Market makers provide liquidity by setting fair contract prices and warehousing large portfolios of products, thereby facilitating the seamless entry and exit of trades for both retail and institutional traders.
The Probability and Brain Teasers pages are for personal reference (relearning via teaching); will update as I improve my instructional skills. Right now, it’s mostly either empty or surface level there.
Interviews and Resources for Trading
See here for a larger list of firms.