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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.

140 results
  1. Stefan's blog: A Preregistration

    Oct 26, 2026

    The European Consolidated Tape is live! So I am a bit late, but I would like to pre-register a study to measure one aspect of the impact of the tape. More

  2. Stefan's blog: Market Impact or Predestination

    Oct 22, 2026

    Measuring market impact only based on public market data seems straight-forward: Calculate the average price move following a trade as a function ... More

  3. Stefan's blog: A Single Auction vs. 24/7 Trading

    Oct 12, 2026

    There appears to be a wide-spread demand for longer trading hours - preferably 24/7 trading as is the case in crypto. "Appears" here is the key word. More

  4. Stefan's blog: Going Full Kelly - 2026Q3

    Oct 5, 2026

    Never go full Kelly! If you do, it will show up in the quarterly summary of largest and deepest trades. As a reminder, here are links to the ... More

  5. Stefan's blog: Timing The Market When You Run The Market

    Sep 29, 2026

    ... and getting it right! 15 January 2015 was another interesting day in the markets. The Swiss National Bank (SNB) had maintained a 1.20 CHF/EUR ... More

  6. Stefan's blog: The Cheddar-Mozzarella Spread

    Sep 21, 2026

    The European Energy Exchange (EEX) publishes Weekly European Cheese Indices (WECI). Not knowing anything about this niche of the market, I would ... More

  7. Stefan's blog: Level-3 Alpha

    Sep 15, 2026

    A few weeks ago, I showed how much predictive power the book pressure has. For that analysis I had used the "classical" formula, which uses the ... More

  8. Stefan's blog: Market Share by Vintage

    Sep 7, 2026

    Suppose you create a new chocolate bar today. What are the chances that nobody comes up with a better recipe over the next 50 years? And yet, the ... More

  9. Stefan's blog: Goldilocks Queue Position

    Sep 7, 2026

    It has been over four years since my first attempt to show the importance of queue position for market making. I have also written about how to ... More

  10. Stefan's blog: Kleine Ursache, Große Wirkung

    Sep 1, 2026

    or: The Butterfly Effect. Orders in Xetra's midpoint can have a minimum acceptable quantity (MAQ). The intention is to protect orders from being ... More

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