The OMO purchases are in line with the central bank’s stated policy of infusing liquidity to the tune of 1% of the net demand and time liabilities (NDTL) in the banking system, a debt fund manager said. Currently, the NDTL of the banking system is about Rs 250 lakh crore. So, the expected liquidity infusion would be about Rs 2.5 lakh crore, fund managers said.