The Reserve Bank on Monday said asset quality of banks improved further and their gross non-performing assets (GNPA) or bad loans ratio declined to a 12-year low of 2.6 per cent in September 2024 on the back of falling slippages and steady credit demand.The RBI also flagged concern over a sharp rise in write-offs, especially among private sector banks (PVBs), which could be partly masking worsening asset quality in unsecured lending segment and dilution in underwriting standards.