Haircut 100% for bse limited

Why there is 100% haircut on bse limited share in zerodha?

BSE Limited stock was added to the ASM list.

As explained in this support page , the collateral margin for stocks in the ASM list is reduced to zero -

Note: In cases where a stock you have pledged is moved under ASM, you will no longer be provided collateral margins for that stock, because, as per ASM 100% margin should be levied. The collateral value (shown on the trading terminals) will be reduced by the value of collateral received against that stock.