麦高视野：ETF观察日志(2025-07-11)

• The report introduces the RSI (Relative Strength Index) as a quantitative factor, constructed to measure market conditions by comparing average gains and losses over a 12-day period. The formula is: $ RSI = 100 - 100 / (1 + RS) $ where RS represents the ratio of average gains to average losses over the specified period. RSI values above 70 indicate overbought conditions, while values below 30 suggest oversold conditions [2] - Another quantitative factor mentioned is Net Purchase Amount (NETBUY), which calculates the net inflow or outflow of funds for ETFs. The formula is: $ NETBUY(T) = NAV(T) - NAV(T-1) * (1 + R(T)) $ where NAV(T) is the net asset value of the ETF on day T, NAV(T-1) is the net asset value on the previous day, and R(T) is the return on day T [2] - The report also tracks Institutional Holdings Ratio, which estimates the proportion of ETF shares held by institutions based on the latest annual or semi-annual reports. This excludes holdings by linked funds and may involve approximations due to data limitations [3] - The report provides daily intra-day price trends for ETFs using 5-minute interval data, highlighting the highest and lowest prices of the day with red markers. However, some data gaps may exist due to limitations in the source [2] - The report categorizes ETFs into "Broad-based" and "Thematic" groups based on the indices they track, such as major indices like CSI 300, CSI 500, and industry-specific indices like Non-bank Financials and Red Chips [2] - The report includes a detailed table of ETF performance metrics, such as RSI values, net purchase amounts, trading volumes, management fees, institutional holdings ratios, and T+0 trading availability. For example, the RSI for CSI 300 ETFs ranges from 68.14 to 75.77, while institutional holdings ratios vary significantly across ETFs [4] - The report highlights thematic ETFs such as Consumption Electronics, Non-bank Financials, Renewable Energy, Semiconductors, and Artificial Intelligence, providing metrics like RSI, net purchase amounts, and institutional holdings ratios. For instance, the RSI for Consumption Electronics ETFs ranges from 59.68 to 60.40, while institutional holdings ratios range from 23.10% to 58.47% [6] - The report also includes performance metrics for international ETFs tracking indices like the Hang Seng, Nikkei 225, Nasdaq 100, and S&P 500, with RSI values ranging from 46.50 to 72.83 and institutional holdings ratios varying widely [4][6]