[Protagoras]

You can't seriously think that a market maker took down a 20 million share trade for his own account.

You have a fundamentally flawed understanding of the business. And I don't mean that as an insult.

[blueberry12]

Every book I read mentioned market makers as people with deep pockets. So, all I know is market makers do have large accounts. I do not know what is large or small, but I don't think they were referring to personal accounts. I think market makers are trading with their company's money. Am I wrong here?