Karachi - Pakistan stocks suffered the biggest setback of the year Tuesday, plunging by 4 per cent amid mounting political uncertainty deepened by the break-up of the ruling coalition, traders said.
Traders said the collapse of the alliance in the parliament and conflicting statements from other small, but key partners of the coalition raised concerns about the fragile democratic system.
"There is an air of uncertainty hanging over the presidential elections," said Ahsan Mehnti, chief executive at Shahzad Chamdia Securities.