RobGARCHBoot::returns3
    Matrix of time series returns for illustrative purposes
  4. RobGARCHBoot::returnsexample
    Time series returns for illustrative purposes