Group 1 - The number of free cash flow themed ETFs has increased to 21 within approximately four months, with 18 of them already closed for subscription, collectively raising over 10 billion yuan [1][2] - Several ETFs, including those from Huatai-PB, Southern Fund, and Da Cheng Fund, were launched and closed for subscription on the same day, with initial subscription sizes ranging from 4.41 billion yuan to 19.09 billion yuan [2][3] - Individual investors dominate the subscription of these ETFs, with personal holdings exceeding 90% in several funds [3][4] Group 2 - The ETFs are linked to a diverse range of indices, including the CSI All Share Free Cash Flow Index and the CSI 800 Free Cash Flow Index, among others [4] - The current market includes three more free cash flow ETFs still in the subscription phase, with varying closing dates [3][4] - As of April 27, four free cash flow ETFs have been listed for trading, with some experiencing significant growth in scale compared to their initial offerings [5][6]