V2EX dollar-cost averaging

Dollar-Cost Averaging

定义 Definition

美元成本平均法 / 定期定额投资:一种投资策略,指在固定时间间隔(如每月)投入固定金额去买入某项资产(常见为基金、指数基金或股票)。这样在价格高时买得少、价格低时买得多,从而平滑买入成本、降低一次性择时带来的风险。(也常简称 DCA

发音 Pronunciation (IPA)

/dlr kst vrd/

例句 Examples

I use dollar-cost averaging to invest in an index fund every month.
我用定期定额的方式每月投资一只指数基金。

Instead of trying to time the market, she stuck to dollar-cost averaging through both rallies and downturns, which helped her manage risk and stay disciplined.
她不去试图判断市场时点,而是在上涨和下跌阶段都坚持定投,这帮助她控制风险并保持纪律性。

词源 Etymology

该短语由三部分构成:dollar(美元/金额单位)+ cost(成本)+ averaging(平均化)。字面意思是“把成本做平均”。它在英语金融语境中用来描述“用固定金额、分批买入”以实现“平均买入成本”的方法;虽然以 dollar 命名,但并不局限于美元,也可用于任何货币或金额单位。

相关词 Related Words

文学与著名作品 Literary Works

  • A Random Walk Down Wall Street(Burt Malkiel)讨论个人投资策略时常提及定投/分批投入思路。
  • The Little Book of Common Sense Investing(John C. Bogle)在指数投资与长期纪律性投入的语境中经常出现与 DCA 相近的观点。
  • The Intelligent Investor(Benjamin Graham)强调纪律与长期原则,相关章节常被用来引申说明“分批买入/定额投入”等方法。
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