September 07, 2026
There's a pattern sitting on the US Open board this week that I find more interesting than any single line: in three separate matches, the market has priced the less famous name as the favourite. That's not a scandal — seeds and reputations lag form all the time — but it does give us a clean set of books to look at side by side, and a useful lesson in how depth and turnover shape what a price can actually do.
Here's the September 7 snapshot I'm working from, and how I read it.
Karen Khachanov vs Learner Tien prices Tien at 63.5% and Khachanov at 36.5%. That's a fairly emphatic gap for a matchup between a long-tenured top-20 fixture and a younger left-hander still building his hard-court résumé. Two-thirds implied win probability isn't a coin flip with a lean; it's a stated view.
The number that caught my attention isn't the price, though — it's the shape of the book. Liquidity sits at roughly $1.01M against $331k of 24-hour volume. That's a turnover-to-depth ratio of about 0.33: for every dollar of resting depth, only about 33 cents has changed hands. Books built like that tend to absorb order flow rather than move on it. A single large tic
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