The complete history of ETFs
Nine trillion dollars now sits inside exchange-traded funds worldwide. Three decades ago, the entire category did not exist, and the product that eventually became the ETF was rejected once before it ever succeeded. This guide walks through where ETFs actually came from, how they work beneath the surface, who builds them, and where to go next if you want to understand every corner of this market.
How a Rejected 1989 Product Became a $9 Trillion Industry
The story starts with a crash, not a launch. On October 19, 1987, US markets fell nearly 23% in a single session, the event now known as Black Monday. In the years that followed, the SEC itself raised the idea that baskets of stocks could be packaged into a single tradable security, precisely so that large sell orders could be absorbed without destabilizing the entire market the way index arbitrage and program trading had during the crash. David Ruder, who chaired the SEC from 1987 to 1989, has said the idea was floated as a suggestion, not expected to be acted on, and that the product the American Stock Exchange eventually built went far beyond what the SEC had originally imagined.
Nathan Most and Steven Bloom, working at the American Stock Exchange, picked up that idea and ran with it. Both men came from backgrounds in physical commodities and warehouse receipts rather than traditional fund management, which shaped how they approached the structure. Working under the direction of Ivers Riley and with legal design from attorney Kathleen Moriarty, later nicknamed "SPDR Woman" within the industry, the team filed for approval of a new investment wrapper in 1989.
That first attempt failed. The product, called Index Participation Shares, was designed to track the S&P 500 and briefly traded on the American Stock Exchange and the Philadelphia Stock Exchange, drawing real investor interest almost immediately. The Chicago Mercantile Exchange sued, arguing the product functioned like a futures contract rather than a security, and a federal court in Chicago agreed. Index Participation Shares were pulled from the market before they ever had the chance to mature into anything larger.
While the SEC and the American Stock Exchange worked through the regulatory aftermath of that failed launch, Canada moved first. The Toronto Stock Exchange listed the Toronto 35 Index Participation Units, known as TIPS, on March 9, 1990, tracking the exchange's own TSE 35 Index. Unencumbered by the same regulatory process working through Washington, Canadian regulators approved the product within roughly a year of its proposal. TIPS proved immediately popular, and its early success is widely credited with pushing US regulators to keep working toward a version that could survive legal challenge domestically.
It took more than four years from that first 1989 filing for the SEC to grant final approval. The Standard & Poor's Depositary Receipts, structured this time as a unit investment trust rather than anything resembling a futures contract, listed on January 22, 1993, on the American Stock Exchange.
Most and Bloom named it after the Standard & Poor's 500 Index it tracked, and the market quickly shortened Standard & Poor's Depositary Receipts to the nickname SPDR, then to "Spider," and the ticker SPY has carried that name ever since.
SPY is still trading today, more than three decades later, and remains one of the most heavily traded securities on any exchange in the world. It took roughly three years for SPY to cross $1 billion in assets under management, a pace that looks almost leisurely by today's standards, where a single new ETF launch can gather that much in its first weeks. What began as a single listing, born out of a failed 1989 product and a Canadian head start, became the founding template for an entire asset class.
How the ETF Family Multiplied, Year by Year
Growth accelerated in ways few people at the American Stock Exchange likely anticipated in 1993. The SPDR Mid-Cap Trust, ticker MDY, listed in May 1995, just over two years after SPY, extending the same structure down into mid-capitalization stocks. In March 1996, Barclays Global Investors introduced World Equity Benchmark Shares, or WEBS, a family of 17 funds giving US investors direct, exchange-traded access to individual foreign stock markets including Canada, Mexico, and Brazil for the first time. WEBS was later rebranded, and by 2000 it had become the iShares brand that BlackRock now owns and operates as the largest ETF platform in the world.
The rest of the 1990s brought steady, deliberate expansion rather than explosive growth. The Select Sector SPDR family launched in 1998, breaking the S&P 500 into individual sector-tracking funds for the first time. In March 1999, the Invesco QQQ Trust listed on the Nasdaq, tracking the Nasdaq-100 Index just as the dot-com boom was accelerating, and it remains one of the most actively traded securities in the world today. By January 1, 2000, only around 32 exchange-traded products existed in the United States, a figure that makes the scale of the market today difficult to fully appreciate.
