PRTA Stock Analysis: Buy, Sell, or Hold?
PRTA - Prothena Corporation plc Ordinary Shares
$8.93
-0.09 (-1.00%)
▼
5d:
-6.98%
30d:
-3.56%
90d:
+8.11%
HOLD
MODERATE Confidence
Analysis Updated: Sep 11, 2026 12:00 AM ET
Earnings: Nov 05, 2026
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Interactive Price Chart (1 Month)
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Bottom Line:
📊 HOLD: PRTA shows mixed signals. Fine to hold existing positions. Not urgent to buy or sell.
📊 HOLD: PRTA shows mixed signals. Fine to hold existing positions. Not urgent to buy or sell.
In-depth Analysis How we analyze
Valuation Analysis: PRTA is currently trading at $8.93, which is considered slightly low relative to its 30-day fair value range of $8.86 to $9.52. From a valuation perspective, the stock is trading at a discount (Forward PE: -5.9) compared to its historical average (18.0). At these levels, the market is pricing in 0% annual earnings growth. This growth rate appears achievable given the company's track record, suggesting the valuation is rational.
Technical Outlook: Technically, PRTA is in a strong uptrend. The price is currently testing key support at $8.77. A bounce from this level would confirm strength, while a break below could signal further downside.
Market Sentiment: The stock scores a mixed 41/100 on our bottoming-setup gauge, with only partial signs of a stabilized entry point. In the options market, Implied Volatility is low (0th percentile), suggesting options premiums are relatively cheap. This makes it an attractive time for long options strategies if you have a directional bias. Wall Street analysts see significant upside, with an average price target of $21.40 (+139.6%). The stock is fairly positioned - fine to hold existing positions or accumulate slowly on dips, but not an urgent buy.
Technical Outlook: Technically, PRTA is in a strong uptrend. The price is currently testing key support at $8.77. A bounce from this level would confirm strength, while a break below could signal further downside.
Market Sentiment: The stock scores a mixed 41/100 on our bottoming-setup gauge, with only partial signs of a stabilized entry point. In the options market, Implied Volatility is low (0th percentile), suggesting options premiums are relatively cheap. This makes it an attractive time for long options strategies if you have a directional bias. Wall Street analysts see significant upside, with an average price target of $21.40 (+139.6%). The stock is fairly positioned - fine to hold existing positions or accumulate slowly on dips, but not an urgent buy.
Quick Decision Summary
Current Position
SLIGHTLY LOW
Historical Trading Range
$8.86 -
$9.52
Company Quality Score
56/100
(HOLD)
Volume Confirmation
HIGH
Confidence Score
87.3%
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View Profit Protection PlanAll Signals
- BULLISH: Price oversold vs 30-day range
- BULLISH: Options cheap (IV 0th percentile)
- NEUTRAL: Mixed technical signals (41/100)
- BULLISH: High volume confirmation
- BULLISH: Trading 139.6% below Wall St target ($21.40)
- BULLISH: Market expects only 0% annual growth - appears undervalued
- NEUTRAL: Bottoming setup forming (41/100) — watch for confirmation
- CAUTION: 5-day price weakness (-7.0%) - monitor closely
Trading Range Analysis
30-Day Trading Range
$8.86 -
$9.52
Current vs Trading Range
SLIGHTLY LOW
Expected Move (7 Days)
±$0.93
(10.4%)
Support & Resistance Levels
Support Level
$8.77
Resistance Level
$9.87
Current Trend
Strong Uptrend
Technical data as of
Sep 11, 2026
Fundamental Context
Forward P/E (Next Year Est.)
-5.88
Wall Street Target
$21.40
(+139.6%)
Revenue Growth (YoY)
-77.1%
Profit Margin
-80.7%
PE vs Historical
-5.9 vs 18.0
CHEAP
Share & Embed Analysis
Last updated: September 13, 2026 1:26 PM ET
Data refreshes hourly during market hours. Next update: 2:26 PM
Data refreshes hourly during market hours. Next update: 2:26 PM
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Technical Signals Check
Is PRTA showing a specific setup today?
Insider Activity (6 Months)
0
Buys
0
Sells
0
Net
NEUTRAL
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Advanced PRTA Option Strategies
Professional options setups generated by AI based on today's PRTA price and gamma walls.
