def METHOD_NAME(nrows, ncols):
    ret_df = pd.DataFrame(np.random.randn(nrows, ncols),
                          index=pd.date_range('20170101',
                                              periods=nrows, freq='S'),
                          columns=["".join([chr(random.randint(ord('A'), ord('Z'))) for _ in range(8)]) for _ in
                                   range(ncols)])
    ret_df.index.name = 'index'
    ret_df.index = ret_df.index.tz_localize('UTC')
    return ret_df