def METHOD_NAME(data, instrument_code) -> float:
    ts_of_perc_stdev = get_daily_ts_stdev_perc_of_prices(data, instrument_code)
    if len(ts_of_perc_stdev) == 0:
        last_daily_vol = np.nan
    else:
        last_daily_vol = ts_of_perc_stdev.ffill().values[-1]
    return last_daily_vol