The state of investing in 2026 is depicted in a specific setting that doesn’t take place on a trading floor. A twenty-six-year-old is scrolling through TikTok on a couch late at night when he stops to watch a video in which a confident-sounding individual with a ring light explains why a cybersecurity ETF is going to “run.” After 45 seconds, the viewer launches and purchases a brokerage app. Not a prospectus. No comparison of expenses to ratios. All that was visible on the screen was a number indicating that the fund was trending, and there was a sense that the audience had seen something. When you multiply that by a few million people, you get one of the most significant changes in the way money flows through markets at the moment.
The tendency is easy to explain and absolutely bizarre to consider. Exchange-traded funds are increasingly being screened and chosen by investors, particularly younger retail investors, using social metrics such as sentiment scores, search volume, mention counts, and community participation on Reddit, YouTube, and TikTok. A financial advisor, a brokerage research portal, and possibly a Morningstar rating were the usual routes to an ETF. A “finfluencer” and a comment area are part of the new route. It’s quicker, more democratic in a way, and, depending on your personality, either an exhilarating modernization or a slow-motion accident waiting to happen.
In reality, the narrative’s speed is what’s propelling it. Stories like “AI will eat the economy,” “clean energy is inevitable,” and “cybersecurity spending only goes up” have long played a part in market dynamics. These days, social media brings those tales to the public’s attention in real time, long before the traditional financial press has compiled them into a neat piece. In a matter of days, a themed ETF that tracks, say, nuclear power or defense technology can move from being obscure to being widely discussed as the story takes on in the algorithmic feeds. The story is followed by capital. Additionally, because so many of these investors are viewing the same screens, the collective behavior becomes somewhat self-fulfilling; high mentions today forecast retail inflows tomorrow, which can result in a short-term price premium that momentarily gives the impression that the crowd is correct.
It is precisely this self-fulfilling characteristic that makes social measurements harmful as a tool for making decisions but helpful as a leading signal. Treating bullish talk as a signal when it consistently precedes a wave of buying on a financial forum is not illogical; rather, it is a fair assessment of where money is going to flow. The issue is that a fund gets pushed up on the way in by the same dynamic, which is equally severe on the way out. Sentiment is quick, erratic, and prone to abrupt reversals. When the narrative cools, the same population who invested in a niche themed ETF during a surge of TikTok enthusiasm may withdraw from it just as swiftly, leaving latecomers with a position that has suddenly dropped twenty percent for no apparent reason.
This is not the first time we’ve watched the film. The proof of concept was the meme-stock age of GameStop and AMC, which showed that concerted retail attention, enhanced by social platforms, could affect markets in ways that experts couldn’t readily rebut or predict. Due to their construction-based diversification, ETFs are a more manageable instrument than individual meme stocks; yet, the same psychology holds true. An AI fund or a clean-energy fund may turn into a sort of communal wager in which the story surrounding the underlying companies is traded rather than the companies themselves. The diversity of viewpoints that keeps markets functioning begins to fade when everyone is watching the same sentiment trackers and finfluencers.
Predictably, the regulators have taken notice, and their recommendations are the kind of reasonable things that are simple to state but difficult to persuade others to adopt. It’s true that FINRA has advised individual investors not to base their financial decisions on social media hype, but it’s also kind of like telling people not to eat dessert. Thoughtful investors have begun to embrace the more beneficial framing, which views social indicators as a source of ideas rather than a final filter. Let TikTok direct your gaze. Don’t let it dictate what you should purchase. The trending fund is not the end of research, but rather its beginning.
The unglamorous nature of that study is precisely what the videos prefer to omit. Over time, the expense ratio is crucial; a fund that charges 0.75% as opposed to one that charges 0.05% can subtly reduce returns in a way that no viral event can make up for. The underlying index is important since many popular thematic ETFs are focused in a small number of speculative names, making the diversification they seem to provide somewhat illusory. Additionally, a thinly traded specialty fund with a large bid-ask spread can cost you actual money on the way in and out, particularly if you’re trying to exit at the same time as everyone else who viewed the same video. This is why liquidity matters in a way that most retail investors never consider until it hits them.
Observing this trend’s development gives the impression that it’s neither the revolution the finfluencers promise nor the catastrophe the old guard fears. It’s more human and messy. People who might never have entered a brokerage office are drawn into markets by social metrics, which truly democratize access to investment ideas.
Additionally, they actually intensify herd behavior in ways that are most detrimental to those with the least amount of experience. In all honesty, this is a tool that, like other tools, rewards those who recognize its limitations and penalizes those who mistake it for a tactic. Sometimes it’s early, sometimes it’s appropriate, and sometimes it’s just noisy. The key to the game is telling the difference, and no sentiment tracker has yet to figure out how to do that for you.
