Overdrafts are typically subject to additional:

Overdrafts occur when you withdraw more money from your account than what is available, leading to a negative balance. Financial institutions often charge additional bank fees associated with overdrafts as a way to cover the perceived risk and administrative costs involved in allowing an account to go into a negative balance. This could include a one-time overdraft fee for each transaction that exceeds the available balance, as well as potential daily fees for maintaining an overdraft.

In contrast, the other choices do not accurately relate to the nature of overdrafts. Investment strategies are not applicable to overdrafts as they deal with managing assets and generating returns rather than managing bank account balances. Savings interests are associated with positive account balances, reflecting earnings on deposits rather than costs incurred from going overdrawn. Collateral requirements usually pertain to secured loans, which are not relevant to the relationship between a bank and an account holder experiencing an overdraft situation.