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    什麼是美股碎股

    美股交易所最小成交單位是1股，但在一些券商維度中，可以把股票折開成不足1股來交易，這就是美股零碎股。

    通常情況下，美股支持交易零碎股的券商可以交易最小萬分之一（0.0001）股。
    舉個例子，美股帳戶總共有100美元，想購買亞馬遜的股票，現時亞馬遜的股價是2300美元，通過零碎股交易，可以買0.043股亞馬遜股票，雖然不足1股，但也會計入到持倉中，這對小資金的投資者是非常友好的功能。

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