The Sudden Unraveling of Wall Street’s Momentum Trade

Wall Street’s hottest trade has gone ice cold.

For years, it paid off to buy stocks that were rising in price—and bet against struggling shares. The momentum trade was especially profitable this year, as investors piled into hot stocks including Micron Technology, Nvidia, Advanced Micro Devices and other artificial-intelligence darlings while wagering against those likely to be hurt by the embrace of AI.

The S&P 500 Momentum Index soared 44% in the second quarter, its best quarterly performance on record, and it surged 133% over the past five years, nearly double the broad market’s performance.

Mega funds and rookie investors alike piled into the trade, some using leverage and options contracts in an effort to amplify their returns, propelling the underlying shares higher.

“It is a self-fulfilling prophecy,” said Matthew Tym, managing director at Cantor Fitzgerald, of the trade.

Suddenly, the trade is a loser. The momentum index has tumbled more than 9% since July 1, lagging behind the S&P 500’s 2.8% gain. The index—which tracks stocks in the S&P 500 based on a “momentum score”—is on track for the biggest quarterly underperformance in 25 years. July was the second-worst month for the momentum trade in around 40 years, according to Bank of America estimates; the only month worse was April 2009, in the teeth of the global financial crisis.

Hedge funds that bought momentum shares while shorting low-momentum stocks suffered even more. At the same time, a basket of the most popular stocks held by hedge funds tracked by Goldman Sachs recorded its biggest one-month underperformance in July relative to the S&P 500 in more than 20 years, according to the bank’s analysts.

Momentum trading is based on a rather simple observation: Investments that go up tend to keep outperforming; those that underperform often remain laggards. This kind of trading might seem too simple a stock-picking strategy to work. Yet it often has.

“For decades, it didn’t take a lot of sophistication to run a momentum strategy and make a decent living at it,” says Agustin Lebron, senior researcher at EquiLibre, a trading firm.

Part of the reason: It takes a while for corporate and other information to spread to various investors, so they slowly build positions, producing buying momentum.

“A huge pension fund can’t flip around its positions in a day,” says Lebron. “Behavioral biases also account for some of the effect, as well—people tend to sell their winners too early and hold losers too long.”

Fans of the strategy point to the human tendency to extrapolate from past results—and chase investment returns—noting that momentum patterns have been evident in markets for decades, even centuries. They also say that some of the worst months for momentum strategies are during longer periods of outperformance.

Some have been doing the trade by buying the strongest investments in a sector while shorting the weakest; others lean in to rising markets or asset classes. Still others use a quantitative approach or turn to banks or others who sell ways to make distinct wagers on momentum as a “tradable factor” or a “thematic basket.”

The fans remain believers. “Any strategy has disappointing periods,” says Antti Ilmanen, global co-head of the portfolio solutions group at AQR Capital Management.

The surge in Moderna and other biotech stocks helped crush the momentum trade. These shares were among the most heavily shorted in recent years, but positive news on a cancer vaccine from Moderna and Merck sent those stocks flying, crushing some quant and other hedge funds. Moderna is up around 150% so far this month.

These traders had an especially rough day on Aug. 19, which Goldman Sachs told its clients was the worst day for “systematic long-short managers” in more than two years. About half of the losses were because of momentum trades, the bank said.

Some traders have begun to short, or bet against, the very stocks that propelled the momentum trade earlier this year. Net short positions in futures tied to the Nasdaq-100 index among speculators recently climbed to some of the highest levels of the past two decades, according to data from the Commodity Futures Trading Commission.

The about-face is a sign of how markets have become more treacherous for investors, even as indexes keep climbing. Part of the issue: the recent meltdown of Situational Awareness, a hedge fund that had piled into some of the most popular momentum shares, including chip stocks. After a period of market tumult, Nvidia shares rocketed almost 9% after its earnings, showing how quickly sentiment can shift.

Some investors say the run-up in share prices driving tech stocks higher reminds them at times of the dot-com frenzy decades ago.

Mike Ogborne, the founder of San Francisco-based Ogborne Capital Management, said he has grown more cautious on technology stocks and is keeping more of his portfolio in cash than he typically does.

And he is nervous about the surge in spending by technology giants and quarterly capital expenditures that keep rising.

“It is a little bit like Cinderella and the clock striking midnight. You don’t know when midnight is going to come around,” Ogborne said. “They don’t send a memo around telling you when the capex cycle is over.”

The Australian sharemarket rose during four of five sessions in the week ending 30 October, but the headline gain concealed a sharp divide between recovering miners, rate-sensitive property stocks and retailers hit by inflation and weaker trading updates.

