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?

anybody?

thebeardman said:

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?

Click to expand...

I don't have TOS access but I am going to guess that it represents expiration dates.

Call Options : January is A , February is B ....December is L.

Put Options : January is M, February is N.....December is X


A second letter may represent the price bracket.

A is $5, B is 10, C is 15.....75 is O.....T is 00.........U is 7.5, V is 12.5


There are different ways of displaying an option chain...

If I remember correctly, this was the exchange where the price comes from.

as a UK trader I love ToS and Tasty Trade but do not trade the US market- for some useful insights please check out http://optionsinvesting.co.uk/before-sharesthere-were-options/