CSTL vs OPK

Head-to-Head Stock Analysis & Investment Rating

Last Updated: Aug 14, 2026

CSTL

30.8
AI Score
VS
OPK Wins

OPK

48.4
AI Score

Investment Advisor Scores

CSTL

31score
Recommendation
SELL

OPK

48score
Recommendation
HOLD

AI Analyst Insights

Detailed Metrics Comparison

Metric CSTL OPK Winner
Forward P/E 0 53.7634 Tie
PEG Ratio 0 93.6471 Tie
Revenue Growth 20.1% 4.3% CSTL
Earnings Growth -51.6% -12.6% OPK
Tradestie Score 30.8/100 48.4/100 OPK
Profit Margin -5.4% -12.4% CSTL
Beta 1.00 1.00 Tie
AI Recommendation SELL HOLD OPK

Relative Price Performance (Last 90 Days)

CSTL 1M: +34.2% · 3M: +66.5% OPK 1M: +26.5% · 3M: +15.6%

Current Technical Phase

CSTL

Markup
Hold / add on dips

Price above SMA50, rising 50-day trend (17.4% over 20 days), RSI 72

RSI (14): 71.6 · Price: $34.20

OPK

Markup
Hold / add on dips

Price above SMA50, rising 50-day trend (2.0% over 20 days), RSI 62

RSI (14): 61.8 · Price: $1.48

Fundamentals Snapshot

Metric CSTL OPK
Market Cap
Forward P/E -34.6 -5.4
Trailing P/E
Revenue (TTM)
Revenue Growth 0.2% 0.0%
Gross Margin 0.8% 0.2%
Operating Margin 0.0% -0.2%
EPS -0.65 -0.07
Dividend Yield

Frequently Asked Questions

Based on our detailed analysis, OPK is currently the stronger investment candidate based on our comprehensive scoring model.

We analyze revenue and earnings growth rates in the "Growth" section above. Generally, the company with higher year-over-year revenue and EPS growth is fostering better expansion. Check the table above for the specific growth percentages.

Valuation is determined by metrics like the P/E Ratio and PEG Ratio. A lower P/E typically suggests a stock is cheaper relative to its earnings. Refer to the "Valuation" section in our comparison table to see which stock currently trades at a more attractive multiple.