</span>
<span class="sd">            1 year</span>

<span class="sd">        Rolling vol of different window sizes:</span>
<span class="sd">            1 week,</span>
<span class="sd">            1 month,</span>
<span class="sd">            1 quarter</span>

<span class="sd">    :param df:              The dataset of independent variables</span>
<span class="sd">    :type  df:              pd.DataFrame</span>

<span class="sd">    :return:                The DataFrame containing spawned features</span>
<spa