Rare Index™Platform Access →

Glossary: RARE INDEX™

Term definitions and market concepts used across the Rare Index platform.

On This Page

01Market Structure02Performance & Signals03Risk & Stability04Pricing & Charts05Rare Index™ Scoring06Collectibles Market Terms

Market Structure

Rotating Leadership

Leadership is shifting between categories rather than concentrated in one. No single category is consistently outperforming, indicating a transitional market environment.

Broad Participation (Breadth)

Measures how many categories are contributing to market gains. Broad participation indicates a healthy market where multiple segments are advancing together.

Narrow Leadership

A small number of categories are driving most of the gains. This often signals concentration risk and potential instability if leaders weaken.

Market Regime

The overall structure of the market at a given time (e.g., trending, rotating, fragmented). Used to understand how capital is flowing across assets.

Performance & Signals

RI Signal

Rare Index's composite indicator of asset strength, combining price movement, sales activity, and market positioning. Used to quickly assess whether an asset is strengthening or weakening.

Momentum

Measures the rate of price change over a defined period (e.g., 7D, 30D). Strong momentum indicates sustained buying interest.

Top Mover

The asset or category with the strongest performance over a selected timeframe.

Leader / Laggard

Leader: Top-performing category or asset. Laggard: Weakest-performing category or asset. Used to quickly identify relative strength.

Risk & Stability

Volatility

Measures how much an asset's price fluctuates over time. Higher volatility indicates greater uncertainty and price instability.

Drawdown

The decline from a peak price to a subsequent low. Used to measure downside risk and potential loss.

Correlation

Measures how closely an asset moves relative to another (e.g., S&P 500, gold). Low or negative correlation can indicate diversification benefits.

Sales Activity (Liquidity)

Indicates how easily an asset can be bought or sold without impacting price. Higher sales activity suggests more consistent transaction activity and tighter pricing.

Pricing & Charts

Normalized Performance (Base = 100)

A method of comparing performance across assets by starting all values at the same baseline. Allows direct comparison regardless of starting price.

Spread vs Benchmark

The performance difference between an asset and a selected benchmark (e.g., NASDAQ). Used to evaluate relative outperformance or underperformance.

Price Observation

A recorded data point representing an asset's value at a specific time. Used to build historical price series and trend analysis.

Transaction Price

The actual sale price recorded from an auction or marketplace. Represents a confirmed market transaction, not an estimate.

Rare Index™ Scoring

Confidence Score

Indicates the reliability of pricing data based on volume, consistency, and comparables. Higher confidence suggests stronger data quality.

Sales Activity Score

Measures transaction frequency and market depth for an asset. Higher scores indicate more active and tradable markets.

RI Rating (Signal Strength)

A summarized strength indicator (e.g., Weak, Moderate, Strong) derived from underlying signals. Designed for quick interpretation of market positioning.

Collectibles Market Terms

Understanding how collectibles are valued, traded, and authenticated.

Comp (Comparable Sale)

A previous sale of a similar asset used to estimate current value. Equivalent to comps in real estate or precedent transactions in finance.

Last Sale

The most recent recorded transaction price for an asset. Often used as a reference point but may not reflect current market conditions.

Fair Market Value (FMV)

The price an asset would reasonably sell for between informed buyers and sellers. Derived from multiple comps, not a single transaction.

Auction Result

A verified public sale, typically from houses like Sotheby's or Christie's. Represents high-confidence pricing data.

Hammer Price vs Total Price

Hammer Price: Final bid price at auction. Total Price: Hammer price plus buyer's premium. Important distinction for accurate valuation.

Buyer's Premium

Additional fee paid by the buyer at auction (typically 10–25%). Included in total transaction cost.

Provenance

The ownership history of an asset. Strong provenance can materially increase value.

Condition / Grade

Assessment of an asset's physical state. In cards: PSA/BGS grading scale. In watches: condition tiers (mint, excellent, etc.). Condition is often the single biggest driver of price dispersion.

Population (Pop Report)

Number of known graded examples of an asset at each condition level. Used to measure rarity and supply.

Rarity vs Scarcity

Rarity: True limited supply. Scarcity: Temporarily low availability. Critical distinction for long-term value assessment.

Bid-Ask Spread

Difference between what buyers are willing to pay and sellers are asking. Wide spreads indicate illiquid markets.

Market Depth

Number of active buyers and sellers at different price levels. Deeper markets produce more stable pricing.

Company

AboutInstitutionsNewsletterContact

Resources

DocumentationMethodologyData SourcesGlossaryAPISecurityRI Certified

Legal

LegalTerms of ServicePrivacy PolicyCookie PolicyDisclaimer

© 2026 Rare Index LLC. All rights reserved.