Our technical scanner continuously monitors the S&P 500 and Nasdaq 100, flagging stocks where multiple independent indicators are aligned to the downside. On 15 September 2026, the following five names generated the highest concentration of bearish technical signals, making them potential short candidates worth placing on your watchlist. A high bear-signal count does not guarantee a decline, but it does suggest the path of least resistance may be lower.
Important risk warning: Short selling involves risks that go well beyond those of a conventional long position. Losses on a short trade are theoretically unlimited, margin requirements can be called at any time, and a sudden positive catalyst can trigger sharp short squeezes. Never short a stock without a clearly defined risk-management plan, and consider position sizing carefully.
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 leaderboard with 13 sell signals against only 3 bull signals, accompanied by a nearly 4% drop in a single session. The technical picture is notably weak despite a business backdrop that has its bright spots. The defence and technology contractor posted record quarterly revenue of $4.56 billion in its most recent results, a 7% year-on-year increase, and subsequently raised its full-year outlook — a combination that briefly sent the shares up double digits in August.
Yet the stock has struggled to hold those post-earnings gains, and Jefferies trimmed its price target in July, suggesting that even supportive analysts see limited near-term upside at current levels. Meanwhile, new initiatives — including the Parcata AI-driven defence platform launched in partnership with DHL, and a federal AI data partnership with The Modern Data Company — are strategically interesting but unlikely to move the near-term earnings needle in a meaningful way.
From a technical perspective, the sheer weight of 13 bearish signals relative to just 3 bullish ones suggests that momentum has turned decisively negative. Traders monitoring this name should watch for any failed rally attempts at former support levels, which may now act as resistance. As always, the fundamental strength of the business means that an unexpected contract win or guidance upgrade could reverse the technical trend rapidly.
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 matches Leidos with 13 bearish technical signals, but its steeper intraday decline of just over 5% gives it added prominence on today’s watchlist. The global advertising giant has delivered a respectable five-year total return of around 38%, yet recent commentary from analysts suggests the stock may be running out of steam at current valuations — one note describing it as looking stretched after that run.
The company has been pursuing an AI-driven transformation of its service offering, positioning itself as a technology-forward marketing group. While this strategic pivot is credible, Omnicom has nonetheless underperformed the broader communications services sector over the past year, which raises questions about whether the market is giving the AI narrative enough credit — or too much. The group’s return on equity of approximately 27% is impressive on paper but is notably debt-driven, which adds a layer of financial risk that bears watching in a higher-for-longer rate environment.
Technically, the 6 bullish signals are outnumbered more than two-to-one by bearish ones, and the 5% single-day drop suggests sellers are in control in the short term. Potential short sellers should remain alert to any news around client wins, merger activity, or sector-wide advertising spend data that could provide a sharp catalyst in either direction.
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 is arguably the most eye-catching entry on today’s list. Despite registering 13 bearish technical signals against only 3 bullish ones, the stock’s recent price action has been highly erratic — a sharp 13% single-day surge on 14 September, followed by a nearly 9.3% reversal on 15 September. That kind of violent two-day swing is itself a warning sign of elevated volatility and uncertain price discovery.
The cybersecurity sector rallied strongly on 14 September as AI-related stocks sold off, with investors apparently rotating into security names on the thesis that an AI safety debate would accelerate enterprise spending on cybersecurity infrastructure. Palo Alto was a direct beneficiary of that narrative. However, one widely followed valuation tool flagged the stock as significantly overvalued following that surge, and the subsequent reversal suggests that at least some of that enthusiasm was short-lived.
The fundamental picture remains broadly positive — Palo Alto continues to be a leading platform in enterprise cybersecurity — but a premium valuation combined with sharp technical deterioration and only 3 bullish signals makes this a name worth monitoring closely on the short side. The high daily volatility means that risk management is especially critical here; stops can be triggered rapidly in either direction.
4. Autodesk (ADSK) – 12 technical sell signals
Price: $241.73 | Daily change: -2.41%
View the full technical analysis of Autodesk
Autodesk enters the list with 12 bearish technical signals and just 3 bullish ones, despite some genuinely encouraging underlying business trends. The design-software company beat revenue expectations in its most recent quarterly report and delivered stronger-than-expected cloud sales growth. However, management’s conservative forward cost guidance — partly reflecting the financial drag from its MaintainX acquisition — appears to have dampened investor enthusiasm and weighed on the share price.
The pattern over recent weeks has been consistent: brief rallies driven by broader market moves quickly give way to renewed selling pressure. An 8% decline on 4 September, followed by a near-8% recovery on 8 September, reflects the same theme seen in Palo Alto — wide intraday swings that make directional positioning challenging. Trading volumes have at times been well below average, which can amplify price moves and reduce the reliability of short-term signals.
Autodesk has also notably underperformed the Dow Jones index over the past year, even as analysts remain broadly constructive on the longer-term story. That divergence between analyst optimism and actual price performance is a flag worth noting. For short-side traders, the 12-to-3 bear-to-bull signal ratio and persistent relative underperformance are the key data points, though the thin volumes warrant additional caution around entry and exit execution.
5. Constellation Brands (STZ) – 12 technical sell signals
Price: $129.35 | Daily change: -0.98%
View the full technical analysis of Constellation Brands
Rounding out our list is Constellation Brands, the beer and spirits group best known for its Mexican beer portfolio in the United States. With 12 bearish technical signals versus 6 bullish ones, the ratio is less lopsided than the names above, but the persistent downward price action is notable. One data point that stands out: the stock recorded losses in nine of the ten most recent trading sessions prior to the dates covered in our news feed — a clear sign of sustained selling pressure.
Operationally, the company is in a strategic refinement phase, sharpening its focus on specific consumer occasions and implementing brand-level growth playbooks. Management reaffirmed its full-year outlook in mid-September, which provides some fundamental support. Nevertheless, the stock has underperformed the broader consumer defensive sector over the past year, a sector that is typically expected to hold its ground in uncertain markets.
An interesting counter-argument for bears is the valuation picture: one prominent valuation model flagged Constellation Brands as looking materially undervalued on a fundamental basis in early September. This is a meaningful risk for short sellers — a stock that is both technically weak and fundamentally cheap can attract value-oriented buyers who may arrest the decline. Position sizing and disciplined stop management are especially important in this scenario.
Disclaimer: This article is produced for informational and educational purposes only and does not constitute investment advice or a solicitation to buy or sell any security. Technical analysis identifies patterns in historical price data and does not predict future performance. Short selling involves significant risks, including unlimited potential losses, and is not suitable for all investors. Always conduct your own due diligence and consult a qualified financial adviser before making any investment decisions. The Wall Street Stock Investors Club and its contributors may hold positions in securities mentioned.