def METHOD_NAME(self):
    self.system.config.forecast_correlation_estimate["cleaning"] = "False"
    self.system.config.forecast_correlation_estimate["pool_instruments"] = "False"
    self.system.config.forecast_correlation_estimate["min_periods"] = 5000
    instrument_code = "US10"
    ans = self.system.combForecast.get_forecast_correlation_matrices(
        instrument_code
    )
    self.assertTrue(np.isnan(ans.corr_list[0][0][0]))
    self.assertTrue(np.isnan(ans.corr_list[1][0][0]))