Hedge fund crowding just hit a record. This is what it looks like
- TEBI
- 11 minutes ago
- 7 min read
Hedge funds are sold on diversification, uncorrelated returns and capital preservation. Goldman Sachs publishes the 50 stocks that turn up most often among hedge funds' largest long positions, and eight of the ten biggest make chips, memory or the machines that make chips. Hedge fund crowding is the reason that list exists, and it is the one part of the pitch an outsider can check.
The language is consistent across the hedge fund industry. The Alternative Investment Management Association, its principal UK trade body, framed a January 2026 podcast on allocator demand around investors continuing to prize hedge funds for uncorrelated returns and capital preservation. Morgan Stanley's midyear outlook, published in July, described hedge funds as delivering differentiated return streams and meaningful diversification. Goldman Sachs Asset Management, the same month, wrote of uncorrelated hedge fund return streams. Each of the three has a commercial or representational interest in how hedge funds are perceived.
Most of what these funds do is invisible from outside. Short positions, derivatives and holdings outside the United States do not appear in a regulatory filing — though Harvard researchers have found that most of an active manager's trading can be predicted from public information alone. What does appear is the disclosed long book, and Goldman packages the most popular part of it as an index. The Goldman Sachs Hedge Industry VIP ETF holds 50 US-listed stocks, chosen because they turn up most often among hedge funds' ten largest disclosed holdings. As at 30/06/2026 its largest positions were Marvell Technology, Applied Materials, SanDisk, Micron Technology, Lam Research, Advanced Micro Devices, Revolution Medicines, Intel, Eli Lilly and Taiwan Semiconductor Manufacturing. Information technology accounted for 39.9 per cent of the fund.
In July that concentration told. CNBC reported on 21/08/2026 that Goldman had informed clients the basket had suffered its worst month against the S&P 500 in more than 20 years of the bank's data — an account of its own basket, drawn from its own dataset — during one of the sharpest reductions in hedge fund market exposure in a decade. The index itself barely moved, returning minus 0.13 per cent on a price basis over the month on S&P Dow Jones Indices' figures. One month settles nothing, and Goldman estimated that US equity long/short funds had still returned about 10 per cent through the middle of August. But the episode is a useful prompt. Investors in these funds are asked to take the differentiation largely on trust. The one window they can look through shows several hundred managers holding the same chipmakers.
What Goldman's VIP basket actually measures
Goldman's Hedge Fund Trend Monitor, produced quarterly by the bank's US portfolio strategy team, aggregates the 13F filings that large US institutional managers must submit within 45 days of each quarter end. The November 2023 edition covered 735 hedge funds holding $2.4 trillion of gross equity positions. From that pool the bank builds the VIP list: the 50 stocks appearing most often among the ten largest holdings of funds running between 10 and 200 distinct US equity positions, a screen intended to separate concentrated, fundamentally driven managers from quantitative funds and private equity mirrors. Goldman is not a neutral observer here. It sells prime brokerage services to the funds it analyses, owns the index the basket is built on and manages the ETF that tracks it.
The filings have limits, which the bank sets out itself. Positions created through options, swaps and futures need not be disclosed, so a fund could offset a monitored long with an unmonitored short. Foreign holdings are not captured. The short-side analysis rests on an assumption that hedge funds account for 85 per cent of all short interest. On the 45-day lag, Goldman argues the delay matters less than most market participants assume: 77 per cent of the stocks held on 30/06/2023 were still held three months later. The fund's own factsheet is less sanguine, warning that some of the information used to build the index may be stale by the time it is used.
Goldman is also careful, in its regulatory filings, about what the index is not. The summary prospectus states that it contains no hedge funds, is not designed to approximate the performance of any hedge fund or group of managers, and should not be considered a hedge fund replication strategy. That is accurate, and it is not the claim here. These are the individual positions hedge funds most commonly hold, and they are public.
One distinction runs through everything that follows. The aggregate hedge fund long portfolio and the basket of hedge funds' most popular positions are not the same thing. On Goldman's own numbers, hedge funds in aggregate were underweight information technology relative to the Russell 3000 by 486 basis points at the start of the fourth quarter of 2023, and by 1,323 basis points at the start of 2025. The basket of their favourite individual holdings, meanwhile, was almost 40 per cent technology by the middle of this year. Hedge fund portfolios in general were not.
