SLBM is Automatic Securities and Lending Mechanism introduced by National Stock Exchange. In this Session a client can carryforward their purchase position of previous settlement to next settlement. In this usually client pays Borrowing charges to the lender. A client can also carryforward their short position to corresponding settlement. As per recent guidlines a short position carryforwarded to next settlements can fetch lending charges only in the case when he holds that securities in his accounts or holds eqvivalent amount in his bank. You can also lend monies & can receive returns as lending charges.