Final answer:
A fiduciary is an individual with the authority to conduct a series of transactions of a continuing nature in a range of business matters for his principal.
Step-by-step explanation:
The individual with authority to conduct a series of transactions of a continuing nature in a range of business matters for his principal is a fiduciary.
A fiduciary is someone who is entrusted with the responsibility to act in the best interests of another person or party. They must exercise good faith, loyalty, and honesty in their actions.
For example, a financial advisor who manages investments on behalf of a client is considered a fiduciary.