Value
5.1/10data confidence 67%| Component | Sub-score |
|---|---|
| P/S | 4.5 |
| Fwd P/E | 1.5 |
| PEG | 10.0 |
| Analyst target | 5.0 |
- ▸Forward P/E: 68.3x
- ▸PEG: 0.40
AMBA · Why this verdict
Why Ambarella (AMBA) is rated SELL
Updated
Model-generated analysis — not investment advice. Not a registered investment advisor. Past performance does not guarantee future results.
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VerdictSELL
Overall score5.6/10
ConfidenceMEDIUM
MacroNEUTRAL
Thesis pillars
| Pillar | Expectation | Trend |
|---|---|---|
A single distributor accounts for 70% of revenues while the top ten end customers collectively represent 67% of revenue — an extreme concentration that makes the business vulnerable to disruption from any single relationship change, pricing renegotiation, or customer loss. Bear case | The single largest customer or distributor falls below 50% of annual revenue per formal disclosure, demonstrating meaningful diversification. | →Stable |
| CounterAnalyst consensus implies roughly 34% upside to price targets, suggesting the market treats the concentration as a manageable rather than fatal risk; if the distributor relationship is governed by long-term commitments, near-term cash flow impact may be limited. | ||
The business quality score of 3.8 falls below the minimum floor of 4.0, driven by near-zero return on equity and negligible operating margins — a shortfall that indicates the business is not yet generating adequate returns on the capital it employs. Warnings | Operating margin rises above 0% for 2 consecutive quarters, removing the principal driver of the quality shortfall. | →Stable |
| CounterThe company generates positive free cash flow at a 12% margin and carries a current ratio well above 1.0, suggesting the business is not in financial distress — the quality shortfall may reflect a transitional investment phase rather than a structural impairment. | ||
The stock currently trades below its 200-day moving average; however, the moving average itself is still rising at roughly 2% per month, suggesting this may be a pullback within a longer-term uptrend rather than a confirmed trend reversal. Momentum breakdown | Price crosses back above the 200-day moving average and stays above it for more than 20 consecutive trading days, confirming the uptrend has resumed. | →Stable |
| CounterThe momentum gate failed alongside the below-average price position, and a flat MACD adds uncertainty — what looks like a pullback in an uptrend can transition into a sustained downtrend without additional confirmation. | ||
Three consecutive quarterly beats — including a 177% upside surprise in August 2025 and further beats of 29.6% and 26.7% in the following two quarters — were followed by an in-line quarter in the most recent report; the underlying delivery record supports analyst optimism for future outperformance. Earnings | EPS beats analyst estimates in at least 3 of the next 4 reported quarters, re-establishing the beat pattern. | →Stable |
| CounterThe most recent quarter only matched estimates rather than beating them, and with quality below the minimum threshold and extreme customer concentration, sustaining a beat streak carries higher operational risk than the historical record alone suggests. | ||
A single distributor accounts for 70% of revenues while the top ten end customers collectively represent 67% of revenue — an extreme concentration that makes the business vulnerable to disruption from any single relationship change, pricing renegotiation, or customer loss.
→StableBear case
- Expectation
- The single largest customer or distributor falls below 50% of annual revenue per formal disclosure, demonstrating meaningful diversification.
CounterAnalyst consensus implies roughly 34% upside to price targets, suggesting the market treats the concentration as a manageable rather than fatal risk; if the distributor relationship is governed by long-term commitments, near-term cash flow impact may be limited.
The business quality score of 3.8 falls below the minimum floor of 4.0, driven by near-zero return on equity and negligible operating margins — a shortfall that indicates the business is not yet generating adequate returns on the capital it employs.
→StableWarnings
- Expectation
- Operating margin rises above 0% for 2 consecutive quarters, removing the principal driver of the quality shortfall.
CounterThe company generates positive free cash flow at a 12% margin and carries a current ratio well above 1.0, suggesting the business is not in financial distress — the quality shortfall may reflect a transitional investment phase rather than a structural impairment.
The stock currently trades below its 200-day moving average; however, the moving average itself is still rising at roughly 2% per month, suggesting this may be a pullback within a longer-term uptrend rather than a confirmed trend reversal.
→StableMomentum breakdown
- Expectation
- Price crosses back above the 200-day moving average and stays above it for more than 20 consecutive trading days, confirming the uptrend has resumed.
CounterThe momentum gate failed alongside the below-average price position, and a flat MACD adds uncertainty — what looks like a pullback in an uptrend can transition into a sustained downtrend without additional confirmation.
Three consecutive quarterly beats — including a 177% upside surprise in August 2025 and further beats of 29.6% and 26.7% in the following two quarters — were followed by an in-line quarter in the most recent report; the underlying delivery record supports analyst optimism for future outperformance.
→StableEarnings
- Expectation
- EPS beats analyst estimates in at least 3 of the next 4 reported quarters, re-establishing the beat pattern.
CounterThe most recent quarter only matched estimates rather than beating them, and with quality below the minimum threshold and extreme customer concentration, sustaining a beat streak carries higher operational risk than the historical record alone suggests.
