When I am reading question I am simply applying formula and calculating stock value but my answer is wrong because I am not taking decline in growth as -ve. The same concept is being applied in CFAI Volume 4, Q6 and Example 9.
My question is why we are taking decline in dividend growth as –ve.
why wouldn’t you? This is just plug and play, if growth is positive, then g is positive, and vice versa. Then just plug into the equation V0 = D1/(r-g)