- 21Shares and A&G launch the 21Shares Flexible Crypto Index ETP (FLEX), giving diversified access to major digital assets through a single listed product.
- The ETP tracks the 21Shares Flexible Crypto Index, built with MarketVector from an institutional-grade universe filtered by size, liquidity and regulatory criteria.
- A&G’s quantitative model combines low-volatility portfolio construction, momentum signals and a dynamic allocation to liquidity of up to 30% in USDC.
- Bitcoin leads the current composition, alongside USDC, Ethereum and other assets, aiming to balance growth potential and risk management for European investors.
The partnership between 21Shares and A&G has given rise to a new exchange-traded product that seeks to bring a more structured approach to cryptocurrency investing in Europe. Under the name 21Shares Flexible Crypto Index ETP (FLEX), the vehicle aims to offer diversified exposure to leading digital assets while incorporating an explicit risk-control framework.
Rather than simply tracking a single cryptocurrency, FLEX packs a curated basket of cryptoassets into one tradable security. The idea is to make it easier for investors to enter the digital asset space with a tool that blends diversification, clear rules and built-in flexibility to navigate the sharp swings that often characterize crypto markets.
What is the 21Shares Flexible Crypto Index ETP (FLEX)?
FLEX is an exchange-traded product focused on cryptocurrencies that seeks to mirror the performance of the 21Shares Flexible Crypto Index. This index has been developed by 21Shares together with MarketVector Indexes, a global provider known for building benchmarks in the digital assets segment. The goal is to concentrate in a single instrument a group of cryptoassets that meet institutional quality thresholds, while excluding those with thinner liquidity or less defined regulatory footing.
The index starts from a broad universe of coins and tokens, but only includes assets that pass a strict set of filters based on market capitalization, trading volume and regulatory standards. By doing so, the basket is designed to remain investable for professional investors and sophisticated retail participants, and to respond better to the compliance demands that are becoming more stringent across European jurisdictions.
For investors, the practical outcome is straightforward: through FLEX, they can gain access to several leading cryptocurrencies at once without having to open multiple exchange accounts, manage wallets or handle private keys. Exposure is obtained via one listed security, which can be bought and sold like any other ETP and slotted into equity or mixed-asset portfolios more easily than direct holdings in individual tokens.
The product is issued by 21Shares AG, based in Switzerland, and uses physical replication of the underlying assets. It is identified by the ISIN CH1468906669 and carries an annual management fee of 1.49%, a level that is broadly in line with other diversified crypto ETPs available in the European market.
How the index is built and the role played by A&G
At the heart of FLEX lies a quantitative allocation model designed by A&G. The Spanish firm brings to the table its experience in systematic investing and risk management in highly volatile markets. The framework rests on two main pillars: a portfolio construction process aimed at reducing the overall volatility of the basket, and the use of trend or momentum indicators to decide how to distribute exposure among different cryptocurrencies and cash-like holdings.
Instead of simply weighting components by market cap, the methodology seeks to maintain a low correlation between the assets that make up the index. This leads to a distribution that looks not only at the size of each cryptoasset but also at how its price behavior interacts with that of its peers. In a market as turbulent as crypto, that internal diversification is designed to dampen some of the most extreme moves at the aggregate level.
A&G’s approach incorporates momentum signals to pinpoint those assets showing a more persistent positive trend, while scaling back exposure to cryptocurrencies that enter prolonged correction phases. The process is rule-based, transparent and repeatable, aligning more closely with institutional practices than with the short-term, speculative trading that is still common in retail crypto activity.
This ETP also builds on A&G’s previous experience in the digital asset arena. In 2023, the firm launched what it described as the first Spanish-law fund dedicated to cryptocurrencies, known as Criptomonedas FIL. FLEX can be seen as a logical extension of that journey, but now channeled through a listed product format that potentially broadens its reach among investors who are more familiar with exchange-traded instruments.
