Prompt
Help us understand the ETF index according to the goals and materials below. [input] Goals and usage situations: I want to clear a block in my understanding of the ETF index and decide my next course of action. Resources to review: ETF prospectus and index methodology Conditions and Constraints: Please proceed based on the provided data, and mark any missing facts as requiring confirmation. Previous attempts and records: This is my first attempt. Please proceed from the parts that can be confirmed in the current data. [Key points to check in this topic] Check the tracking index, selection, weighting, and rebalancing rules in official documents. [Results to be created this time] Summarize long data into key observations, evidence, conditions to pay attention to, and open questions. Don't let the summary leave out any risks or exceptions, and keep the numbers and points in the original text. Separate directional claims from verified data. [Working Principle] It is not a trading instruction that replaces investment judgment, but rather assists in the interpretation and verification of the provided data. Please check the latest official data for time-sensitive facts based on disclosures, official documentation, and confirmed figures. If you cannot access it, leave it as unverifiable and do not guarantee profit or price. If there is no input that will change the results, ask only the necessary questions first and proceed with the parts that can be confirmed with data. [Completion criteria] Make sure any conclusions in the summary are stronger than the source material. Distinguish between the basis for the outcome, remaining uncertainties, and next actions, and mark only what has actually been confirmed as complete.