$8.12
-0.290 (-3.45%)
At Close: Jul 31, 2026
| Range | Low Price | High Price | Comment |
|---|---|---|---|
| 30 days | $8.00 | $10.16 | Friday, 31st Jul 2026 PRTA stock ended at $8.12. This is 3.45% less than the trading day before Thursday, 30th Jul 2026. During the day the stock fluctuated 6.19% from a day low at $8.00 to a day high of $8.49. |
| 90 days | $7.73 | $11.80 | |
| 52 weeks | $6.61 | $11.80 |
Historical Prothena Corporation plc prices
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Jul 31, 2026 | $8.41 | $8.49 | $8.00 | $8.12 | 527 147 |
| Jul 30, 2026 | $8.50 | $8.56 | $8.26 | $8.41 | 495 811 |
| Jul 29, 2026 | $8.64 | $8.68 | $8.39 | $8.56 | 624 386 |
| Jul 28, 2026 | $8.70 | $8.79 | $8.36 | $8.56 | 794 426 |
| Jul 27, 2026 | $8.88 | $9.13 | $8.66 | $8.70 | 688 176 |
| Jul 24, 2026 | $8.59 | $8.83 | $8.43 | $8.75 | 567 503 |
| Jul 23, 2026 | $8.27 | $8.63 | $8.27 | $8.53 | 532 211 |
| Jul 22, 2026 | $8.70 | $8.79 | $8.43 | $8.44 | 529 933 |
| Jul 21, 2026 | $8.64 | $8.81 | $8.51 | $8.75 | 529 571 |
| Jul 20, 2026 | $8.66 | $8.86 | $8.54 | $8.67 | 539 136 |
| Jul 17, 2026 | $8.29 | $8.80 | $8.28 | $8.66 | 392 529 |
| Jul 16, 2026 | $8.37 | $8.66 | $8.08 | $8.47 | 657 371 |
| Jul 15, 2026 | $8.46 | $8.64 | $8.43 | $8.43 | 499 869 |
| Jul 14, 2026 | $8.77 | $8.88 | $8.61 | $8.64 | 515 626 |
| Jul 13, 2026 | $9.14 | $9.15 | $8.76 | $8.83 | 775 155 |
| Jul 10, 2026 | $9.33 | $9.82 | $9.03 | $9.24 | 499 235 |
| Jul 09, 2026 | $9.95 | $10.02 | $9.55 | $9.64 | 477 857 |
| Jul 08, 2026 | $9.71 | $9.86 | $9.55 | $9.85 | 414 780 |
| Jul 07, 2026 | $9.62 | $9.78 | $9.33 | $9.68 | 520 542 |
| Jul 06, 2026 | $9.66 | $9.84 | $9.48 | $9.50 | 397 877 |
| Jul 02, 2026 | $9.58 | $10.16 | $9.57 | $9.69 | 433 235 |
| Jul 01, 2026 | $9.74 | $10.00 | $9.47 | $9.58 | 436 692 |
| Jun 30, 2026 | $9.96 | $10.01 | $9.75 | $9.79 | 327 479 |
| Jun 29, 2026 | $10.06 | $10.11 | $9.78 | $9.97 | 407 042 |
| Jun 26, 2026 | $9.32 | $10.09 | $9.28 | $10.02 | 1 914 400 |
FAQ
What are historical stock prices?
Historical stock prices refer to a stock’s recorded prices at various past points. These prices include several key figures that help investors and analysts evaluate a stock’s performance over time:
Open: Open price for the trading day.
High: Highest price for the trading day.
Low: Lowest price for the trading day.
Close: Close price for the trading day.
Additionally, historical prices often include:
Volume is the number of shares traded during the day. It indicates how actively a stock was traded and can provide insights into market sentiment and liquidity.
Open: Open price for the trading day.
High: Highest price for the trading day.
Low: Lowest price for the trading day.
Close: Close price for the trading day.
Additionally, historical prices often include:
Volume is the number of shares traded during the day. It indicates how actively a stock was traded and can provide insights into market sentiment and liquidity.
How can I use PRTA stock historical prices to predict future price movements?
Trend Analysis: Examine the PRTA stock’s historical trends to identify patterns that might continue.
Moving Averages: Use moving averages to detect potential reversal points.
Momentum Indicators: Apply indicators like RSI or MACD to assess the momentum and strength of price movements.
Volume Analysis: Analyze trading volume alongside price changes to gauge trend strength.
Statistical Methods: Use statistical tools such as regression analysis to model and forecast future prices based on past data.
These techniques can provide insights but should be used with risk management practices to mitigate potential losses.
Moving Averages: Use moving averages to detect potential reversal points.
Momentum Indicators: Apply indicators like RSI or MACD to assess the momentum and strength of price movements.
Volume Analysis: Analyze trading volume alongside price changes to gauge trend strength.
Statistical Methods: Use statistical tools such as regression analysis to model and forecast future prices based on past data.
These techniques can provide insights but should be used with risk management practices to mitigate potential losses.
What impact do stock splits have on historical price data?
When a company performs a stock split, it adjusts the historical price data to reflect the new, lower trading price as if it had always been that way.
This ensures consistency for anyone analyzing the stock’s past prices. The adjustment helps prevent misleading signals on charts, such as false sell signals or bearish trends that aren’t there. For instance, in a 2-for-1 stock split, the price per share is cut in half, which would otherwise appear as a dramatic drop on the chart. If someone didn’t know about the split, they might wrongly think something negative happened to the company. Most technical indicators would also react to this apparent drop by signaling to sell.
A stock split, while making the shares seem more affordable and potentially more attractive to investors, doesn’t alter the company’s fundamental value.
This ensures consistency for anyone analyzing the stock’s past prices. The adjustment helps prevent misleading signals on charts, such as false sell signals or bearish trends that aren’t there. For instance, in a 2-for-1 stock split, the price per share is cut in half, which would otherwise appear as a dramatic drop on the chart. If someone didn’t know about the split, they might wrongly think something negative happened to the company. Most technical indicators would also react to this apparent drop by signaling to sell.
A stock split, while making the shares seem more affordable and potentially more attractive to investors, doesn’t alter the company’s fundamental value.
Why do the PRTA stock historical prices show a range for periods like 30 days, 90 days, and 52 weeks?
The range provides the lowest and highest prices at which the stock has traded during the specified period. This helps investors understand the stock’s volatility and price variability within that timeframe.
How can I use historical price volatility to assess risk?
High price volatility historically indicates higher risk and potentially higher returns. Investors can gauge the stock’s risk level by examining the range between high and low prices over various periods.
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