ETF Mania Hits a Wall: Why Not All Strategies Survive the Great Passive Shakeout

There’s a dirty secret in the ETF world that nobody wants to talk about: not every strategy deserves to be wrapped in a shiny, liquid, low-fee package and handed to the masses. As of February 27, 2026, the ETF market is entering its awkward adolescence. The easy money has been made, the low-hanging fruit picked clean, and now the cracks are starting to show. CNBC is already running with it, 'Not all strategies belong in an ETF wrapper. Here’s why.' The shakeout is real, and it’s coming for the most crowded, least defensible products in the space.

Let’s rewind. For the past decade, ETFs have been the answer to everything. Want exposure to AI? There’s an ETF for that. Want to bet on the price of water in California? There’s an ETF for that too. The wrapper became the product, and the product became the narrative. Flows chased performance, and performance chased flows. It was a virtuous cycle, until it wasn’t.

Now, the market is waking up to the reality that liquidity is not a birthright. The most crowded 'non-traditional' strategies are getting shaken out, and the carnage is just beginning. The poster children for this trend are the thematic ETFs, AI, blockchain, ESG, you name it. They soared on hype and cheap money, but now they’re struggling to justify their existence in a world where returns actually matter again.

The numbers are brutal. Thematic ETF closures hit a record in 2025, with more than 120 funds shuttered in the US alone. Assets under management in the bottom quartile of ETFs have shrunk by 30% year-on-year, and secondary market liquidity has dried up. The bid-ask spreads on some of these products are wider than the Grand Canyon, and daily volume is a rounding error. If you’re holding one of these zombie ETFs, good luck getting out without leaving a chunk of your P&L on the table.

The macro backdrop is not helping. With the Fed on pause and growth stalling, investors are rotating out of speculative themes and back into core exposures. The AI trade, once the darling of Wall Street, is now a source of anxiety. US stock futures are faltering on 'AI jitters,' and the Nasdaq is bracing for its steepest monthly drop since the pandemic. The message is clear: The party is over, and the hangover is just beginning.

What’s driving this shift? Part of it is structural. The ETF ecosystem was built for scale and liquidity, but not every strategy can deliver both. The more esoteric the theme, the harder it is to maintain tight spreads and robust trading. When the flows reverse, the exit doors are a lot smaller than they looked on the way in. The other driver is psychological. Investors are finally realizing that not all ETFs are created equal. The wrapper doesn’t magically turn a bad strategy into a good one. If the underlying assets are illiquid or the theme is played out, the ETF is just a ticking time bomb.

The historical parallels are instructive. Remember the leveraged and inverse ETF boom of the late 2010s? That ended with a wave of closures and regulatory crackdowns. The current shakeout is different in scale but similar in spirit. The market is doing what it always does, rewarding discipline and punishing excess. The survivors will be the funds that offer real value, not just a clever ticker symbol.

Strykr Watch

Technically, the ETF landscape is a minefield. The core equity and bond ETFs, think S&P 500, Treasuries, and broad sector funds, are holding up well. Liquidity is solid, spreads are tight, and flows are steady. But the thematic and niche products are a different story. Many are trading at persistent discounts to NAV, a sign that the market doesn’t trust the underlying valuations. Volume is anemic, and the order book is thin.

If you’re trading these products, watch the liquidity metrics like a hawk. Anything with a spread wider than 0.5% or daily volume below $5 million is a candidate for closure or a forced unwind. The technical levels matter less than the structural ones, if the fund can’t attract assets, it’s toast.

The options market is also sending a clear signal. Implied volatility on the most speculative ETFs has spiked, while the blue-chip funds remain calm. The market is pricing in more pain for the former and relative safety for the latter.

The bear case is obvious: More closures, more forced selling, and more pain for holders of illiquid products. The bull case is that the shakeout will create opportunities for disciplined traders to pick up bargains in the rubble. But you need to be selective. Not every fallen ETF is worth rescuing.

The risks are clear. If the current outflows accelerate, we could see a cascade of closures and forced liquidations. That would hit the most illiquid products hardest and could spill over into the broader market if the unwind is disorderly. The other risk is regulatory. If the SEC decides to tighten the rules on ETF structure or disclosure, some funds could be forced to shut down overnight.

The opportunity is to focus on quality. Stick to ETFs with deep liquidity, tight spreads, and a proven track record. If you’re feeling brave, look for funds trading at unjustified discounts to NAV and bet on a rebound. But don’t get greedy. The shakeout is not over, and there will be more casualties before it’s done.

Strykr Take

The ETF market is growing up, and not everyone is going to make it. The days of easy money and indiscriminate flows are over. The winners will be the funds that offer real value, real liquidity, and real transparency. The rest are roadkill. If you’re still chasing the next hot theme, it’s time to rethink your strategy. In this market, survival is the new alpha.