Our technical scanner runs daily across the S&P 500 and Nasdaq 100, evaluating dozens of indicators — from moving averages and momentum oscillators to volume trends and candlestick patterns — to identify stocks sending the strongest directional signals. Today, 21 October 2026, we turn our attention to the bearish side of the ledger. Short candidates are stocks where the weight of technical evidence suggests continued downside pressure; they are not predictions, but starting points for further research.
Important risk warning: Shorting a stock involves borrowing shares and selling them in the hope of buying them back at a lower price. Unlike buying a stock, where losses are capped at your initial outlay, short positions carry theoretically unlimited loss potential if the stock rises. Short selling also incurs borrowing costs and is subject to margin calls. Always manage position sizes carefully and consider stop-loss levels before initiating any short trade.
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 list with 13 sell signals against just 3 bull signals, and its price action is reinforcing that picture. The stock shed nearly 4% in today’s session alone, extending a pattern of underperformance relative to the broader market that has been evident across multiple recent sessions. An earlier Jefferies downgrade from Buy to Hold, issued in mid-2026, flagged a reassessment of the stock’s near-term prospects, and the shares have struggled to shake that overhang.
On the news front, there is a degree of contradiction that warrants attention. Leidos recently secured fresh government contracts — including a $56 million award from the Naval Health Research Center — which on the surface represents solid business momentum for this defence and technology services company. Several commentators have also argued the stock looks undervalued relative to its contract pipeline. However, the market has so far declined to reward these positives, with the shares repeatedly closing below the index on down days.
From a purely technical standpoint, the preponderance of sell signals relative to the handful of bull signals suggests the path of least resistance remains downward. Investors considering a short position should bear in mind that defence contractors can re-rate quickly on unexpected contract awards or geopolitical developments, both of which represent meaningful upside risks to any bearish thesis.
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 matched Leidos on bear signal count at 13, but its intraday loss of more than 5% makes it the hardest-hit name on today’s list by price movement. The advertising and communications giant is navigating a complex post-merger landscape following the completion of its acquisition of Interpublic Group earlier in 2025, after clearing FTC antitrust scrutiny. Large integrations of this kind frequently weigh on near-term profitability and operational focus, and the market appears to be pricing in some caution around execution.
Analyst sentiment has also drifted in a mildly negative direction. Barclays trimmed its price target earlier this month while maintaining an Equal Weight rating — a modest revision, but one that signals reduced conviction in a near-term re-rating. With third-quarter 2026 earnings scheduled for release on 22 October, the session ahead carries event risk in both directions. A results miss or cautious guidance could accelerate the technical breakdown already underway; an upside surprise, however, could squeeze any short position sharply.
The 13 bear signals versus 6 bull signals reflect a clear technical tilt to the downside, but the proximity of an earnings announcement makes this a particularly high-risk short-selling candidate. Traders should factor in the potential for significant overnight volatility and size positions accordingly.
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 as the most dramatic mover on today’s list, with a single-session decline of more than 9% — a sharp sell-off even by the standards of high-beta technology names. The immediate catalyst appears to be a CISA advisory flagging critical vulnerabilities in the company’s PAN-OS platform. For a cybersecurity firm, a publicised security flaw in its own infrastructure is a reputational as well as a technical concern, and the market’s reaction reflects that sensitivity.
The bearish technical setup — 13 sell signals, only 3 bull signals — had been building prior to today’s drop. The stock had already shown a pattern of institutional profit-taking and valuation resistance across several sessions in September and October, with analysts noting friction between lofty growth expectations and current pricing. That said, the longer-term analyst community remains broadly constructive: Citigroup lifted its target to $440 as recently as mid-October, highlighting the fundamental divergence from the technical picture.
That divergence is itself a risk factor for short sellers. PANW operates in a structurally growing sector, commands premium valuation multiples for a reason, and could recover quickly if the PAN-OS vulnerability is resolved swiftly and without material customer impact. The large single-day decline also raises the prospect of a technical bounce in the near term. Short positions here carry above-average risk given the stock’s historical volatility and the strength of its long-term institutional following.
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 bear signals and just 3 bull signals, having endured a prolonged period of price weakness. The design and engineering software provider has shed approximately a quarter of its value over the past year — a significant drawdown for a company that many consider the dominant platform in its vertical. The rot set in following full-year earnings guidance issued in late August, where the adjusted earnings midpoint fell short of analyst expectations and triggered a sharp sell-off.
Since then, the narrative has been one of gradual stabilisation punctuated by further slippage. Recent commentary from some analysts frames the current price as an attractive entry point for long-term investors, pointing to strong free cash flow generation, margin expansion potential, and incremental growth from acquisitions such as MaintainX. However, the market has yet to act on that thesis with any sustained conviction, and today’s further decline of 2.4% suggests sellers remain in control in the short term.
Technically, the stock has now lost roughly 23% from its late-August peak, a trajectory that tends to attract momentum-driven short sellers even as value investors begin to circle. For those considering a short position, the key risk is a mean-reversion rally driven by improving sentiment around software sector earnings more broadly, or a positive analyst revision cycle that catches the stock’s depressed valuation.
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 today’s list with 12 sell signals and 6 bull signals — the most balanced bear-to-bull ratio in the group, though still clearly skewed to the downside. The beverage alcohol company, best known for its Corona and Modelo beer portfolio in the United States, has been a consistent underperformer within the consumer defensive sector over the past year, a period during which the sector itself has faced headwinds from shifting consumer spending patterns and volume pressure in premium beer categories.
The stock has attracted commentary questioning whether it is undervalued, with at least one analyst fair value estimate placing intrinsic worth well above the current trading price. Free cash flow generation has remained a relative bright spot, and the company’s dominant position in the imported beer segment provides a degree of brand durability. However, weaker sales volumes and a CEO transition have complicated the investment narrative and appeared to weigh on sentiment.
Today’s decline was the most modest in percentage terms among our five candidates, at just under 1%, which may indicate that the selling pressure is more gradual and trend-driven than event-driven. That can actually make for a more technically reliable short setup — but the 6 bull signals serve as a reminder that not all indicators are aligned bearishly. Potential short sellers should also note that consumer staples names can attract defensive buying in risk-off environments, providing a natural cushion against sharp further declines.
Disclaimer: The content in this post is produced for informational and educational purposes only and does not constitute investment advice or a recommendation to buy or sell any security. Technical analysis identifies patterns in historical price data and does not guarantee future performance. Short selling involves significant risks, including unlimited potential losses, margin requirements and borrowing costs. 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 hold no responsibility for any trading losses incurred as a result of acting on the information presented here.