https://www.investopedia.com/ask/answers/sell-open-buy-close-buy-open-sell-close-mean/
比如:
sell to open - writing put (SOXL 18 Mar 22 @$40 C, for $3.05)
buy to close - buying call (FB 18 Feb 22 @210 C, for -$13.75, 假设早时候你已卖过 covered call)
https://www.investopedia.com/ask/answers/sell-open-buy-close-buy-open-sell-close-mean/
比如:
sell to open - writing put (SOXL 18 Mar 22 @$40 C, for $3.05)
buy to close - buying call (FB 18 Feb 22 @210 C, for -$13.75, 假设早时候你已卖过 covered call)