ODDLYIELD stands for "Odd Last Period Yield". It calculates the annual yield of a bond when the last period before maturity is irregular — either shorter or longer than a normal coupon schedule. In simple words: If a bond’s last payment doesn't fit into a clean, regular schedule, ODDLYIELD helps you find the true return you will earn.

The IFERROR function is a built-in Excel tool designed to catch errors in formulas and replace them with a custom result — often a blank cell, a message, or a calculated alternative. It helps you control what your audience sees, maintaining a clean presentation even when underlying formulas produce errors.

The IF function allows you to perform logical tests and return different outcomes based on whether that test is true or false.

At its core, the COUNTIFS function is designed to count the number of cells that meet multiple conditions. Unlike its simpler counterpart, COUNTIF, which only evaluates a single criterion, COUNTIFS can handle multiple criteria simultaneously. This makes it an invaluable asset for complex data analysis tasks.

The AND function is a logical function in Excel that returns TRUE if all specified conditions are met; otherwise, it returns FALSE. This capability is especially useful when you want to assess multiple conditions simultaneously, enabling efficient data analysis.