Stock pledging in Zerodha

Why all stocks are not allowed to pledged.

List of Approved Securities for Pledging with Zerodha can be found here:

Stocks with unpredictable Volatility are not allowed for pledging.

Stocks with higher risk have a higher percentage of haircut.

The Risk Department of each brokerage considers the level of risk they can afford to undertake when deciding which stocks are allowed for pledging.