As Venntel, one of the location data brokers that has sold to ICE, puts it, “Commercially available bidstream data from the advertising ecosystem has long been one of the most comprehensive sources of real-time location and device data available.” But the privacy harms of RTB are not just a matter of misuse by individual data brokers. RTB auctions broadcast the average person’s data to thousands of companies, hundreds of times per day, with no oversight of how this information is ultimately exploited. Once your information is broadcast through RTB, it’s almost impossible to know who receives it or control how it’s used.
数据来源于沪深交易所、公开资料等。券商ETF（512000）被动跟踪中证全指证券公司指数，该指数基日为2007.6.29，发布于2013.7.15。中证全指证券公司指数2021~2025年年度涨跌幅分别为-4.95%、-27.37%、3.04%、27.26%、2.54%。指数成份股构成根据该指数编制规则适时调整，其回测历史业绩不预示指数未来表现。
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