The 2000s brought the innovations that turned ETFs from an equity-market tool into a genuine substitute for large parts of a diversified portfolio.
The iShares Core S&P Small-Cap ETF launched in 2000, extending index-tracking exposure into small-capitalization stocks. In July 2002, iShares listed the first four fixed income ETFs, covering short-term and long-term Treasuries and investment-grade corporate bonds, opening bond market access to ordinary investors in a way that had never existed before. By that November, roughly 132 exchange-traded products were listed in the US; three years later, in December 2005, that number had grown to around 232.
Commodities were next. The SPDR Gold Trust listed in November 2004 as the first ETF backed by physical gold bullion, followed by a second gold-backed fund from iShares in January 2005. The first exchange-traded notes, a related but legally distinct structure offering exposure to commodity futures, arrived in November 2006. That same year, ProShares launched the first leveraged and inverse ETFs, introducing daily-reset mechanics designed to amplify or invert the return of an underlying index over a single trading session, a structure that later became central to FINRA's suitability concerns around complex ETFs.
The real inflection point for mainstream adoption came with the 2008 financial crisis, when investors began moving en masse toward lower-cost, more transparent ways to hold market exposure. In 2009, Barclays sold its entire Barclays Global Investors division, iShares included, to BlackRock in a deal reported at roughly $13.5 billion, instantly making BlackRock the dominant force in the ETF market it still leads today. Through the 2010s, the arrival of commission-free trading on major brokerage platforms removed one of the last practical barriers keeping everyday retail investors out of the ETF market entirely, and adoption accelerated again.
The sheer scale of the market today is easy to understate against that slow, contested origin. Thousands of individual ETFs now trade across US exchanges alone, spanning nearly every country, sector, asset class, and investment strategy an investor could realistically want exposure to, a level of choice that simply did not exist before the mid-1990s. Vanguard entered the ETF market in 2001 with its own structure built on top of existing index mutual funds, becoming a third major force alongside State Street and iShares. Each new entrant pushed fees lower and choice wider, and that competitive pressure has never really let up since.
The Exchange-Traded Fund (ETF) entry in the FRC dictionary covers the formal definition and structure in full. Worth reading first if any of the mechanics below feel unfamiliar.
What Actually Sits Inside an ETF
An ETF is a pooled investment vehicle that holds a basket of assets, usually stocks or bonds, and trades on an exchange the same way an individual stock does. It is not a mutual fund wearing a different label, even though the two share some legal DNA. A mutual fund prices once per day, after the market closes. An ETF prices continuously, all day long, because it is actually trading on an exchange in real time.
Most ETFs track an index rather than relying on a manager to pick individual holdings, and they do it through one of two methods. Full replication means the fund buys every single security in the index, in the same proportion as the index itself, which works well for large, liquid indexes like the S&P 500. Sampling means the fund buys a representative subset of the index's holdings, chosen to behave as closely as possible to the full index, which is more common in bond indexes or narrower international markets where buying every single underlying security would be impractical or prohibitively expensive.
Tracking error and tracking difference both describe how closely a fund actually follows its target index, though the two terms measure slightly different things. Tracking difference is simply the gap between the fund's return and the index's return over a given period. Tracking error measures the volatility of that gap over time, and a fund with low tracking error is behaving consistently relative to its benchmark, even if its average tracking difference is not exactly zero. Fees, sampling decisions, and cash held for redemptions are the main reasons a fund's return never perfectly matches its index. A fund holding foreign securities can also see its tracking difference affected by currency movements and local withholding taxes on dividends, factors entirely outside the fund manager's control.
