NO.PZ2020021205000036
问题如下：
Why are there economies of scale in trading derivatives?
解释：
To change the delta of a portfolio of derivatives dependent on a particular asset, a single trade in the underlying asset is required. This is true regardless of the size of the portfolio.
老师好，乍一看以为是规模效应，手上期权数量多能覆盖更多成本。但看了英文解释，咋觉得没有啥规模效应解释意思，能否请您翻译一下。
