I’m using the following parameters:
Risk free return: .48%
Market return: 8.5%
Beta: .70
D1: 2.16
Plowback ratio: 78%
ROE: 58%
I’m trying to use a basic DDM formula D1 / K-G but I keep getting a negative value.

My friend has a 1972 firebird formula, which has been in storage for 20 years, is free of any rust & in excellent condition. She can’t find how to figure it’s worth, can anyone help me?