ETFs evolve: now they’re getting complex

Exchange-traded funds (ETFs) have become one of the most revealing gauges of investor sentiment and a real-time window into how markets are pricing risk. Born as simple vehicles for broad equity exposure, ETFs have since democratized access to assets once reserved for professional investors and today span everything from cryptocurrencies to private credit. In broadening access, ETFs bring liquidity and transparency - most notably in fixed income, where they give investors access to almost every corner of the market. Yet the next phase of ETF evolution, from tokenized funds to defined outcome strategies, will challenge the industry to maintain the level of transparency and liquidity that has made these funds so successful.

As a provider of indices with trillions of dollars benchmarked against them, we see key themes emerging in how ETFs are being used. If rates stay higher for longer - fed by the U.S. debt overhang and energy risks - long-duration bonds will be vulnerable to price falls, pushing investors toward shorter maturities. This has seen target maturity ETFs prove popular, where an investor can buy a 2031 ETF and ride it down the curve, collecting income and benefiting from price gains as bonds approach maturity. ETFs have also democratized bond laddering, where staggered maturities create a consistent income stream while managing duration risk - a strategy that once required significant capital and expertise.

Inflation risks have also bolstered the popularity of assets with revenues either linked to price rises, or with the pricing power to pass on higher costs - such as infrastructure ETFs, REITs, and inflation-linked bonds. Another innovation that addresses demand for higher yields in a high-rate environment are auto callable ETFs, which bring a structured product concept into the ETF wrapper. These funds provide exposure to a diversified basket of auto callable notes that pay regular coupons and return principal at maturity so long as the reference index - say the S&P 500 - stays above specific thresholds. Here, the use of structured products underscores the importance of investor education, where products can carry significant ‘tail risk’ of steep losses in market downturns. This is where the attributes of more complex strategies - think coupon barriers and observation dates - may not be intuitive to investors accustomed to the early, straightforward equity ETFs.

As ETFs reach into more sophisticated asset classes, the question of liquidity mismatch remains. In fixed income, this has been managed through various structural adaptations - growing market-maker sophistication, creation and redemption mechanisms, and the fact that bond ETFs hold a representative sample of an index rather than every security. In segments like private credit, new challenges arise, where secondary market activity is limited and valuation is inherently periodic - a dynamic that ICE is addressing by establishing a data infrastructure layer: ICE Private Credit Intelligence. Meanwhile the SEC is intensifying its scrutiny of funds holding novel, less liquid assets as it reinforces rules which limit illiquid holdings to no more than 15% of an ETF’s assets. Rather than constraining innovation, this helps preserve the liquidity which makes ETFs so valued. Maintaining confidence in the ETF proposition also depends on the quality of indices that underpin these funds. At ICE, our global indices are rules-based and transparent. Because as the assets these funds track grow harder to value, the benchmarks they’re built on will be more critical than ever.

Read more in this month's Fixed Income newsletter: https://www.ice.com/fixed-income-data-services/fixed-income/ice-fixed-income-monthly-report