CLOSINGBALANCEMONTH Evaluates the expression at the last date of the month in the current context.
Syntax
CLOSINGBALANCEMONTH(expression,dates[,filter])
Parameters
Expression – An expression that returns a scalar value.
Dates – A column that contains dates.
Filter – (optional) An expression that specifies a filter to apply to the current context.
Return Value
A scalar value that represents the expression evaluated at the last date of the month in the current context.
Reference Data
https://docs.microsoft.com/en-us/dax/dax-function-reference