Behind every ETF is a legal structure registered under the Investment Company Act of 1940, most now organized under SEC Rule 6c-11, the framework that standardized how ETFs operate without requiring an individual regulatory exemption for each fund. That single rule change, finalized in 2019 after years of the SEC issuing individual exemptive orders one fund at a time, is a large part of why the number of ETFs on the market has grown so quickly since. Before Rule 6c-11 existed, a new ETF sponsor had to apply for its own individual exemptive order from the SEC before it could even launch a fund, a slow and expensive process that limited how quickly the market could grow, and one that echoes the same four-year approval delay SPY itself had to work through in the early 1990s.
How Creation and Redemption Actually Work
Shares in an ETF are not created the way shares in a company are created. A small group of large institutions, known as authorized participants, deliver baskets of the underlying securities to the fund in exchange for new ETF shares, a process called creation. The reverse process, redemption, lets an authorized participant hand ETF shares back in exchange for the underlying basket. This mechanism is what keeps an ETF's market price closely tied to the value of what it actually holds, and it is also what makes ETFs more tax-efficient than most mutual funds, since the in-kind nature of the exchange generally avoids triggering the capital gains distributions that mutual fund shareholders often absorb.
This creation and redemption process also explains why ETFs tend to trade so close to their underlying value. If an ETF's market price drifts too far above the value of its holdings, authorized participants can profit by creating new shares and selling them into the market. If the price drifts too far below, they can buy shares on the open market and redeem them for the more valuable underlying basket. That constant arbitrage activity, carried out continuously by professional market participants rather than retail investors themselves, is what keeps the premium or discount to net asset value small under normal trading conditions, though it can widen meaningfully during periods of market stress or in less liquid corners of the ETF market.
ETF liquidity actually operates on two separate levels, and confusing the two is one of the most common mistakes new investors make. Secondary-market liquidity is what most people see: the trading volume and bid-ask spread visible on an exchange at any given moment. Primary-market liquidity sits behind that, in the creation and redemption mechanism itself, and it means that even a thinly traded ETF can often be bought or sold in large size without much price impact, because authorized participants can create or redeem shares to meet that demand directly. A fund's daily trading volume alone can understate how liquid it actually is.
The Mechanics Retail Investors Rarely See
Three structural mechanics inside this system rarely get covered outside institutional research, and understanding them separates a surface-level grasp of ETFs from a genuine one.
The first is the heartbeat trade. An ETF that has built up large unrealized capital gains in its portfolio, often around an index rebalance, can offload those gains without ever triggering a taxable distribution to shareholders. An authorized participant creates a large block of new ETF shares, and within a matter of days, redeems an equivalent block back, receiving a custom basket loaded specifically with the fund's highest-gain holdings in exchange. On a volume chart, the brief spike in shares outstanding followed by an almost immediate drop gives the transaction its name. The mechanism relies on Section 852(b)(6) of the Internal Revenue Code, which allows a fund to distribute appreciated securities to an authorized participant without recognizing a taxable gain, and it became significantly easier to execute once SEC Rule 6c-11 standardized the use of custom, non-pro-rata redemption baskets in 2019. Research on the practice has found that roughly a third of US ETFs use at least one heartbeat trade in a given year, averaging around two per fund annually, heavily concentrated around index reconstitution dates.
The second is authorized participant concentration. Most ETFs list more than a dozen authorized participants on paper, but in practice only a small handful actually perform the day-to-day arbitrage that keeps a specific fund's price aligned with its NAV. SEC data examined by the Bank of Canada found that in 2019, just three authorized participants carried out 82% of all gross creation and redemption activity across US fixed income ETFs. That concentration became visible to the wider market in March 2020, when bond market liquidity seized up and authorized participants pulled back from arbitrage because the risk of holding illiquid bonds on their own balance sheets outweighed the profit available. Corporate bond ETFs traded at an average discount to NAV of roughly 3.4% during that period, with some funds exceeding 8%, briefly behaving less like an open-end index fund and more like a closed-end fund whose price had decoupled from the value of what it actually held.
