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DATA · INDEX PRICE

Crypto Index-Price Data: Null vs Zero - Handle Missing Fields Correctly

Index price is a weighted average of spot prices from several venues. Binance documents a sentinel value for hidden constituents that must not be read as a price.

By ChartsPod Editorial Team · Reviewed by ChartsPod Research
Published · Updated · 5 min read

Short answer

Binance's constituents endpoint lists the exchanges, symbols, prices and weights behind a symbol's index. The documentation notes that prices from TradFi perp constituents are hidden and shown as -1 — a sentinel, not a negative price. Index-price klines use the 12-field format with ignored slots. When reconstructing or auditing an index, exclude sentinel values, re-normalise weights only if you understand the methodology, and compare your result with the published indexPrice rather than replacing it.

Fields and what missing values mean

FieldNull / absent meansZero / empty means
Constituent price -1Hidden: sentinel—
Constituent weight—0: excluded
indexPrice (premiumIndex)Request failed: unknown—
Index kline volume slots—Placeholder: ignore
Constituent missingCheck time and methodology—
Index Price: how to read each fieldIndex Price: how to read each field: Constituent price -1 — Hidden: sentinel; Constituent weight — 0: excluded; indexPrice (premiumIndex) — Request failed: unknown; Index kline volume slots — Placeholder: ignore; Constituent missing — Check time and methodology.Constituent price -1Hidden: sentinelConstituent weight0: excludedindexPrice (premiumIndex)Request failed: unknownIndex kline volume slotsPlaceholder: ignoreConstituent missingCheck time and methodology
Index Price: missing vs zero, field by field. Original ChartsPod editorial graphic.

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Handling policy

Policy for this sourcePolicy for this source: Treat -1 as sentinel; Never average sentinels; Compare with published index; Keep constituent timestamps; Ignore placeholder slots.POLICY FOR THIS SOURCETreat -1 as sentinelNever average sentinelsCompare with published indexKeep constituent timestampsIgnore placeholder slots
Apply this policy to every index price request. Original ChartsPod editorial graphic.

Illustrative: a reconstructed index averages a -1 sentinel with five real prices and comes out roughly 17% low. The published index was fine; the audit was wrong.

Conclusion

Related: Crypto Mark-Price Data: Null vs Zero - Handle Missing Fields Correctly, Binance Funding History: Null vs Zero - Handle Missing Fields Correctly.

When reconstructing or auditing an index, exclude sentinel values, re-normalise weights only if you understand the methodology, and compare your result with the published indexPrice rather than replacing it.

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Questions readers ask

Why does a constituent show -1?

Binance hides some TradFi perp constituent prices with -1.

Is index price the same as mark price?

No; mark price is derived using the index and premium.

Can I rebuild the index?

Approximately; compare with the published value.

Sources and methodology

Field definitions come from DEX Screener's API reference, CoinGecko's onchain API documentation and Binance's Spot API documentation, read 17 October 2026. Where a schema was not visible in the documentation, this guide says so and describes defensive handling rather than asserting field behaviour.

  1. Binance: USD-M Futures market data API — trades, depth, funding and open interest.

This article explains research tools and workflows. It is not financial advice, does not recommend buying or selling any asset and does not predict prices. Crypto derivatives carry a risk of rapid and total loss of margin.

CHARTSPOD EDITORIAL EDITION · RESEARCH AND EDUCATION ONLY · NOT FINANCIAL ADVICE.