GET DAILY SIGNALSCerebras Systems (CBRS) Stock Slides -33% Over 30 Days on OpenAI and Lockup Concerns
Key Takeaways
- Cerebras Systems shares fell roughly 33% over the last 30 days, sliding from about $190 to near $127 and deepening a decline that began shortly after its May 2026 IPO.
- Reports that anchor customer OpenAI used Nvidia hardware for the "Ultrafast" mode of its newest model reignited concerns about Cerebras' heavy customer concentration.
- The expiration of a post-IPO lockup, freeing roughly 19.4 million shares for potential sale, and subsequent insider selling added supply-side pressure.
- Over the trailing quarter the stock has declined approximately 26%, even as the company raised 2026 revenue guidance and carried a large contracted backlog.
- Analyst consensus remains bullish, with an average 12-month price target near $289, though the company is unprofitable and trades at a steep sales multiple.
Understanding Cerebras Systems (CBRS) Business and Position
Cerebras Systems is an artificial intelligence infrastructure company that designs and builds wafer-scale processors and AI computing systems. Unlike conventional GPUs, which are fabricated as many small chips, Cerebras' Wafer-Scale Engine (WSE) is built on a single silicon wafer, a design the company says reduces networking bottlenecks, latency, and power constraints in large AI workloads. The company generates revenue by selling its processors and CS-3 systems and by providing cloud-based access to its hardware for inference tasks.
The company went public on the Nasdaq in May 2026 and is positioned as a differentiated challenger to GPU-centric AI infrastructure. Investors follow the stock closely because of its rapid revenue growth, its multibillion-dollar relationship with OpenAI, and its integration with major cloud platforms, including Amazon's AWS. I also checked this using Tickeron’s AI Screener to see how the stock compares to others in the industry.
Recent Stock Performance: 30 Days and Quarter
Over the last 30 days, CBRS shares declined roughly 33%, falling from a closing price of about $190 in mid-September to approximately $127 on the most recent close. The selloff was not uniform: the stock initially held near $206 to $212 before turning sharply lower in late September and accelerating through October, when it set fresh post-listing lows.
The trailing-quarter picture is also negative, with the stock down roughly 26%. Within that period, shares were volatile, rallying into mid-August before pulling back, staging a partial recovery in September, and then breaking down again. Since its first-day trading peak, the stock has retraced more than half of its value and now trades well below its $185 IPO price.
Drivers Behind the Recent Decline
The primary catalyst was a shift in the company's most important customer relationship. In early October, reports indicated that OpenAI chose NVDA GPUs—rather than Cerebras hardware—to power the "Ultrafast" mode of its GPT-6.1 Sol model. Because a substantial portion of Cerebras' contracted backlog is tied to OpenAI, investors interpreted the move as a possible signal that more inference workloads could migrate to rival hardware, undermining the company's strategic position in that supply chain.
Supply-side dynamics compounded the decline. A post-IPO lockup expiration released roughly 19.4 million shares for potential sale in mid-October, and subsequent insider selling by the CEO and COO added to the overhang. Broader weakness in semiconductor and AI hardware names also contributed, as did a Financial Times report that OpenAI's annualized revenue was lower than some earlier estimates, which raised broader questions about AI demand. Public reassurance from OpenAI's CEO about the partnership briefly lifted the stock before the selling resumed.
Quarterly Performance and Fundamentals
The multi-month trend reflects a market still debating Cerebras' valuation and its dependence on a single anchor customer. The company has delivered strong fundamentals—core revenue grew 76% to $510 million in 2025, management raised full-year 2026 core revenue guidance, and the company reported roughly $25.4 billion in contracted work as of mid-2026. It also announced an agreement to supply AI systems to cloud startup Gimlet Labs and a commitment from Jane Street, steps that could diversify its customer base over time.
At the same time, the company remains unprofitable, carries rising debt and negative equity, and trades at a sales multiple far above the semiconductor average. Those factors left the stock vulnerable to any negative news about its key customers, and the quarterly decline has been driven primarily by repricing risk rather than a deterioration in reported results.
What to Watch Going Forward
Several factors will likely shape CBRS shares in the months ahead. The company's third-quarter 2026 results are a key checkpoint, as they will offer the first indication of whether the reported shift in OpenAI workloads has reached revenue. Gross margins are another focal point—analysts have flagged margin stability as critical to supporting the valuation—along with progress on the AWS integration, which management expects to reach general availability in early 2027.
