LEGO beats the stock market. A 2021 study from the Higher School of Economics in Moscow found that LEGO sets appreciated at an average of 11% annually between 1987 and 2015, outperforming gold, stocks, and bonds over the same period. This finding got picked up by financial media, went viral in the AFOL community, and has been cited approximately ten thousand times since, usually by people trying to justify a purchase to a skeptical partner.
The study is real. The finding is legitimate. And the way it gets used in the wild is almost entirely misleading.
I've been tracking LEGO values for several years as a collector, not as an investor, though the line blurs when your collection reaches a certain size. I've seen what appreciates and what doesn't. I've made mistakes. I've also seen genuine appreciation on specific sets. What follows is the honest version of the LEGO investment conversation — the one that includes the parts most people leave out.
The HSE study analyzed 2,322 sets retired between 1987 and 2015. It found that on average, sets appreciated 11% annually in the first three years after retirement, with some categories outperforming dramatically. But "on average" is doing a lot of work in that sentence.
The study also found that roughly 40% of sets do not appreciate meaningfully after retirement. These sets — typically licensed products with broad market appeal, City sets, and anything overproduced — hold flat or decline in real terms once you account for inflation and storage costs. The 11% average is pulled up by a smaller number of high-performing sets, primarily in the Creator Expert, Star Wars Ultimate Collector Series, and Technic flagship categories.
The other thing the study measures is closed-box, mint-condition sets. If you're buying sets to invest, you are buying sealed boxes and storing them for ten to fifteen years without opening them. The study isn't about collectors who bought sets they loved and later sold them — it's about arbitrage on sealed retail product. Those are very different activities with very different cost structures.
When people cite "LEGO beats the S&P 500," they're usually imagining a version of this that involves buying sets they like, building them, and then discovering they're worth money later. That version does happen occasionally. It's not the repeatable, systematic thing the investment framing implies.
Let's run the honest math on a hypothetical LEGO investment.
You buy a Creator Expert modular at retail — let's say $200 — on release day. The set retires in two years. You hold it for five more years after retirement. Historical data suggests a well-chosen modular might appreciate to $350–$450 in that window. Let's use $400. That's a 100% return over seven years, or roughly 10% annually. Sounds good.
Now add the costs that don't appear in that calculation. Storage: sealed LEGO boxes are large and fragile. Storing a serious collection of sealed sets requires space that has real cost, either as rent, or as opportunity cost of space you're using for boxes instead of something else. Insurance: your homeowner's or renter's policy probably doesn't cover a collection at replacement value without a rider. Condition risk: a single crushed corner or yellowed box can reduce a "mint" set to "good" or "acceptable" and cut 20–30% from its secondary market value. Transaction costs: eBay takes approximately 13% of the sale price. PayPal takes another 3%. You're at 16% off the top before you start counting your time to photograph, list, pack, and ship.
Run those numbers on the $400 sale price. After eBay and PayPal fees, you're at $336. Subtract seven years of storage and condition risk — call it conservative $30 net in those costs — and you're at roughly $306 on a $200 investment over seven years. That's about 6% annually, before taxes. The S&P 500 returned approximately 14% annually over the decade ending 2021. Your LEGO "investment" underperformed a basic index fund by a significant margin, with substantially more effort and risk.
The math works only at the top of the market — the sets that appreciate 300% or more, usually UCS Star Wars at retirement or large Creator Expert sets with strong cult followings. Those exist. They are not the average outcome, and they are not predictable in advance with enough certainty to build a strategy around.
In the LEGO secondary market, you encounter three distinct profiles, and they have very different experiences.
The first is the professional reseller. This person treats LEGO like any other retail arbitrage product — buying on sale, at clearance, or via bulk lots, and flipping quickly, often within weeks. They operate on thin margins and high volume. Their relationship to the hobby is purely transactional. They're competent at what they do, but it has almost nothing to do with collecting or appreciation in the investment sense. They're finding inefficiencies in retail pricing, not investing.
The second is the speculative long-term holder. This person buys sealed sets, stores them carefully, and waits. They've usually read the data, understand the historical performance of specific categories, and approach this with real discipline. Some of them make money. They also tie up capital for a decade, deal with all the storage and condition issues described above, and often discover that the secondary market for their specific sets is thinner and more volatile than historical averages suggested. This is closest to actual investing, and it's genuinely hard.
The third — and most common — type is the collector who tells themselves their hobby is also an investment. This is usually motivated reasoning. The sets they're buying are sets they'd buy anyway. The "investment" framing is a way of making the spending feel responsible. There's nothing wrong with this psychologically, but it shouldn't be confused with a strategy. A set you bought because you love it and will probably build eventually is not an investment in any meaningful sense of the word.
I'm mostly in the third category, with occasional honest forays into the second. I find it useful to be clear about which is which.
If you're going to invest in LEGO with any seriousness, historical performance points to a handful of categories that have real track records rather than anecdotal wins.
Creator Expert modulars — the Modular Buildings series — have the longest and most consistent appreciation history in the LEGO catalog. Every retired modular commands significant premium. The series has a dedicated collector base, builds toward a continuable city layout, and LEGO has never reissued a retired modular. That combination creates genuine scarcity. If you're going to buy anything sealed for long-term hold, this is the category with the strongest case.
Star Wars Ultimate Collector Series ships also have strong track records, though the market is more volatile and more sensitive to licensing news and fan sentiment — our guide to the best Star Wars sets for adults covers the current lineup and what's worth watching. The Millennium Falcon, Death Star, and large-format ships from the early UCS era have appreciated dramatically. Newer UCS releases are harder to predict because production runs are larger and the buyer base is more saturated.
Technic flagship sets — large, highly complex, licensed vehicles — have shown consistent appreciation but take longer. The machinery collector base overlaps less with the mainstream AFOL community and more with scale-model collectors, which creates a different demand structure.
Everything else is speculative. Licensed themes, City sets, licensed characters — the data is much less consistent and much more dependent on cultural cycles that are difficult to predict.
Here's the honest conclusion after several years of watching this market closely.
If you're a collector first and you're asking whether collecting might also be financially rational over a long horizon — for the specific categories above, in mint condition, with proper storage — the answer is: probably yes, in the same sense that buying art you love might be financially rational. It's not an investment strategy. It's a hobby that might have financial upside, which is different and better than most hobbies.
If you're asking whether LEGO is a good investment vehicle compared to a diversified index fund — the answer is no, for most people, in most circumstances. The transaction costs, liquidity constraints, storage requirements, condition risks, and unpredictability of the secondary market combine to make it worse than passive index investing on almost every objective measure, with the exception of the specific high-performing categories in the specific conditions described above.
What LEGO is excellent at is being a hobby that holds value better than most hobbies. The sets you buy, build, and love aren't worthless afterward. The secondary market is real and reasonably liquid for desirable sets. You can spend money on LEGO and, if you're thoughtful, lose very little of it in the long run — especially if you buy at or below retail, build and display selectively, and sell when the market is right rather than when you need the money.
That's a good deal for a hobby. It's not what most investment-framed LEGO content is actually selling you on, but it's what's true. And I'll take true over optimistic every time.
The buying behavior that makes this work — patience, selectivity, willingness to wait — is the same discipline behind stopping release-day purchases. The sets bought before I had that discipline show up in my regret list. And if you're weighing modulars specifically against alternatives, the Lumibricks vs. LEGO Modulars comparison covers the display and value tradeoffs in detail.