What campus protesters get wrong about divestment

Divesting from something has obvious symbolic value. But many protesters hope to have a real-world impact, too. Divestment campaigns may exert influence by starving their targets of capital. Scare enough investors from an industry or country and, so the argument goes, companies will find it harder to raise or borrow money, which will force them to change their behaviour. If enough Israeli firms begin to suffer, perhaps Binyamin Netanyahu will rethink his campaign in Gaza. How likely is this to work?