According to NDTV Profit report, the market regulator has received transaction data from stock exchanges and is reviewing trades executed during the closing auction window, which was rolled out recently. In a separate development, SEBI has proposed changes to debt market regulations aimed at providing issuers with greater flexibility in managing repayment schedules and reducing refinancing pressures. SEBI said the move is intended to help issuers, especially non-banking financial companies (NBFCs), better manage cash flows and avoid bunching of debt repayments. Under the proposed framework, issuers would be allowed up to 12 ISINs for plain vanilla debt securities, compared with the current limit of nine. An additional five ISINs would be permitted for instruments such as structured debt securities, market-linked debentures, floating-rate bonds, zero-coupon bonds and debt capital instruments.