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Prothena (PRTA)

(Delayed Data from NSDQ)

$8.18 USD

8.18
459,042

+0.12 (1.49%)

Updated Sep 18, 2025 04:00 PM ET

After-Market: $8.19 +0.01 (0.12%) 7:58 PM ET

Zacks Rank:

This is our short term rating system that serves as a timeliness indicator for stocks over the next 1 to 3 months. How good is it? See rankings and related performance below.

Zacks Rank Definition Annualized Return
1Strong Buy23.64%
2Buy17.83%
3Hold9.69%
4Sell5.29%
5Strong Sell2.54%
S&P50011.29%

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3-Hold of 5     3    

Style Scores:

The Style Scores are a complementary set of indicators to use alongside the Zacks Rank. It allows the user to better focus on the stocks that are the best fit for his or her personal trading style.

The scores are based on the trading styles of Value, Growth, and Momentum. There's also a VGM Score ('V' for Value, 'G' for Growth and 'M' for Momentum), which combines the weighted average of the individual style scores into one score.

  • Value Score A
  • Growth Score A
  • Momentum Score A
  • VGM Score A

Within each Score, stocks are graded into five groups: A, B, C, D and F. As you might remember from your school days, an A, is better than a B; a B is better than a C; a C is better than a D; and a D is better than an F.

As an investor, you want to buy stocks with the highest probability of success. That means you want to buy stocks with a Zacks Rank #1 or #2, Strong Buy or Buy, which also has a Score of an A or a B in your personal trading style.

Zacks Style Scores Education - Learn more about the Zacks Style Scores

F Value C Growth B Momentum F VGM

Industry Rank:

The Zacks Industry Rank assigns a rating to each of the 265 X (Expanded) Industries based on their average Zacks Rank.

An industry with a larger percentage of Zacks Rank #1's and #2's will have a better average Zacks Rank than one with a larger percentage of Zacks Rank #4's and #5's.

The industry with the best average Zacks Rank would be considered the top industry (1 out of 265), which would place it in the top 1% of Zacks Ranked Industries. The industry with the worst average Zacks Rank (265 out of 265) would place in the bottom 1%.

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Zacks Industry Rank Education -- Learn more about the Zacks Industry Rank

Top 36% (89 out of 245)

Industry: Medical - Biomedical and Genetics

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Fundamental Charts

Research for PRTA

The Zacks Equity Research reports, or ZER for short, are our in-house, independently produced research reports.

The ever popular one-page Snapshot reports are generated for virtually every single Zacks Ranked stock. It's packed with all of the company's key stats and salient decision making information. Including the Zacks Rank, Zacks Industry Rank, Style Scores, the Price, Consensus & Surprise chart, graphical estimate analysis and how a stocks stacks up to its peers.

The detailed multi-page Analyst report does an even deeper dive on the company's vital statistics. In addition to all of the proprietary analysis in the Snapshot, the report also visually displays the four components of the Zacks Rank (Agreement, Magnitude, Upside and Surprise); provides a comprehensive overview of the company business drivers, complete with earnings and sales charts; a recap of their last earnings report; and a bulleted list of reasons to buy or sell the stock. It also includes an industry comparison table to see how your stock compares to its expanded industry, and the S&P 500.

Researching stocks has never been so easy or insightful as with the ZER Analyst and Snapshot reports.

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About Price to Cash Flow

The Price to Cash Flow ratio or P/CF is price divided by its cash flow per share. It's another great way to determine whether a company is undervalued or overvalued with the denominator being cash flow. One of the reasons why some investors prefer the P/CF ratio over the P/E ratio is because the net income of the cash flow portion rightly adds depreciation and amortization back in since these are not cash expenditures. In contrast, the net income that goes into the earnings portion of the P/E ratio does not add these in, thus artificially reducing the income and skewing the P/E ratio. Like the P/E ratio, a lower number is considered better. A value under 20 is generally considered good.

PRTA 8.18 +0.12(1.49%)

Will PRTA be a Portfolio Killer in September?

Zacks Investment Research is releasing its prediction for PRTA based on the 1-3 month trading system that more than doubles the S&P 500.

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