TrendMatrix Research · core thesis
Engine thesis — one sentence
Ambarella shows 16% upside to the analyst-based price target with a 2.3-to-1 risk/reward ratio, but extreme single-distributor concentration at 70% of revenues and a business quality score below the minimum threshold create risks that outweigh the apparent setup attractiveness — existing positions warrant exit rather than addition.
Falsifiable statement — pillar-level invalidators below. Engine-derived; not personalized advice.
Per-dimension breakdown
Quality
3.8/10data confidence 100%| Component | Sub-score |
|---|---|
| ROE | 0.0 |
| ROA | 0.0 |
| Gross margin | 7.8 |
| Op margin | 0.0 |
| Net margin | 0.0 |
| Current ratio | 8.3 |
| FCF quality | 5.3 |
| Moat | 5.8 |
| Piotroski F | 6.7 |
- ▸FCF-positive but moderate margins (FCF margin 12%, FCF yield 1.4%)
Growth
8.3/10data confidence 67%| Component | Sub-score |
|---|---|
| Rev growth | 6.7 |
| EPS growth | 10.0 |
Momentum
7.6/10data confidence 100%| Component | Sub-score |
|---|---|
| RSI | 5.5 |
| MACD | 10.0 |
| OBV | 10.0 |
| MA position | 9.0 |
| Volume | 3.6 |
- ▸Volume accumulation (rising OBV)
- ▸Above 200-day MA
Sentiment
7.0/10data confidence 100%| Component | Sub-score |
|---|---|
| LLM sentiment | 6.5 |
| Analyst rating | 7.0 |
| Price target | 7.6 |
Insider
3.4/10data confidence 75%| Component | Sub-score |
|---|---|
| materiality | 3.0 |
| insider conviction | 2.0 |
| holder change | 5.1 |
- ▸Notable insider selling — $4,873,548 (0.142% of mkt cap)
Peer rank
4.3/10data confidence 80%| Component | Sub-score |
|---|---|
| value rank | 4.4 |
| quality rank | 0.6 |
| growth rank | 6.0 |
Technical
3.9/10data confidence 100%| Component | Sub-score |
|---|---|
| bollinger | 1.7 |
| support resistance | 4.2 |
| 52w position | 6.5 |
| gap | 3.0 |
- ▸Extreme gap up (6.1%) - may pull back
Risk (lower is worse)
4.0/10data confidence 100%| Component | Sub-score |
|---|---|
| short interest | 6.0 |
| days to cover | 9.3 |
| volatility | 0.0 |
| put call | 4.9 |
| implied vol | 0.0 |
| beta | 3.0 |
| debt equity | 2.8 |
| news risk | 6.0 |
- ▸High IV: 100%
- ▸Concentration risks: 3 HIGH (10-K Item 1A — sized via position_sizing, validated via buy_confidence)
Catalyst
7.3/10data confidence 100%| Component | Sub-score |
|---|---|
| erm | 3.5 |
| earnings history | 10.0 |
| earnings timing | 5.0 |
| surprise avg | 10.0 |
| news activity | 8.0 |
- ▸Strong earnings: 3B/0M
How the verdict was assembled
Engine trigger
Quality below minimum threshold.
Engine technical detail
verdict_path:
L1:HARD_BLOCKPassed (7)
- MOMENTUM:7.6>=5.5
- INSIDER:OK
- 8K:CLEAN
- NEWS_EVENTS:NONE_RECENT
- EARNINGS_PROXIMITY:53d clear
- SEMI_CYCLE_PEAK:CLEAR
- MATERIALS_CYCLE_PEAK:CLEAR
Failed (1)
- ASYMMETRY:0.2<1.5@spot
Warning (0)
none
Reward-to-Risk
0.24
Upside
+3.7%
Downside
15.0%
Sizing output
AVOID
SetupBreakout — Golden cross, above all MAs, RSI 60, MACD bullish
EdgeNo clear edge — No clear edge identified
SuitabilityAggressive — Beta 2.11>1.3, MCap $3.4B<$5B
Investment implication
The L1 gate blocked the positive-verdict path: a hard-floor threshold was breached, so dimensional pillars — including Growth at 8.3 could not lift the engine output above the verdict floor. Failed gate signal: ASYMMETRY:0.2<1.5@spot.
The strongest dimensions are Growth at 8.3, Momentum at 7.6, and Catalyst at 7.3; the weakest are Insider at 3.4, Quality at 3.8, and Technical at 3.9. The V9 engine flagged 1 failed gate, producing an asymmetric reward-to-risk of 0.24 and an engine sizing output of AVOID.
What would invalidate the thesis
Falsifying conditions — when triggered, the corresponding pillar's thesis is invalidated.
- P1Severe Customer Concentration
Trip ifSingle largest customer or distributor falls below 50% of total annual revenues per formal disclosure.
- P2Quality Below Minimum Threshold
Trip ifOperating margin rises above 0% for 2 consecutive quarters.
- P3Price Below Trend Line
Trip ifPrice stays above the 200-day moving average for more than 20 consecutive trading days.
- P4Strong Earnings Beat Record
Trip ifEPS surprise falls below 0% for 2 consecutive quarters.