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Stefan's blog

Follow the blogs of our expert Stefan Schlamp, Head of Quantitative Analytics, about recent trends and developments in the market.

63 results
  1. Stefan's blog: Battle for Pole - Episode 3

    Apr 7, 2025

    The truce that had lasted for 2-years has been broken. It started in April when the leader - without clear need - reduced his latency and extended ... More

  2. Stefan's blog: Shortwave Data Will Go the Way of the Dodo

    Apr 3, 2025

    Just like the first Chicago to New York microwave links came online just months after the Spread Network fiber connecting the two trading hubs ... More

  3. Stefan's blog: Birthday Problem - Nanosecond Edition

    Mar 24, 2025

    The classical birthday problem asks for the probability of two children in a class of x children having their birthdays on the same day. Given ... More

  4. Stefan's blog: Bullets Dodged, Bullets Caught

    Mar 17, 2025

    Suppose you have a resting order in the limit order book. Your fair value model suggests that you should pull the order. But the decision of ... More

  5. Stefan's blog: Closing Auction Market Share - The Long View

    Mar 10, 2025

    There have been some recent studies that highlighted the increasing market share of the closing auction. The data in these studies "only" went ... More

  6. Stefan's blog: Are Fill/Cancels to Blame?

    Mar 10, 2025

    This week I add another bucket: fill/cancels a/k/a late cancels. These are undesired fills - the participant had tried to cancel the order but by ... More

  7. Stefan's blog: Share Buyback Regs vs. Physics

    Feb 17, 2025

    The regulations for executing share buybacks are oddly specific. More

  8. Stefan's blog: Where'd Your Money Go?

    Feb 17, 2025

    Under ideal conditions, the market maker earns the half-spread on every trade. Alas, reality is anything but ideal. More

  9. Stefan's blog: Retail, Dark Midpoint, and CLOB Intraday Volume Profile

    Feb 3, 2025

    Xetra dark midpoint allows us to examine difference in intraday trading patterns. More

  10. Stefan's blog: Variability of Auction Liquidity

    Jan 27, 2025

    Stefan checks the variability of deep liquidity in the auction book. More

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