Broad-Market Altcoins Index

Coverage is the objective

A broad-market index should cover a meaningful share of the eligible altcoin market while excluding assets whose prices, supply, liquidity, or identity cannot support the benchmark. It is not a claim that every included asset is suitable for every investor.

Candidate-universe decisions

• Exclude bitcoin by definition.
• Classify stablecoins separately from risky assets.
• Consolidate wrapped representations with canonical assets.
• Set policies for privacy assets, exchange tokens, memecoins, liquid-staking tokens, and tokenized claims.
• Use durable identifiers and contract-address history.

Fixed count versus coverage target

A fixed-count index is easy to explain but may force weak additions when the eligible market narrows. A coverage target adapts the number of constituents to market structure but makes the count variable. A tiered design can require a minimum and maximum count while targeting a share of eligible free-float market capitalization.

Use buffers around cutoffs

Entry and exit bands reduce turnover when assets sit near the threshold. Hard failures—such as a prolonged inability to price or loss of eligibility—should override buffers.

Weighting choices

Market-cap weighting represents aggregate value but can concentrate in large networks. Equal weighting emphasizes breadth but increases small-asset exposure and turnover. Capped or square-root methods can compromise. Liquidity caps help align theoretical weights with implementation capacity.

Companion indices improve interpretation

A useful family can publish a headline cap-weighted benchmark, an equal-weight breadth series, an ex-stablecoin series, and sector or ecosystem sub-indices. Differences between them show whether market performance is broad or concentrated.