# EAD = Drawn amount + Undrawn amount * CCF?

I am pretty sure the following is true $$\text{EAD} = \text{Drawn Amount} + \text{Undrawn Amount} \times CCF$$ where $$\text{CCF}$$ is the credit conversion factor. It means if an overdraft line is drawn to 500 EUR & its limit is 1000 EUR with CCF = 0.5, EAD is 750 EUR.

Unfortunately, I have a really hard time finding a reference for that.

Is there any Basel paper or similar which shows that the equation above holds or possibly an alternative version if my formula is incorrect?