Our technical scanner analyses every stock in the S&P 500 and Nasdaq 100 each trading day, weighing a broad range of indicators to identify names showing the strongest bullish or bearish momentum signals. Below we present the five stocks that registered the highest number of technical sell signals on 8 October 2026. Short candidates are stocks where the weight of technical evidence suggests further downside may be likely — they are not recommendations to sell or short.
Important risk warning: Short selling carries significantly greater risk than buying equities. Losses on a short position are theoretically unlimited, margin requirements add complexity, and stocks can be subject to sharp short squeezes. Always size positions carefully and consult a qualified financial adviser before shorting any security.
1. Leidos (LDOS) – 13 technical sell signals
Price: $133.78 | Daily change: -3.88%
View the full technical analysis of Leidos
Leidos tops today’s bearish scan with 13 sell signals against just 3 bull signals, compounding a day on which the stock fell nearly 4%. The technical picture has been deteriorating for some time: as recently as late September, shares were trading around $123, and even after a partial recovery the stock is now giving back those gains. The broader backdrop is one of persistent underperformance relative to the S&P 500.
On the fundamental side, investor anxiety has centred on the company’s exposure to federal budget pressures and uncertainty surrounding its health segment. A Quiver Quant note from earlier in the month flagged these concerns explicitly as drivers of a 3.5% single-day decline. While insider activity — specifically a stock deferral plan purchase by an executive vice president — could be read as a modest vote of confidence, such transactions are often pre-scheduled and carry limited signal value.
Leidos has also been making management changes, naming a new senior vice president of investor relations and adding an AT&T executive to its board. While these moves may reflect longer-term strategic intent, they do little to address near-term technical weakness. With bear signals significantly outnumbering bull signals, the chart warrants close attention from technically minded investors.
2. Omnicom Group (OMC) – 13 technical sell signals
Price: $81.76 | Daily change: -5.03%
View the full technical analysis of Omnicom Group
Omnicom Group also registers 13 technical sell signals, with a 5% single-day decline making it the worst day-over-day performer on this list. The advertising giant’s technical deterioration is notable because it comes despite what appeared to be a strong second quarter: Q2 adjusted earnings per share rose substantially year on year and revenue surpassed Wall Street expectations by a wide margin, driven in part by the consolidation of Interpublic Group following its acquisition.
Yet the market’s reaction to those results was muted at best. Shares fell sharply in the wake of the earnings release due to concerns about profitability metrics that disappointed relative to some expectations. Analyst sentiment has cooled, with a majority of covering analysts rating the stock a hold and at least some price targets being trimmed. The stock’s valuation has also been flagged as stretched by some commentators, despite solid cash flow generation.
More recently, Omnicom collected several awards at the IPA effectiveness competition, which is a positive signal for its creative credentials and client relationships. However, industry accolades rarely move stock prices in a sustained way. With six bull signals unable to offset thirteen bearish ones, the technical picture remains firmly on the negative side for now.
3. Palo Alto Networks (PANW) – 13 technical sell signals
Price: $328.48 | Daily change: -9.28%
View the full technical analysis of Palo Alto Networks
Palo Alto Networks stands out on this list because its technical sell signals arrive after an extraordinary run: the stock had reportedly gained around 125% in the year to date and was hitting all-time highs as recently as 6 October. A sharp reversal of nearly 9.3% in a single session is therefore particularly striking, and it underscores one of the key risks of shorting a momentum stock — the move against short sellers can be violent before the eventual turn.
The central debate around PANW has been valuation. Even enthusiastic supporters of the company’s cybersecurity platformisation strategy have acknowledged that the shares trade at a significant premium to the broader market. When high-multiple growth stocks reverse from all-time highs, the technical damage can accumulate quickly, and that appears to be what the scanner is capturing today.
It is worth emphasising that Palo Alto Networks remains a highly regarded business in a structurally growing sector, and the broader cybersecurity space saw a sharp sell-off on the day across several names. Prospective short sellers should be aware that a stock with this level of momentum and institutional ownership can recover rapidly. The 13 bear signals versus only 3 bull signals make it technically notable, but the fundamental quality of the business demands extra caution.
4. Autodesk (ADSK) – 12 technical sell signals
Price: $241.73 | Daily change: -2.41%
View the full technical analysis of Autodesk
Autodesk enters the bearish scan with 12 sell signals and only 3 bull signals, the product of a prolonged period of weakness that accelerated following its most recent earnings release. By late September, the stock had declined by roughly 22–23% from its August peak, a sharp drawdown for a software company that had previously enjoyed solid momentum. Multiple commentators noted that the stock was testing levels that invited questions about how much further it could fall.
The earnings-driven sell-off appears to have been the trigger for the technical deterioration. While the company’s longer-term subscription transition and design-software leadership remain broadly intact, the near-term numbers disappointed enough to prompt a significant re-rating. The stock did receive a notable boost in early October when French industrial group Schneider Electric announced a substantial deal that had implications for Autodesk’s addressable market, briefly lifting sentiment.
However, that positive catalyst appears to have faded, and the stock is again trading lower. With 12 bearish signals still firmly in place, technically oriented investors will be watching whether the stock can find a floor near current levels or whether the selling pressure continues. As always, a fundamentally sound business can remain under technical pressure for longer than expected.
5. Constellation Brands (STZ) – 12 technical sell signals
Price: $129.35 | Daily change: -0.98%
View the full technical analysis of Constellation Brands
Constellation Brands rounds out the list with 12 technical sell signals, though it is worth noting that six bull signals also registered — the highest bull count on this list — suggesting the technical picture may be fractionally less one-sided than the other candidates. The stock has had a difficult year, with shares reaching 11-year lows ahead of its second-quarter earnings release on 7 October, prompting at least one market commentator to warn of the risks of trying to catch a falling knife.
Bank of America analysts reduced their price target and reiterated an underperform rating, citing limited evidence that the company’s beer segment turnaround is gaining durable traction. CNBC’s Jim Cramer also weighed in, characterising the stock as having multiple unresolved issues. These are meaningful signals of cautious sentiment from both the sell side and financial media.
On a more positive note, the Q2 results themselves beat both earnings and revenue estimates, and the company made a bolt-on acquisition in the ready-to-drink category. Whether these developments can shift the longer-term narrative remains to be seen. The stock’s modest decline of under 1% on the day suggests the earnings beat provided some support, but 12 bear signals indicate the technical trend has not yet turned. Investors considering a short position here face the additional risk of a potential sentiment reversal if the turnaround story gains credibility.
Disclaimer: This article is provided for informational and educational purposes only and does not constitute investment advice or a recommendation to buy, sell or short any security. Technical signals are historical in nature and do not guarantee future price movements. Short selling involves significant risks, including potentially unlimited losses. Always conduct your own research and consult a qualified financial adviser before making any investment decision. The Wall Street Stock Investors Club and its contributors may or may not hold positions in the securities mentioned.