The Australian sharemarket finished October with a positive week, although the route higher was anything but uniform.

The S&P/ASX 200 closed Friday 30 October at 8,908.1, gaining 112.9 points, or 1.28 per cent, from the previous Friday’s close of 8,795.2.

The All Ordinaries advanced 1.34 per cent to 9,025, while the more concentrated S&P/ASX 20 gained 1.11 per cent.

The benchmark rose during four of the week’s five sessions. It added 0.17 per cent on Monday and 0.46 per cent on Tuesday, before slipping 0.03 per cent on Wednesday. It recovered 0.50 per cent on Thursday and gained another 0.18 per cent on Friday.

The index briefly reached 8,933.3 but again failed to establish itself above the psychologically important 9,000-point mark.

The week’s central tension was between a resources recovery and a less forgiving domestic interest-rate outlook.

Materials gained 4.06 per cent, reclaiming part of the previous week’s heavy fall. Australian real estate investment trusts rose 3.77 per cent, financials gained 1.05 per cent and energy advanced 1.39 per cent.

At the other end of the market, consumer staples fell 5.13 per cent and consumer discretionary shares lost 2.35 per cent. Utilities declined 0.73 per cent and communication services eased 0.68 per cent.

Inflation changes the conversation

Australia’s September inflation data was the week’s pivotal domestic release.

Annual inflation of 4.3 per cent pushed market pricing towards another possible Reserve Bank increase and disrupted Wednesday’s early sharemarket rally.

By Thursday’s close, one widely followed market measure placed the probability of an increase in the cash rate to 4.85 per cent at approximately 80 per cent.

That pricing does not make an increase certain. It does, however, change the framework through which investors assess Australian businesses.

Companies dependent on discretionary household spending face renewed pressure on sales and margins. Property trusts, banks, developers and highly leveraged companies must be considered against the prospect of higher funding costs.

Banks present a more complicated equation. Higher rates can support margins, but they may also slow credit growth and increase arrears.

Miners recover

BHP gained 4.56 per cent across the week to close at $57.56, making a substantial contribution to the benchmark’s rise.

The recovery followed an 8.3 per cent fall during the previous week and helped lift the broader materials sector.

Northern Star Resources added 4.59 per cent, while Goodman Group advanced 6.85 per cent to become the strongest performer in the ASX 20.

The commodities picture was mixed. Gold fell approximately 3.12 per cent on the cited weekly measure, while Brent crude added around 0.68 per cent.

The Australian dollar was little changed at approximately US70.35 cents at the reference point.

Supermarkets and consumer shares retreat

The consumer-staples story was markedly weaker.

Coles fell 11.77 per cent after its first-quarter update, making it one of the largest significant-company declines of the week.

Woolworths lost 3.66 per cent and Wesfarmers fell 4.48 per cent to $76.69 as investors processed company trading commentary against the prospect of another squeeze on household demand.

The moves illustrate how quickly expectations can change when an apparently defensive company disappoints.

Supermarkets still benefit from the recurring need for groceries, but customers can trade down, shift between chains and reduce spending on higher-margin discretionary lines.

Wesfarmers carries exposure to several consumer categories through businesses including Bunnings, Kmart and Officeworks. A renewed rate increase would place more pressure on households already confronting higher prices.

The wider market’s biggest movements

Among companies outside the ASX 20, Mesoblast surged 27.32 per cent, SiteMinder gained 22.74 per cent and Zip rose 22.60 per cent.

The sharpest weekly falls included 4DMedical, down 33.51 per cent; Tuas, down 29.95 per cent; Catalyst Metals, down 17.47 per cent; and Champion Iron, down 13.35 per cent.

Those percentages require context.

The movements in BHP, Commonwealth Bank and other very large companies had substantially more influence on the index than similarly dramatic changes among smaller companies.

A 20 per cent move in a relatively small stock may attract more attention than a two per cent rise in a major bank, but the bank can have the greater effect on the market.

How the ASX 20 moved

The following list uses the S&P/ASX 20 constituents and five-session movements reported at the 30 October close.

Where the component feed did not publish a valid five-day comparison, no figure has been estimated.

