Funding is the cleanest real-time gauge of perp positioning — but only if you measure it right. A naive average across venues can flash extreme when actual capital is barely leaning. OI-weighting fixes that, and the gap between the two is itself information.

The problem with a plain average

Raw funding usually means the simple average of funding rates across venues. The flaw: it treats a thin venue and a deep venue as equals.

If a small exchange with negligible open interest prints +0.10% while the major venues holding the real OI sit near +0.01%, a plain average drags the headline number up. You see "stretched positive funding" and brace for a long squeeze that never comes — because the capital that would get squeezed isn't actually positioned that way.

What OI-weighting fixes

OI-weighted funding weights each venue's rate by its share of open interest. Venues where the actual positioning lives dominate the number; thin venues stop distorting it.

The result tracks where the leveraged capital genuinely sits. When OI-weighted funding is stretched, the crowded positioning is real and cascade risk is real. When raw is hot but OI-weighted is calm, the heat is concentrated on venues too small to matter — usually noise, occasionally an early tell on a specific desk.

Trading the divergence

The spread between the two carries signal:

  1. Both elevated — broad-based crowding. Highest-conviction squeeze setup; the leverage is everywhere.
  2. Raw hot, OI-weighted flat — fragmented, venue-specific positioning. Fade the headline; the squeeze fuel isn't where the average implies.
  3. OI-weighted hot, raw flat — crowding concentrated on the deepest venues. Underrated risk, because the simple average is masking it.

Takeaway

Raw funding answers "what's the average rate," OI-weighted funding answers "where is the money actually leaning" — and the second is the question that matters for squeeze and cascade risk. Default to OI-weighted, and read the spread against raw as a map of whether crowding is broad, fragmented, or concentrated. Always pair it with OI itself: stretched funding on falling OI is positions closing, not new risk building.