1.交易成本:股票手續費、證交稅
2.交易成本 = (買進總金額✖手續費率✖折扣) + (賣出總金額✖手續費率✖折扣) + (賣出總金額✖交易稅率)
3.零股交易跟買賣整張股票一樣
4.降低交易成本的2個方法
Podcast搭配完整圖文：
https://jiucaimate.com/invest/stock-5/
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