Goldman's own description of the basket, in that November 2023 report, does most of the work of explaining July. 'The basket has been a strong historical performer at the cost of high volatility.' The bank noted that its strong 2023 was a reversal from 2021 and 2022, when it had trailed the S&P 500 by 30 percentage points.
How hedge fund crowding reached a record
Crowding measures how far the aggregate hedge fund long portfolio sits in the same names. Goldman's Hedge Fund Crowding Index compares the effective number of positions the aggregate portfolio behaves as though it holds with the actual number of distinct stocks in it. The lower that ratio, the more of the money sits in a smaller set of names. In the third quarter of 2023 the index registered the most crowding in the bank's 22-year data history, and the typical fund held 70 per cent of its long book in its top ten positions. CNBC reported that Goldman found crowding at a record again in the second quarter of 2026. Record hedge fund crowding is a recurring finding rather than a single event.
The two measures connect. The more the money concentrates in the same names, the better a list of most-held positions describes where hedge funds actually are. Crowding is what makes the VIP basket worth looking at in the first place.
July's fall coincided with what Goldman called one of the sharpest episodes of de-grossing in a decade — funds cutting total market exposure, longs and shorts together, rather than switching from one holding to another. The Bank of England, watching from a supervisory rather than a commercial position, reported in its July 2026 Financial Stability Report that hedge funds' equity prime brokerage balances were at record levels, having risen globally by around 40 per cent over the preceding year, with positions more concentrated in sectors such as semiconductors alongside AI-linked share price momentum. It is the same concentration TEBI examined after February's technology sell-off, when index investors turned out to be more exposed to US mega-cap technology than many had realised.
What the return data show
Hedge fund crowding is a fact about holdings, not about returns, and the returns tell a more forgiving story.
BNP Paribas's 2026 Hedge Fund Outlook, drawing on its own prime brokerage data, reported hedge fund correlation with the MSCI World of 0.92 over one year, against 0.80 over three years and 0.76 over five. Beta to the same index, a measure of how far hedge fund returns move for a given move in the market, was 0.24 over 12 months, against 0.15 over five years.
Correlation has risen. Beta has risen too, from a low base, and the two measure different things: 0.92 alongside 0.24 describes funds moving in the same direction as global equities but with much smaller amplitude. Hedge fund volatility in 2025 was 2.43 per cent against the MSCI World's 9.25 per cent. On those numbers the capital preservation claim holds up, and BNP's own conclusion is that diversification remains. A crowded long book has not, so far, translated into a return stream that behaves like the equity market.
Where the evidence cuts the other way
The strongest published evidence on crowding itself also points away from the story. Richard Sias, Harry Turtle and Blerina Zykaj, writing in Management Science in 2016, examined hedge fund equity holdings and found the portfolios more independent of one another than the language of crowding implies. Where funds did buy and sell the same stocks, the authors reported, that common demand was on average positively related to subsequent raw and risk-adjusted returns, and they found no evidence of later reversal even in periods of extreme market stress.
The positions have also, over time, been good ones. As at November 2023, Goldman reported that the VIP basket had beaten the S&P 500 in 59 per cent of quarters since 2001, with an average quarterly excess return of 43 basis points across 90 quarters.
None of that settles this particular question. Sias and colleagues tested whether crowded stocks subsequently underperform. Whether the exposure investors are buying is differentiated is a different question, and only the first is contradicted. No peer-reviewed study was found examining hedge fund crowding in mega-cap technology or AI stocks between 2023 and 2026.
The record, year by year
The comparison is not like for like. The fund holds an equal-weighted basket of 50 stocks, rebalanced quarterly; the S&P 500 is weighted by market value across 500. A concentrated, equally weighted portfolio should be expected to move further than a diversified one in both directions, and the wider evidence on high-conviction funds points the same way.
It does. In 2020 the fund returned 44.00 per cent on net asset value against the S&P 500's total return of 18.40 per cent. In 2022 it returned minus 31.85 per cent against the index's minus 18.11 per cent. In 2023, 39.03 per cent against 26.29 per cent.
The 50 names are there because a large number of managers arrived at the same conclusions at about the same time. Nothing in the record suggests they were wrong to. But the disclosed positions cannot tell an investor whether a fund will diversify a portfolio, because most of what the fund does never reaches a filing. What they can tell an investor is what several hundred expensive managers were all buying at once — and in the middle of this year, they were buying chips.
Resources
Sias, R., Turtle, H. J., & Zykaj, B. (2016). Hedge fund crowds and mispricing. Management Science, 62(3), 764–784.
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