mardi 17 mai 2016

A question on some abbreviations in Thinkorswim

Hey everybody,

pretty new here, I'll appreciate if someone answer my question.

When trying to buy/sell a put/call option in TOS platform, there are abbreviations such as M, X, Z, O, ..., next to bid and ask price, What do they mean?


A question on some abbreviations in Thinkorswim

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