How to Become a Registered Market Maker
How to become a market maker: exchange registration, two sided quoting size and width rules, net capital under Rule 15c3-1, and what suspension means.
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Who Are the Biggest Market Makers?
Who are the biggest market makers? The firms that quote US stocks and options, and how to read your own broker's Rule 606 report to see who fills your orders.
How Do Market Makers Make Money? The Spread
What market makers do and how they earn the bid-ask spread, with real tick data: measured spreads, quote updates per second, and the SQL behind every number.