Investors should also monitor customer diversification through arrangements such as the Gimlet Labs agreement, competitive developments from Nvidia and companies developing in-house chips, and the broader macro environment for AI capital spending. These are observations of risk and opportunity, not investment recommendations, and the stock's elevated valuation and unprofitable profile suggest continued volatility is possible.
Using Tickeron Tools for Ongoing Analysis
In my own work, I frequently review Tickeron’s AI Trading Bots to explore strategy ideas across volatile names like this one. The platform lets users test approaches on thousands of tickers with clear performance metrics, which helps put current price action into a broader context without replacing fundamental review.
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Financial writer and active order flow futures trader with a focus on fundamental analysis, macroeconomic factors, and equity research. I make in-depth blogs on stocks and ETFs, bridging the gap between raw market data and real-world trading decisions.
Momentum Indicator for CBRS turns negative, indicating new downward trend
CBRS saw its Momentum Indicator move below the 0 level on September 30, 2026. This is an indication that the stock could be shifting in to a new downward move. Traders may want to consider selling the stock or exploring put options. Tickeron's A.I.dvisor looked at 8 similar instances where the indicator turned negative. In 8 of the 8 cases, the stock moved further down in the following days. The odds of a decline are at 90%.
Technical Analysis (Indicators)
Bearish Trend Analysis
The Moving Average Convergence Divergence Histogram (MACD) for CBRS turned negative on September 30, 2026. This could be a sign that the stock is set to turn lower in the coming weeks. Traders may want to sell the stock or buy put options. Tickeron's A.I.dvisor looked at 1 similar instances when the indicator turned negative. In 1 of the 1 cases the stock turned lower in the days that followed. This puts the odds of success at 90%.
CBRS moved below its 50-day moving average on September 28, 2026 date and that indicates a change from an upward trend to a downward trend.
Following a 3-day decline, the stock is projected to fall further. Considering past instances where CBRS declined for three days, the price rose further in 50 of 62 cases within the following month. The odds of a continued downward trend are 90%.
The Aroon Indicator for CBRS entered a downward trend on October 13, 2026. This could indicate a strong downward move is ahead for the stock. Traders may want to consider selling the stock or buying put options.
Bullish Trend Analysis
The RSI Indicator shows that the ticker has stayed in the oversold zone for 4 days. The price of this ticker is presumed to bounce back soon, since the longer the ticker stays in the oversold zone, the more promptly an Uptrend is expected.
The Stochastic Oscillator shows that the ticker has stayed in the oversold zone for 11 days. The price of this ticker is presumed to bounce back soon, since the longer the ticker stays in the oversold zone, the more promptly an upward trend is expected.
CBRS may jump back above the lower band and head toward the middle band. Traders may consider buying the stock or exploring call options.
Fundamental Analysis (Ratings)
The Tickeron Valuation Rating of 26 (best 1 - 100 worst) indicates that the company is slightly undervalued in the industry. This rating compares market capitalization estimated by our proprietary formula with the current market capitalization. This rating is based on the following metrics, as compared to industry averages: P/B Ratio (3.301) is normal, around the industry mean (6.294). P/E Ratio (-27.326) is within average values for comparable stocks, (22.044). Projected Growth (PEG Ratio) (0.000) is also within normal values, averaging (3.761). Dividend Yield (0.000) settles around the average of (0.011) among similar stocks. P/S Ratio (63.694) is also within normal values, averaging (45.794).
The Tickeron Price Growth Rating for this company is 79 (best 1 - 100 worst), indicating slightly worse than average price growth. CBRS’s price grows at a lower rate over the last 12 months as compared to S&P 500 index constituents.
The Tickeron SMR rating for this company is 94 (best 1 - 100 worst), indicating weak sales and an unprofitable business model. SMR (Sales, Margin, Return on Equity) rating is based on comparative analysis of weighted Sales, Income Margin and Return on Equity values compared against S&P 500 index constituents. The weighted SMR value is a proprietary formula developed by Tickeron and represents an overall profitability measure for a stock.
The Tickeron PE Growth Rating for this company is 97 (best 1 - 100 worst), pointing to worse than average earnings growth. The PE Growth rating is based on a comparative analysis of stock PE ratio increase over the last 12 months compared against S&P 500 index constituents.
The Tickeron Profit vs. Risk Rating rating for this company is 100 (best 1 - 100 worst), indicating that the returns do not compensate for the risks. CBRS’s unstable profits reported over time resulted in significant Drawdowns within these last five years. A stable profit reduces stock drawdown and volatility. The average Profit vs. Risk Rating rating for the industry is 76, placing this stock worse than average.
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