"deterioration of confidence" is correct and usable in written English.
You can use it to describe a situation where an individual begins to lack confidence in themselves, a situation, or a particular area of their life. For example, "The prolonged period of unemployment led to a gradual deterioration of confidence in her ability to find suitable work".
The banking system has not been able to withstand the trials it has faced as a result of difficult market conditions, global deterioration of confidence in economic affairs, and domestic risk appetite.
Therefore, high levels of burnout in doctors can lead to poor performance, medical errors, decreased quality of medical care and deterioration of confidence in health services [ 1, 2, 4, 12, 14- 17].
There have been other challenges since, both personal and professional, including his son Ben's autism and the deterioration of his confidence and results on the course.
Deterioration of investor confidence in the United States could also hurt the value of the dollar, according to William H. Gross, co-chief investment officer of Pimco, a bond fund based in California.
The animator and masters graduate of CalArts pieces together the deterioration of one's self-confidence by showcasing one-man stand-up shows to incorporating the "formulas" required for love and friendship. .
The rate of the deterioration in confidence lost some pace, however, as German economic sentiment improved and returned to September levels.
"Perhaps the more difficult challenge is to capture the broader risks the institution might confront in conditions of a general deterioration in confidence in credit and an erosion in liquidity," Mr. Geithner said in the speech.
Even more alarming than the deterioration in the share price is the crisis of confidence in Enron's reliability as a trading partner in worldwide energy markets.
In the author's opinion, this temporal deterioration could be due to the increased use and availability of complex diagnostic technology 8 9 as well as the concurrent loss of confidence in physical examination skills.
