How can its value remain (on a thoroughly done accounting basis) unchanged ??
Out of favor BCE dropped the full 60 cents today and tacked on 25 more for good measure.
Many folks (in a declining scenario) "hang around" just to get the dividend....then scram.
In a flat market, buying it ex dividend is a bargain of sorts...

Technically your "investment"  (cash plus ex div share) remains the same...but like a bond in rising rates,you have the problem of where to reinvest the dividend...
Sadly no lemonade stands are listed on the TSX