What a Crypto Index Fund Actually Holds

An index fund is defined by its rules. In crypto those rules differ enough between products that two funds described the same way can hold very different things.

The construction choices

Weighting method. Market capitalisation weighting is standard and produces heavy concentration, since the two largest assets account for most of the sector’s value. Equal weighting spreads exposure and increases turnover. Capped weighting limits any single asset, which is how most products avoid being eighty percent one holding.

Eligibility rules. Minimum market capitalisation, minimum liquidity, minimum listing history, and exclusions for assets with unresolved legal classification. These rules determine what can enter.

Rebalancing frequency. Monthly and quarterly are both used. More frequent rebalancing tracks the intended weights more closely and costs more in trading.

Treatment of staking. Whether the fund stakes eligible assets and, if so, who receives the rewards. This can be a meaningful return difference and it is frequently buried in the documentation.

Why the concentration problem is hard

The sector’s value is dominated by a small number of assets. A pure market-cap index is therefore not diversified in any useful sense.

Capping solves that arithmetically and introduces a different problem: a capped index sells the best performer continuously to stay within the cap, which is a systematic drag during a period when one asset outperforms.

There is no construction that avoids both. Choosing a product means choosing which problem you prefer.

The costs that are not the management fee

Rebalancing turnover. Every rebalance is trading, and trading in less liquid assets costs more than the headline spread suggests.

Tracking difference. The gap between the index return and the fund return, which includes fees, trading costs and cash drag. This is the number that matters and it is reported separately from the fee.

Tax treatment. Varies enormously by jurisdiction and by wrapper. For some investors this dominates every other cost.

What to check before buying one

1. The current holdings and weights, published daily by most products
2. The cap, if any, and how often it binds
3. Rebalancing frequency and the published turnover
4. Whether staking rewards accrue to holders
5. Tracking difference over the last twelve months, not the stated fee

The alternative worth considering

For an investor whose intended exposure is largely the two largest assets, an index product’s diversification is mostly notional and its costs are real.

Holding the two directly, through a venue that handles institutional crypto allocations and self-custody, achieves similar exposure without the fee or the rebalancing drag, at the cost of doing the custody yourself.

That trade is the actual decision. The choice between index products is secondary to it.