(This commentary first appeared as part of the “2026 Cumberland Advisors Midyear Outlook.” See the “Further Reading” section below for details.)
In our modern financial markets, absolute dollar size has become its own gravitational force. Trillions of dollars can now move with a single product launch. Massive amounts can change on a single corporate earnings call. Or with a single rocket landing or a rocket-launch explosion.
SpaceX was once a scrappy disruptor. It now commands a market valuation that rivals all the legacy aerospace giants combined. Nvidia, propelled by the AI boom, has grown so large that its daily price swings can shift entire indices. And now we have witnessed the first-ever $1 trillion ETF, a milestone once unimaginable. I remember when SPY was launched in 1993. DIA was next in 1997. Sector Spiders followed two years later. No one envisioned that a trillion-dollar number for a single ETF would be reached in a single generation.
So, what are the implications that come with size? As with anything else, there is a debate.
On one hand, scale can be stabilizing. Think of it like a massive chain anchor holding a large ship in a storm. Large ETFs tend to be diversified. They are broadly held. They are liquid and can dampen volatility rather than amplify it.
For a single stock, Nvidia’s size means that its investor base is deep and global. As long as the company performs, size reduces the likelihood of a panic-driven collapse. SpaceX’s massive private valuation gives it access to capital on terms that allow the company time for its needed long-term planning. It currently is not about quarter-to-quarter earnings comparisons. So, from this side of the coin, trillion-dollar financial instruments are like supertankers: slow to turn, hard to tip over, and capable of smoothly navigating the chop around them.
But the counterargument is equally compelling. When a single ETF crosses the trillion-dollar threshold, its flows can distort the very markets it tracks. Nvidia’s enormous market cap means that a bad earnings day can erase more value than the GDP of a small nation. When that happens, it drags indices with it.
And SpaceX, despite its brilliant, imaginative prospects, represents private market risk. When a large company stumbles, the shockwaves can be huge. They hit pension funds, sovereign wealth funds, and institutional portfolios that have quietly tied themselves to the company’s ascent. In this framing, size doesn’t stabilize—it magnifies shocks.
Last, there’s the psychological dimension. Some investors behave differently when numbers reach the trillions. Is a trillion-dollar ETF “too big to fail?” Does the classic call for a government bailout surface? That is the ongoing debate about “moral hazard.” Large size can create complacency.
Nvidia’s meteoric rise can tempt investors to treat it as a permanent fixture rather than a company subject to competitive and technological cycles. SpaceX’s scale can make its ambitions seem inevitable, even though aerospace remains one of the riskiest industries on earth. When financial objects become enormous, narratives become enormous too—and narratives can be volatile. Just consider the language about a resort vacation on the moon. Maybe in low gravity I can throw my fly rod 500 feet.
Joking aside, it’s impossible to ignore the benefits of scale in innovation and efficiency. SpaceX’s size allows it to lower launch costs for the entire world. Nvidia’s scale accelerates AI development across industries. A trillion‑dollar ETF offers low fees, high liquidity, and broad access to markets that once required specialized knowledge. So in this sense size democratizes opportunity. It spreads risk. It builds infrastructure that smaller investors cannot otherwise obtain.
So, does size matter? Absolutely. But whether it stabilizes or destabilizes depends on the lens. Large financial entities can be anchors or amplifiers, depending on how they’re built and how investors behave around them. The real challenge is not their scale, but our assumptions about what that scale guarantees.
Trillions of dollars can calm the seas—or they can make the waves taller. The market decides which, and it rarely decides quietly.
(By way of disclosure, I own SPY in my portfolio. I do not hold SpaceX or Nvidia.)
Further Reading
As noted above, “Size Matters — Or Does It?” was first published in Cumberland Advisors’ recently released midyear outlook. This missive goes out directly to clients, but it is also available to readers at Seeking Alpha. You can read the Cumberland’s outlook in its entirety at this link:
I would like to thank Seeking Alpha for their redistribution of the midyear report, including my portion, to the 218,000 investors in their database.
As this commentary is published, I am traveling to Leen’s Lodge in Grand Lakes Stream, Maine, for our annual Camp Kotok gathering, now organized by the Global Interdependence Center (GIC). For those new to the Kotok Report this year, my friend Bill Kennedy of RiskBridge Advisors has described Camp Kotok this way:
Camp Kotok is an invitation-only gathering of prominent economists, strategists, asset allocators, analysts, legal experts, scientists, policymakers, and journalists. The event is best described as a mashup of an economics conference and adult summer camp. It is hosted at Leen’s Lodge and brings new and old friends together for great fishing, food, and fellowship. This marked Camp Kotok’s 21st year (excluding 2020 due to the Covid pandemic).
(“Postcard from Maine,” commentary republished at the Kotok Report, August 25, 2024)
Stay tuned for more about Camp Kotok and this year’s topics next week.
Disclosure:
The information posted on this website (including any related blog, podcasts, videos, and social media) reflects the personal opinions, viewpoints, and analyses of David R. Kotok. David R. Kotok is an independent contractor. He may independently receive payments from various entities for consulting, advisory and board functions, speaking fees, book royalties, advertisements in affiliated podcasts, blogs, and emails. Inclusion of such advertisements does not constitute or imply endorsement, sponsorship, or recommendation thereof, or any affiliation therewith, by the Content Creator or by David R. Kotok.
Nothing on this website constitutes investment advice. It should not be construed as an offer soliciting the purchase or sale of any security mentioned. Nor should it be construed as an offer to provide investment advisory services by David R. Kotok. The information provided on this website (including any information that may be accessed through this website) is not directed at any investor or category of investors and is provided solely as general information.
This content, which may contain security-related opinions and/or information, is provided for informational purposes only. Do not rely upon it in any manner as investment advice. It is not an endorsement of any practices, products or services. You should consult your own advisers as to legal, business, tax, and other related matters concerning any investment.
Any charts provided here are for informational purposes only and should not be relied upon when making any investment decision. As always please remember investing involves risk and possible loss. Any projections, estimates, forecasts, targets, prospects, and/or opinions expressed are subject to change without notice and may differ or be contrary to opinions expressed by others. Information in charts has been obtained from third-party sources believed to be reliable; however, David R. Kotok makes no representations about the accuracy of the information.
