Kim Deal, a foreign exchange $($FX$)$ trader working at AMBS hedge fund in New York, US$,$ claims persistent violations of the unbiasedness hypothesis for USD $($U$.$S$.$ dollar$)$ and MXN $($Mexican Peso$)$ in the market. Some financial economists argue that such violations are the results of a reward for taking risks. Critically evaluate this contention of financial economists on Kim Deal$$s discovery.