BHP Group: Up 4.56 per cent

Commonwealth Bank: Up 1.66 per cent

Rio Tinto: Down 2.20 per cent

National Australia Bank: Up 0.48 per cent

Westpac: Up 0.08 per cent

ANZ Group: Up 1.92 per cent

CSL: Up 2.05 per cent

Macquarie Group: Up 2.19 per cent

Wesfarmers: Down 4.48 per cent

Woodside Energy: Up 1.43 per cent

Goodman Group: Up 6.85 per cent

Telstra: Five-day comparison unavailable from the cited component feed

Woolworths: Down 3.66 per cent

Fortescue: Five-day comparison unavailable from the cited component feed

Transurban: Down 2.40 per cent

QBE Insurance: Down 1.21 per cent

Aristocrat Leisure: Up 0.63 per cent

Northern Star Resources: Up 4.59 per cent

Sigma Healthcare: Down 0.36 per cent

Brambles: Down 1.20 per cent

The companies dominating the conversation

Coles was the week’s standout media-facing company for the wrong reason.

Its trading update produced an outsized repricing and drew attention across the grocery and retail sectors. Woolworths and Wesfarmers were also scrutinised as investors considered how stubborn inflation and another possible rate rise could affect sales volumes.

Bank of Queensland offered a more positive corporate signal.

The bank reported that its FY26 net interest margin had risen six basis points to 1.70 per cent, ahead of the 1.68 per cent expected by the market according to contemporaneous reporting.

Bank of Queensland shares rose 5.8 per cent on Thursday, while the major banks also rallied.

Endeavour Group finished Friday at $3.39, up 4.31 per cent on the day, and released the results of its annual general meeting.

The movement was notable during a week in which investors were highly sensitive to consumer-facing companies. The AGM result should not, however, be presented as the sole cause of the share-price increase without further supporting company guidance.

Mesoblast’s 23.4 per cent Thursday rise and 27.32 per cent weekly gain returned the biotechnology company to the centre of market attention.

For editors, it is important to separate the size of that percentage movement from its influence on the index. Mesoblast was an eye-catching performer, but it did not drive the ASX 200 in the way BHP or Commonwealth Bank did.

Qantas remained part of the broader market conversation as investors watched travel demand and company updates.

However, the primary-source review did not locate a fresh Qantas announcement that justified attributing a major weekly market movement to new company information. The airline should therefore remain on the monitoring list rather than being forced into the week’s causal narrative.

Is Australia’s IPO market reopening?

The official ASX new-listings pipeline remains active but selective.

ASX’s upcoming-floats page included formal applications with offer timetables extending through October and at least one anticipated listing on 30 November.

The exchange notes that its page covers companies for which a formal listing application has been received. It does not represent every company privately exploring a float.

The wider debate concerns whether Australia’s public market is sufficiently competitive when high-growth businesses can pursue capital in the United States or remain privately funded for longer.

ASX has previously raised possible reforms designed to improve the attractiveness of the local market. These include debate about reducing minimum free-float requirements and streamlining aspects of the admissions process.

An enhanced fast-track pathway for qualifying applicants can shorten the review process, reducing the execution risk created when market conditions change during a long IPO timetable.

That does not remove the more fundamental challenge.

New floats still require credible earnings or a convincing growth pathway, sensible pricing and enough genuine free float to support trading after listing.

Investors can already obtain diversified exposure through low-cost exchange-traded funds or buy established, liquid businesses. A float must therefore offer more than novelty.

The current pipeline suggests that the IPO window is open, but it is not indiscriminate.

What investors will watch next

The Reserve Bank’s next decision now sits at the centre of the domestic outlook.

Any change in cash-rate expectations will flow rapidly through banks, retailers, property trusts, listed developers and companies carrying substantial debt.

Investors will also watch whether the materials recovery can continue, whether BHP can hold its rebound and whether consumer companies provide further evidence of slowing demand.

Overseas, technology-sector volatility, commodity prices and the United States interest-rate outlook will continue to shape Australian trading.

The week’s 1.28 per cent headline gain was encouraging, but it was not a broad declaration of confidence.

It was a rotation towards miners, selected financials and property securities—and away from consumer businesses facing a more difficult inflation and interest-rate equation.

Market dashboard

S&P/ASX 200: 8,908.1, up 1.28 per cent for the week

All Ordinaries: 9,025, up 1.34 per cent

S&P/ASX 20: 5,214.7, up 1.11 per cent over five sessions

Best sector: Materials, up 4.06 per cent

Next-best sector: A-REITs, up 3.77 per cent

Weakest sector: Consumer staples, down 5.13 per cent

Major large-cap winner: Goodman Group, up 6.85 per cent

Major large-cap loser: Coles, down 11.77 per cent

AUD/USD: Approximately US70.35 cents at the weekly reference point

Gold: Approximately US$3,885 an ounce, down 3.12 per cent on the cited weekly measure

Brent crude: Approximately US$117.70 a barrel, up 0.68 per cent on the cited weekly measure