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.”

Reporting season has once again reminded investors that a strong profit does not guarantee a rising share price, and a large loss does not always trigger a sell-off. What matters most is how each result compares with expectations and, increasingly, what management says about the year ahead. During the August 2026 season, companies offering credible turnarounds or unexpectedly strong guidance were rewarded handsomely, while those flagging weaker margins, slowing demand or greater uncertainty were punished.

The following ranking draws on Morningstar’s review of 164 ASX-listed companies and measures each company’s share-price movement on the day it reported. This captures the market’s immediate response to the earnings announcement, before subsequent economic developments, dividends and company-specific news cloud the picture. Here are the five biggest winners, and the five hardest-hit losers, of the season so far.

The five winners

1. Bapcor (ASX:BAP): +41.0%

Bapcor delivered reporting season’s largest relief rally after presenting early evidence that its troubled automotive-parts business was stabilising. Although underlying revenue fell 1.8% to $1.92 billion and underlying NPAT collapsed 85% to $10.8 million, underlying EBITDA of $152.5 million exceeded guidance.

More importantly, working-capital initiatives released $68.5 million in the second half, lifting cash conversion to 109.4% and reducing net debt by 63% to $135 million. The statutory loss was $431.6 million, largely because of non-cash impairments. Investors focused on improving operational momentum, stronger liquidity and management’s expectation of modest FY27 revenue growth.

2. Zip Co (ASX:ZIP): +18.2%

Zip comfortably surpassed its FY26 targets, sending the buy-now-pay-later provider’s shares sharply higher. Transaction volume rose 23% to $16.7 billion, while cash earnings before tax, depreciation and amortisation jumped 58% to a record $268.9 million. Statutory profit climbed 46% to $116.4 million, and the cash operating margin expanded by 4.2 percentage points to 20%.

The strongest signal was guidance for FY27 cash earnings of $340 million—around 26% growth and above analysts’ forecasts. US transaction volume increased 42.5% and now represents three-quarters of group volume, offsetting weaker customer activity in Australia.

3. CSL (ASX:CSL): +17.3%

CSL’s result was hardly spectacular in isolation, but it cleared a market bar that had fallen dramatically following earlier downgrades and restructuring announcements. Underlying NPATA was US$3.1 billion, down 2% in constant-currency terms, while operating cash flow reached US$3.51 billion.

CSL maintained its full-year dividend at US$2.92 per share and completed a A$1 billion buyback. The real catalyst was FY27 guidance for approximately 5% underlying profit growth, compared with market expectations closer to 2%. After an extended period of earnings disappointments, investors interpreted the outlook as evidence that CSL’s core plasma business was approaching a sustainable recovery.

4. Judo Capital (ASX:JDO): +16.9%

Judo Capital demonstrated strong operating leverage as its specialist business-lending franchise expanded. Full-year profit before tax rose 34% to $168.1 million, while pre-provision profit increased 42%. Gross loans and advances grew 18% to $14.7 billion, reaching the top of the bank’s guidance range and comfortably exceeding broader system growth.

Deposits increased 24% to $12.2 billion, return on equity improved by 1.1 percentage points to 6.4%, and earnings per share rose 29% to 9.9 cents. Reaffirmation of the FY27 outlook gave investors confidence that loan growth could continue without sacrificing margins or credit quality.

5. Super Retail Group (ASX:SUL): +15.8%

The owner of Supercheap Auto, rebel, BCF and Macpac reported record sales of $4.2 billion, up 3.2%, despite cautious discretionary spending. Profitability went backwards: normalised profit before tax fell 7% to $306 million and normalised NPAT declined 2.8% to $226 million as transformation spending weighed on margins. Nevertheless, the result exceeded subdued expectations, online sales grew 5.3% and membership across the group’s loyalty programs reached 13.1 million. Investors were also encouraged by positive early FY27 trading, stable gross margins and continued market-share gains. A fully franked 33-cent final dividend added to the appeal.

The five losers

1. Hansen Technologies (ASX:HSN): –21.2%

Hansen’s historic result met expectations, but investors recoiled from its outlook. The utility and communications software provider achieved an underlying EBITDA margin of 31%, exceeding its 30% target, while generating strong cash flow. However, management designated FY27 an “investment and transition year”, signalling a roughly five-percentage-point margin contraction as spending on products, sales capabilities and organisational changes increased.

Revenue had already been broadly flat, leaving investors concerned that the investment program would depress earnings before new growth appeared. Leadership changes, including the chief executive’s departure, added uncertainty. Management expects revenue growth and margins above 30% to return in FY28, but the market was unwilling to wait.

2. Life360 (ASX:360): –19.4%

Life360’s headline growth was impressive: quarterly revenue rose 38% to US$159 million, subscription revenue increased 31%, and adjusted EBITDA climbed 53% to US$31.1 million. Monthly active users reached 102.4 million and paying circles grew 27% to 3.2 million. The sell-off reflected expectations rather than a collapsing business.

Net income fell 18%, the net margin contracted from 6% to 3%, hardware shipments dropped 18%, and full-year EBITDA guidance was merely maintained. After a strong valuation run, investors wanted a larger upgrade and clearer evidence that heavy investment in advertising, international expansion and artificial intelligence would generate additional earnings.

3. PEXA Group (ASX:PXA): –17.0%

PEXA reported a 7% increase in continuing-operations revenue and 12% EBITDA growth to $152 million, accompanied by a two-percentage-point margin expansion. Free cash flow increased 39%, suggesting the core Australian electronic-conveyancing platform remained highly profitable. Investors instead concentrated on management’s warning that property-transfer volumes could decline, alongside regulatory uncertainty surrounding the fees PEXA can charge.

The company is also continuing to invest heavily in its loss-making international expansion. Morningstar considered the market reaction excessive, arguing that structural transfer-volume assumptions had not materially changed, but the combination of softer near-term activity and regulatory risk overwhelmed the respectable headline numbers.

4. SEEK (ASX:SEK): –14.3%

SEEK produced solid FY26 figures, including 10% revenue growth to $1.20 billion, a 15% rise in EBITDA and 28% growth in adjusted earnings per share. It also lifted its fully franked annual dividend by 13% to a record 52 cents. Those achievements were overshadowed by falling paid job-ad volumes and cautious FY27 assumptions.

The statutory accounts included a $201 million loss from the SEEK Growth Fund and $377 million of significant items, making the headline result considerably less attractive. Investors were particularly concerned that economic weakness could limit volumes while the company continued investing in platform integration and artificial-intelligence products.

5. JB Hi-Fi (ASX:JBH): –12.3%

JB Hi-Fi’s full-year result was broadly respectable, with group sales rising 5% to $11.1 billion and underlying earnings per share increasing 6% to $4.48. The damage came from its current-trading update. Australian sales were almost flat during the June quarter and deteriorated further in July, while earnings in the core Australian electronics business fell 3.6%.

Housing-related categories were particularly weak as higher living costs and interest rates constrained household budgets. With JB Hi-Fi entering the season on a demanding valuation, an in-line historic result was not sufficient: the loss of sales momentum prompted investors to rapidly reduce their expectations for FY27.

Overall, the season showed that share prices react less to whether profits rose or fell than to the gap between results and expectations. Bapcor was rewarded for being less troubled than feared, while several fundamentally profitable companies were punished because their outlooks failed to justify elevated valuations.