On December 4, 2025, the first batch of funds themed around the Beijing Stock Exchange (BSE) will enter a new open subscription window. These eight funds, which were established in 2021, have delivered an average cumulative return of over 100% in the past two years.

At present, publicly - offered funds are steadily expanding their product allocation in the BSE market. The term "product layout" here is more accurately rendered as "product allocation" to convey the strategic distribution of investment products. This year, the number of funds linked to the BSE 50 Index has reached 15. Moreover, the launch of BSE 50 Exchange - Traded Funds (ETFs) is on the horizon, which is set to further enrich the investment ecosystem of the BSE.

Explanation: 1. “open window period” is changed to “open subscription window”. In the financial context, when it comes to funds, “open subscription window” is a more commonly used and precise term to describe the time when investors can subscribe to the funds. 2. “have achieved an average cumulative return exceeding 100%” is rephrased to “have delivered an average cumulative return of over 100%”. “Deliver” is a more natural verb in financial reporting when talking about the performance of funds. 3. “public funds” is specified as “publicly - offered funds” to make the meaning clearer. 4. “product layout” is explained in the original text, and here it is directly translated as “product allocation” in the main text to avoid redundancy and make the sentence more fluent. 5. “funds related to the BSE 50 Index” is changed to “funds linked to the BSE 50 Index”. “Linked to” is a more common and natural collocation in financial English. 6. “the launch of BSE 50 ETFs is also on the horizon” is slightly adjusted to “Moreover, the launch of BSE 50 Exchange - Traded Funds (ETFs) is on the horizon”. Adding “Moreover” makes the logical connection between sentences clearer, and spelling out “Exchange - Traded Funds” with the abbreviation in parentheses helps readers who may not be familiar with the term “ETFs”.