Event-Market Open Interest As Macro Gauge
Tracks whether open interest on regulated event exchanges, rather than volume, is a usable read on how concentrated the macro bet has become, since holding into a dated event and churning a market produce opposite signatures.
September 12 update: the candidate opens on a divergence inside one exchange's own monthly data rather than on an odds level. August cash trading on the largest regulated event exchange fell 7.1%, ending twelve consecutive monthly increases, while open positions grew 18.8% over the same month, falling turnover with rising open interest is the signature of participants holding a view into a dated event rather than traders recycling risk. The concentration is what makes it macro rather than venue trivia: open interest in economics contracts rose 129.2% and Fed-decision contracts supplied 88% of that increase, landing directly on the September 16 meeting the rates row is built around. No standing row holds this, because the prediction-market board scores odds moves against news and traded prices and says nothing about position accumulation. What is unproven is durability: this may simply be event plumbing around one unusually contested meeting. Next check: whether open interest stays elevated after the September meeting rather than collapsing back, which is what separates a standing gauge from a one-event artifact.
What would move it
▲ Raise
- Open interest holds or keeps rising after the September 16 decision rather than collapsing back.
- The same volume-down, open-interest-up pattern repeats around a second dated macro event such as a CPI release or a Bank of Japan decision.
- Open-interest extremes precede moves in traded rates or FX markets rather than following them.
- Exchange or regulator data separates directional holding from market-making inventory.
▼ Lower
- Open interest drains immediately after the September meeting, marking it as event plumbing.
- The increase traces to a small number of accounts, incentive programmes, or market-maker positioning rather than to broad holding.
- Contract resolution rules or liquidity prove too thin for the open-interest number to mean what the headline implies.
Conviction over time
Event timeline
- candidate September 12, 2026
Curated map conviction changed from unrated to Low, new candidate; turnover fell 7.1% while open positions grew 18.8%, with economics open interest up 129.2% and Fed-decision contracts supplying 88% of it. September 12 update: the candidate opens on a divergence inside one exchange's own monthly data rather than on an odds level. August cash trading on the largest regulated event exchange fell 7.1%, ending twelve consecutive monthly increases, while open positions grew 18.8% over the same month, falling turnover with rising open interest is the signature of participants holding a view into a dated event rather than traders recycling risk. The concentration is what makes it macro rather than venue trivia: open interest in economics contracts rose 129.2% and Fed-decision contracts supplied 88% of that increase, landing directly on the September 16 meeting the rates row is built around. No standing row holds this, because the prediction-market board scores odds moves against news and traded prices and says nothing about position accumulation. What is unproven is durability: this may simply be event plumbing around one unusually contested meeting. Next check: whether open interest stays elevated after the September meeting rather than collapsing back, which is what separates a standing gauge from a one-event artifact.
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|---|---|---|
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