Boost Market Activity: CDSL aims to boost trading activity by reducing transaction fees, which could encourage more investors to participate in the market and increase liquidity. This is especially important in a growing market where investors and traders are already facing high charges. However, starting from October 1, 2024, the cost of F&O trading will increase due to changes in the Securities Transaction Tax (STT). The STT on option sales will rise from 0.0625 per cent to 0.1 per cent of the premium. Additionally, customers have to pay various charges such as Demat Account Charges of Rs 20 + GST per sell transaction, Call and Trade Charges of Rs 50 per order, GST, Stamp duty, brokerage fees, turnover fees, and many others.