What Are Custom Basket ETFs?

What Are Custom Basket ETFs?

3 Min.

Custom basket exchange-traded funds (ETFs) are a type of investment fund that offers managers more flexibility in buying and selling assets. These funds allow managers to customize their asset purchases outside of their target index or allocation constraints, provided it is in the best interest of shareholders. Effective use of custom basket ETFs can benefit investors, but ineffective customization may result in costs rather than rewards for shareholders.


In 2019, the U.S. Securities and Exchange Commission (SEC) introduced a transformative rule, empowering investment managers to tailor asset acquisitions beyond the confines of their target indices or allocations. This rule laid the foundation for custom basket exchange-traded funds, offering a strategic avenue for optimizing shareholder returns.

This regulatory shift grants ETF managers enhanced flexibility in the dynamic landscape of buying and selling stocks and other assets. Unlike the previous norm, where funds were bound to transact asset baskets strictly in line with fund requirements, the custom basket rule allows a departure from these constraints when it aligns with the ETF's best interests and those of its shareholders. The previous practice of executing transactions at suboptimal market prices has been abandoned. Custom basket ETFs leverage this newfound flexibility to tailor their buying and selling strategies, ultimately prioritizing the maximization of shareholder profits.

Navigating Custom Basket ETF Dynamics

Exploring the dynamics of custom basket ETFs involves delving into a scenario: when shares of an index fund ETF change hands, it's not just a simple transfer; there's a complex interplay involving the issuance or elimination of shares by the fund. Simultaneously, the fund must navigate the buying or selling of underlying assets to maintain the accurate weighting of the index.

Preceding the 2019 ETF Rule, the conventional method involved automated basket trades for stock transactions, where the fund executed larger orders, acquiring a basket of shares during issuances and selling a basket during redemptions. While functional, this approach lacked consideration for market shifts and tax implications. The advent of custom baskets empowers fund managers with discretion in share transactions and timing, even if it means deviating slightly from the underlying index or target allocation. This latitude is granted if the custom basket aligns with the fund's best interests and those of its shareholders.

Impact of Managerial Strategies on ETF Performance

The efficacy of a fund manager's custom basket strategy can significantly influence the performance of an ETF index fund. When evaluating multiple S&P 500 funds, variations in outcomes may arise due to the distinct approaches employed by fund managers.

Pros and Cons of Custom Basket ETFs

Strategically harnessed, custom basket ETFs offer advantages for both fund managers and investors. A refined trading strategy can enhance tax efficiency, reduce trading costs, and enable the fund to capitalize on favorable buying or selling opportunities.

However, this flexibility comes with a trade-off, as it may lead to deviations from the precise alignment with the index or allocation model. Ineffectively implemented custom baskets may result in costs for shareholders rather than delivering rewards.


The 2019 SEC rule revolutionized investment management, introducing custom basket ETFs that provide flexibility for fund managers. This departure from traditional automated basket trades allows for optimized strategies, enhancing tax efficiency and reducing trading costs. While custom basket ETFs offer potential shareholder rewards, effective implementation is crucial to avoid costs. Striking a delicate balance between customization and adherence to indices is key, emphasizing the need for strategic decision-making to maximize shareholder profits in this evolving investment landscape.

Exchange-Traded Funds (ETFs)
Custom Basket ETFs
Follow us
Hexn operates under HEXN (CZ) s.r.o. and HEXN Markets LLC. HEXN (CZ) s.r.o. is incorporated in the Czech Republic with the company number 19300662, registered office at Cimburkova 916/8, Žižkov, Praha. HEXN (CZ) s.r.o. is registered as a virtual assets service provider (VASP). HEXN Markets LLC is incorporated in St. Vincent and Grenadines with the company number 2212 LLC 2022, registered office at Beachmont Business Centre, 379, Kingstown, Saint Vincent and the Grenadines