指数基金也叫ETF（Exchange Traded Fund），是一种投资工具，旨在追踪特定的金融指数。指数基金通常由一家资产管理公司创建，然后通过证券交易所进行交易。指数基金的目标是获得与其所追踪的指数相似的投资回报率。

指数基金的优势在于其低成本和高流动性。由于指数基金的投资策略是 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 passively managed，即 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