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Open interest, volume and buildup classification
Updated 4 August 2026 · 4 min read · 16 Contents
Plain-language meaning
Open interest, volume and buildup classification means examining futures whose underlying, expiry, price unit, multiplier, margin and settlement determine the evidence with the identity, period, unit, source and limitations kept visible. It is a disciplined way to describe evidence, not a shortcut to an investment conclusion.
Learning objectives #
After this chapter you should be able to define open interest, volume and buildup classification, identify the evidence needed to use it, distinguish a reported zero from unavailable evidence, and explain why unlike instruments or periods may not be comparable.
Prerequisites #
Read “Contango, backwardation and curve shape” first. Be comfortable checking an exact listing or instrument, its source, observation date, native currency and unit. When any one of those is unknown, pause the comparison and record the gap.
Core concept #
Volume counts activity; open interest counts outstanding contracts; buildup combines price and OI changes. Preserve raw facts separately from interpretation, and retain the denominator, time window, classification rule and provenance that make the evidence reproducible.
Method #
For open interest, volume and buildup classification, first identify the exact evidence named in this chapter: Volume counts activity; open interest counts outstanding contracts; buildup combines price and OI changes. Then freeze identity and period, collect source-backed inputs with units, calculate or classify only compatible evidence, and record contrary facts and unavailable fields.
Where it appears in XMarketRadar #
Use the persisted Futures workspace; always read source/as-of status, exact contract key and synchronized spot basis. A displayed field is useful only with its source and as-of context. If XMarketRadar does not calculate this chapter’s concept directly, use the chapter as an educational checklist and retain the supporting primary document or screen URL in the research workspace.
Worked example #
Price +3% and OI +8% maps to the disclosed long-buildup quadrant, not proof of buyer identity. Module context: Illustrative XYZ 28-Aug-2026 future is 102 CU with multiplier 50 against synchronized spot 100 CU, so the displayed basis is +2 CU and one-point contract movement is CU 50. This is an illustrative audit trail, not live data, a target or an expected outcome.
Interpretation #
Interpret the result in the direction defined by the field, not by an assumed desirable outcome. Higher, lower, positive and negative can each have different meanings by context. Compare the observation with its own history or a compatible benchmark, and label conclusions as observations, interpretations or user decisions.
Limitations and common mistakes #
Adding OI across incompatible expiries or multipliers. Leverage, stale spot, roll discontinuity, changing margin and settlement rules can make a compact futures metric incomplete. A precise calculation can still mislead when the source is stale, the denominator changed, or a classification hides important detail.
Market and jurisdiction differences #
Contract multipliers, expiries, settlement, margin, position limits and price bands vary by exchange and jurisdiction. Exchange rules, accounting conventions, calendars, taxes, disclosure timing, quote scale and licensed coverage can differ. Verify the current primary source for the relevant venue; registry support alone does not prove that every field is available.
Key takeaways #
For open interest, volume and buildup classification, remember this boundary: Adding OI across incompatible expiries or multipliers. Keep the evidence exact, dated and source-backed; publish missing information as unavailable rather than manufacturing a value.
Practice #
Reproduce this historical scenario from source-labelled inputs: Price +3% and OI +8% maps to the disclosed long-buildup quadrant, not proof of buyer identity. Then change one input, preserve the original period and unit, and explain whether the result changes or becomes unavailable. Write the identity, source, date, unit and failure condition, then state exactly what would display as —.
Knowledge check #
Reveal answer and explanation
Question: which mistake would invalidate a review of open interest, volume and buildup classification? Answer: Adding OI across incompatible expiries or multipliers. Explanation: the chapter requires the stated identity, period, unit and compatible evidence; a missing required input remains — rather than 0.
Educational use only #
This chapter is descriptive education, not investment advice, a forecast, a recommendation, a suitability assessment or an instruction to buy, sell, rebalance, trade or place an order. XMarketRadar’s broker connections remain read-only.