The battle between exchange-traded funds (ETFs) and traditional mutual funds long ago ceased to be a competition over performance. Today, the real battleground is costs, and on that field, ETFs are expanding an advantage that is beginning to redefine the global asset management business.
Figures show that competitive pressure has pushed expense ratios for numerous ETFs to historic lows, to the point where some products charge merely between 0.02% and 0.03% annually. There are even ETFs with a 0% management fee, used by some managers as a tool to attract new clients toward other higher-margin services.
The consequence is visible in investment flows. While ETFs continue to capture the vast majority of new money entering the industry, mutual funds continue to lose ground, especially among institutional investors, financial advisors, and new generations of savers who consider cost to be one of the primary determinants of long-term performance.
A Difference of a Few Basis Points That Moves Trillions
Fee reductions may seem marginal to an individual investor, but when managing a portfolio over decades, a few tenths of a percentage point represent thousands of dollars in additional wealth.
Precisely for this reason, the industry is experiencing a true price war. According to Morningstar, the asset-weighted average cost of U.S. investment funds continues to decline and sits at historically low levels, driven primarily by the growth of passive vehicles and low-cost ETFs.
For example, the market’s largest index ETFs currently charge remarkably low fees:
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Vanguard S&P 500 ETF (VOO): 0.03%
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iShares Core S&P 500 ETF (IVV): 0.03%
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SPDR Portfolio S&P 500 ETF (SPLG): 0.02%
Even certain ETFs specialized in fixed income or international markets have significantly reduced their fees over the past five years to compete for asset volume. In contrast, the average cost of many active mutual funds continues to range between 0.50% and over 1.00% annually, depending on the strategy and market, although competitive pressure has also forced numerous managers to lower their rates.
Investment flows clearly reflect where investor preference is shifting. According to ETFGI, the global ETF industry already manages more than $17 trillion in assets, setting new historic highs during 2026.
In the United States, the world’s largest market, assets exceed $15.7 trillion, while net inflows continue to break records. In contrast, although the mutual fund industry remains considerably larger in managed assets, much of its recent growth stems from market appreciation rather than new capital inflows. Investors are prioritizing cheaper, more liquid, and more tax-efficient vehicles.
Major Managers Can Charge Less… Because They Manage So Much More
Paradoxically, the price war is strengthening the world’s largest managers. Firms such as BlackRock, Vanguard, and State Street have managed to convert massive growth in assets under management into economies of scale that allow them to keep lowering fees without sacrificing corporate profitability.
BlackRock currently manages around $13 trillion, Vanguard exceeds $11 trillion, while State Street Global Advisors hovers around $5 trillion. Combined, these three giants manage nearly $29 trillion, an unprecedented concentration in the history of asset management.
This massive scale makes it possible to operate products with extremely low fees while continuing to generate growing revenues thanks to the overall volume managed.
Active Funds Respond with New Strategies
As a consequence of this war and the pressure on fees, traditional managers are being forced to modify their value proposition. More and more managers are shifting their growth toward segments where price competition is lower: private markets, private credit, infrastructure, real assets, alternative strategies, and personalized wealth management.
At the same time, many firms are converting former mutual funds into ETFs—a trend that has accelerated since 2023 and continues to gain momentum in the United States due to the operational and tax advantages of the ETF format.
The War Has Just Begun
Various analysts believe that the pressure on fees will continue to intensify. The growth of index investing, the expansion of automated management, the rise of artificial intelligence applied to portfolio construction, and investors’ increasing sensitivity to costs will continue to favor ETFs.
For active mutual funds, the challenge no longer consists solely of outperforming benchmark indices, but of demonstrating that the added value of active management justifies paying several times more in fees.
In an industry where managing trillions of dollars has become a business of ever-narrowing margins, the great paradox is that never before has so much money been managed while charging so little. And, for now, ETFs are winning that battle.