Trust is the cornerstone of employee engagement and workplace productivity. According to an HBR study titled "Want Your Employees to Trust You? Show You Trust Them," a lack of trust between managers and employees can have a ripple effect. Employees who feel that they are trusted by their managers have more confidence in the workplace, are more productive, exert more effort, and go above and beyond what is expected from their role.
While managers do a lot to gain the trust of their employees, and also trust their employees, it is important that this trust is manifested in a form which is perceivable by the employee. Unless and until an employee "feels" the trust, s/he will not reciprocate it.