Risk management and tactical use of liquidity
One of the features that clearly sets FLEX apart from many other crypto vehicles in Europe is its integrated risk management framework. The index is structured so that up to 30% of the portfolio can be shifted into liquidity, specifically via USDC, a stablecoin pegged to the US dollar. This liquidity allocation is not static; it acts as a tactical lever that changes in response to market conditions and model signals.
In periods of heightened stress or sharp spikes in volatility, the model can raise the share of USDC to as much as 30% of the total basket. In practice, this allows a meaningful portion of the exposure to move into a more stable asset, cutting the sensitivity of the overall ETP to sudden drops in Bitcoin, Ethereum or other cryptocurrencies included in the index.
When the trend indicators suggest that the environment is turning more constructive, the allocation gradually rotates back into the cryptoassets with the strongest relative performance, reducing the weight in cash-like positions. The intent is to capture market upswings while preserving a buffer during tougher phases, a balance that many investors look for when they want to participate in the sector without fully embracing its most aggressive risk profile.
A&G emphasizes that the “core of FLEX is its allocation model”, which combines risk-optimized portfolio construction, momentum signals and a dynamic liquidity component. Wrapped into a single listed product, this combination aims to mimic how professional managers handle risk in volatile environments, but in a standard ETP format that can be accessed through the stock exchange.
Current composition: weight of Bitcoin, USDC and other cryptoassets
Looking at the current snapshot of the index, Bitcoin holds the largest weight, accounting for roughly 51.12% of the portfolio. Given its role as the first and largest cryptocurrency by market value, its prominence within FLEX is hardly surprising. That allocation is paired with a significant holding in USDC, which represents about 28.72% of the basket.
This sizeable liquidity position illustrates the product’s relatively cautious stance, since close to one-third of the exposure can sit in a stable asset when conditions call for it. Alongside Bitcoin and USDC, other established names in the crypto ecosystem appear in the mix, such as Ethereum with around 10.25% of the portfolio, and XRP, which stands at approximately 3.38%. The remaining share is distributed among additional assets that satisfy the eligibility criteria.
The resulting blend of large-cap cryptocurrencies and a meaningful liquidity cushion means that the ETP is likely to behave differently from a simple single-asset fund tied exclusively to Bitcoin or Ethereum. The USDC component acts as a partial shock absorber during market downturns, while the inclusion of several tokens seeks to tap into different sources of return across the digital asset landscape.
The composition is not fixed over time. The index is subject to periodic rebalancing according to its rulebook, which means that each asset’s weight can shift as markets move and as the low-volatility and momentum filters applied by A&G generate new signals. That dynamic structure is intended to keep the basket aligned with the underlying methodology as conditions evolve.
European backdrop and investor interest
The arrival of FLEX takes place in a context where regulated crypto investment products have been steadily gaining ground in Europe. Over recent years, the industry has moved away from more informal arrangements or purely tech-oriented solutions toward listed vehicles with clearer governance, audited structures and custody setups closer to institutional expectations.
Companies like 21Shares have positioned themselves as key players in this space by building infrastructure for ETPs focused on digital assets. With FLEX, 21Shares adds another piece to its lineup in the area of “smart” indices with an explicit risk layer, targeting investors who want exposure to cryptocurrencies but also value transparency, oversight and mechanisms to moderate volatility.
From a Spanish market perspective, A&G’s involvement in designing and implementing the quantitative index model provides an additional element of familiarity for local investors. The firm had already signaled in specialized forums that it expected more growth in ETPs built around diversified crypto baskets that are open to retail clients than in traditional mutual funds devoted solely to digital assets.
Both 21Shares and A&G stress that, despite these safeguards, investing in cryptocurrencies still entails significant risks and high volatility, and that these products are not suitable for all profiles. They also reiterate the standard reminder that past performance is not a reliable guide to future results, and that crypto ETPs should be considered within a broader, diversified investment strategy rather than as standalone bets.
With this joint initiative, the two firms are trying to provide European investors with a way to approach the crypto space through a structured, rules-based product that uses liquidity as a defensive tool when markets are under pressure, while still leaving room to participate in the potential upside of leading digital assets when conditions improve.