The third is the tracking drag created by index reconstitution itself. When a major index like the S&P 500 announces which stocks it will add or remove, that change is not a surprise to the market. Sophisticated traders anticipate the addition and buy ahead of the funds that are contractually required to buy on the effective date, pushing the price up before the ETF's own purchase ever happens. Academic research on S&P 500 additions between 1990 and 2002 found average abnormal returns of roughly 8.8% in the days surrounding the effective date, with about 4% of that reversing over the following month once the forced buying had passed. An index-tracking ETF, bound by its mandate to hold the index as constructed, has no way to avoid buying into that temporary premium, producing a quiet tracking cost that has nothing to do with the fund's expense ratio and rarely appears in any headline performance figure.
Who Builds and Runs These Funds
Every ETF has a sponsor, the financial institution that designs the fund, registers it with regulators, and brings it to market. Some of the largest asset managers in the world compete directly in this space, and the competition between them has been one of the biggest drivers of falling ETF fees over the past decade.
JPMorgan is one of them. The JPMorgan dictionary entry covers its full institutional history, including its more recent move into the ETF market with products such as its 100% US Treasury Securities Money Market ETF, listed on NYSE Arca. BlackRock, through its iShares platform, is currently the largest ETF issuer in the world by assets under management, a position built substantially on the 2009 Barclays Global Investors acquisition described above. Vanguard and State Street round out the group of dominant providers, each running hundreds of listed funds across nearly every asset class and investment style available, while firms such as Invesco have built strong positions in specific, heavily traded funds like QQQ rather than competing across the entire market.
Understanding who actually stands behind a fund matters. It affects the fund's cost structure, its trading liquidity, and in some cases the specific index or strategy it tracks. Two ETFs tracking the same broad index can still differ meaningfully in their expense ratio, how closely they actually track that index over time, and how easily large orders can move in and out of the fund without disturbing its price.
Buying an ETF works exactly like buying a stock. An investor places an order through a brokerage account using the fund's ticker symbol, the same way they would for any individual company. Some of the largest and most recognizable ETFs by assets under management, including SPY, IVV, and VOO, all track the same S&P 500 Index but are sponsored by three entirely different competing providers, which is a useful illustration of how much competition on cost and structure can exist even among funds tracking an identical benchmark. An investor comparing two index-tracking ETFs is really comparing sponsors, fee structures, and trading liquidity, not the underlying index itself.
An ETF's expense ratio is the annual cost of running the fund, expressed as a percentage of assets and deducted gradually from the fund's returns rather than billed to the investor directly. It covers the sponsor's management fee, administrative costs, and the operational work of running the creation and redemption process day to day. Because that fee compounds over years of holding a fund, even a small difference in expense ratio between two ETFs tracking the same index can meaningfully affect long-term returns, which is exactly why fee competition between providers like BlackRock, Vanguard, and State Street has been such a persistent theme since the 2000s.
Institutional investors were the ETF market's original audience, and they remain a significant share of daily trading volume even today, using ETFs to move large amounts of capital in and out of the market quickly around portfolio rebalancing or hedging needs. Retail investors came to the category later, gradually, as brokerage commissions fell and financial advisors began recommending ETFs over mutual funds for their lower costs and daily transparency. That shift from a specialist, institutional tool toward a mainstream retail product mirrors almost exactly how the broader story of ETF adoption unfolded, decade by decade, from 1993 onward. Financial advisors managing client portfolios increasingly build entire allocations out of a handful of low-cost, broad-based ETFs rather than a larger number of individual stocks or actively managed mutual funds, a practice that has itself become a significant driver of continued inflows into the category.
Building the Credentials to Work With ETFs
Reading about ETFs is one thing. Being able to demonstrate that knowledge to an employer is another. Every major provider named above, JPMorgan included, hires directly into roles that require a working, examinable understanding of exactly the material this guide covers: fund structures, market mechanics, and the regulatory framework behind them.
The SIE Exam Preparation course covers the foundational securities-industry knowledge every entry-level candidate needs, ETFs included. For anyone moving further into a brokerage or sales role, the Series 7 Exam Preparation course builds directly on that foundation with the deeper product knowledge FINRA requires for a licensed registered representative.
