本帖最后由 闲云野鹤 于 2023-4-4 18:14 编辑 我最近在学习期权交易,买call买put卖call卖put, 极为烧脑,发现这是防止老年痴呆的利器。买call=卖put=看涨, 买put=卖call=看跌, 敌人的敌人就是朋友,十几年前就听 ...
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