Hacker News with Generative AI: Market Structure

Market Structure Primer (2019) (prooftrading.com)
The purpose of this document is to provide an overview of the US equity trading landscape. It started as an onboarding document to help new hires who aren't as well versed in market structure. It can be read start to finish in order, or you can jump around. The visual Life Cycle of an Order also provides a handy view of the various events and entities involved in the process of a trade - from conception to completion.
The Problem of HFT (haimbodek.com)
"Modern HFT wasn't a paradigm shift because its innovations brought new efficiencies into the marketplace. HFT was a paradigm shift because its innovations proved that anti-competitive barriers to entry could be erected in the market structure itself to preference one class of market participant above all others."