做品牌該集中火力、還是多點開花？／謝銘元

Jul 1, 2019

假如你持有A、B股票各一張，價格都是100元；今天A股票跌到50元、B股票漲到150元，下一步你會如何選擇？是買進A股票，將平均成本降到75元，還是買進B股票，將平均成本提高到125元？

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