A pledge is leverage one level above the company. It never lands on the company's own balance sheet, so a clean set of accounts can still sit under a loaded owner. Open the shareholding pattern and find the pledged column.

Pledged shares are a seller in waiting. The price that pulls the trigger is set by the promoter's lender and his cover ratio, not by anything the company did that quarter.

The selling feeds itself. One forced sale adds supply, supply drops the price, the drop trips the next call. A high pledge turns an ordinary bad week into a stampede.