Course preparation is one part of standing out. A verified Digital Profile, built through FRC's Professional Membership, gives an employer something a resume alone cannot: real-time evidence of the courses a candidate is actually studying and the progress they have actually made, rather than an unverified claim sitting in a CV. In a hiring market where every applicant lists the same adjectives, visible, verified development is what actually gets noticed.
How Regulators Oversee the ETF Market
ETFs sit under two layers of regulatory oversight, and the split traces directly back to the product's contested origin as something the Chicago Mercantile Exchange once argued was a futures contract rather than a security. On the fund side, the SEC governs how an ETF is structured, how it prices, how it discloses its holdings, and how it manages liquidity risk. Daily portfolio transparency, in particular, is one of the defining features that separates most ETFs from actively managed mutual funds, which typically disclose their holdings only on a quarterly basis.
On the trading side, FINRA governs how broker-dealers handle ETF orders, market them to retail investors, and assess whether a specific ETF is suitable for a given client, a question that became especially important once ProShares introduced leveraged and inverse ETFs in 2006, where the daily-reset mechanics can produce very different results over time than a simple buy-and-hold investor might expect.
FINRA's suitability requirements, most directly FINRA Rule 2111, sit at the center of that concern. A broker-dealer recommending an ETF to a retail client has to consider that client's actual financial situation and investment objectives before making the recommendation, not simply execute whatever order comes in. That obligation carries real, practical weight with leveraged and inverse products specifically, and with newer categories entering the market as well, since their mechanics are genuinely more complex than a standard index-tracking fund and can produce outcomes that surprise an investor who has not read the fine print. A leveraged ETF resets its exposure daily, which means its return over weeks or months can diverge substantially from a simple multiple of the index's return over that same period, particularly in volatile markets where the index moves sharply in both directions.
This guide's companion piece on how ETFs are regulated and traded goes into that framework in full detail, covering the specific SEC and FINRA rules that shape day-to-day ETF trading, along with a deeper look at heartbeat trades, authorized participant concentration, and index reconstitution drag.
Why the Market Keeps Growing
Every year brings new entrants into the ETF market and new categories of fund, in the same spirit as the steady 1995-through-2006 expansion described above. Bond ETFs, sector ETFs, thematic ETFs, and international ETFs have each opened access to markets that used to require far more capital and far more specialized knowledge to reach directly. Equity ETFs remain the largest single category by assets, but fixed income ETFs, the category iShares pioneered in 2002, have been among the fastest-growing in recent years, giving everyday investors a way to access bond market exposure that was historically much harder for individuals to build on their own. Currency and real estate ETFs extended the same structure further still, letting an investor gain targeted exposure to a single foreign currency or a basket of real estate investment trusts through one exchange-traded ticker rather than assembling that exposure themselves through direct purchases. Sector ETFs, following directly from the Select Sector SPDR family that first launched in 1998, let an investor target a single industry, such as technology or healthcare, without researching and selecting individual companies within it.
The most recent wave, spot Bitcoin ETFs, extended the same basic structure Nathan Most and Steven Bloom built in 1993 into an entirely new asset class, proving the format's flexibility more than three decades after SPY first listed. Smart beta and factor-based ETFs, a category iShares also helped pioneer around 2000, have similarly taken strategies that were once available only to institutional investors and packaged them into a single, exchange-traded product any investor can buy.
This guide's companion piece on ETF types, costs, and investment strategy covers each of these categories individually, along with the practical questions every investor eventually asks: what an ETF actually costs to hold, how it is taxed, and how it compares to a mutual fund or an individual stock.
The story of the ETF is really the story of a rejected 1989 product, a Canadian head start, and a four-year regulatory fight that eventually produced one of the most successful financial innovations of the past half-century. Every fund trading today, from the largest bond ETF to the newest thematic fund, traces its lineage back to that first SPY listing in January 1993, and further back still, to the failed Index Participation Shares of 1989 and the market crash two years before that made investors and regulators start looking for something better in the first place.
