Why do Monday Expirations have lower IV than others?

[LM3886]

Those with + moneyness values (DITM) are not very liquid as you noticed with the huge B/A spread. I wrote that in python. -- plotly.express is very nice for 3D scatter plots.

I see. 3D plots are great for gaining data insights. For real-time monitoring, I like 2D plots for visualization of changes.

 

[Gilbertlycle]

I consider, that you commit an error. I suggest it to discuss. Write to me in PM, we will talk.

 

[piezoe]

They are less in demand. iv is just the way supply and demand is accounted for in option pricing. It is the one unknown in option pricing formulas.