Replies to post #111 on S&P 500 Index (SP500)

[JLS]

The MM (Market Makers) are doing ths type of trade. IMHO.

I'm not convinced of that. They have at their fingertips the entire order lineup. You don't use Level2 so you don't see what's going on in the background. MMs also pocket the spread, so they don't have to be particularly sly.