Nothing is stressful unless it is perceived as being a thread (losing money)
Worry has a great effect on human performance, because it represents conscious mental activity. Since it is conscious, it takes up processing capacity.
Often, the trader is too preoccupied with the potential results of what he id doing, rather than the process of being a trader.
Losses scare me. The model calms me. Trade your plan.
Concerned about losses. Preoccupation. Tunnel vision
View losses as negative because fear of not having money. A loss is a character building exercise that is needed to go through to obtain positive expectancy.