Why is SION Down Today?

SION
$4.89
▼ -4.12% ($-0.20)
Last updated: Oct 02, 2026 8:33 PM ET (361 min ago)

About Sionna Therapeutics, Inc. Common Stock

Sionna Therapeutics Inc is a clinical-stage biopharmaceutical company on a mission to revolutionize the current treatment paradigm for cystic fibrosis (CF) patients by developing novel medicines that normalize the function of the cystic fibrosis transmembrane conductance regulator (CFTR) protein to ...

Sector: PHARMACEUTICAL PREPARATIONS
Market Cap: $1.26B
Forward P/E: -18.5
52-Week Range: $4.01 - $54.97
Employees: 48

Overall Confidence: 65%

65% Confident

Based on news, social sentiment, options activity, and sector analysis

SECTOR 65% Confidence
🎯 PHARMACEUTICAL PREPARATIONS sector moving together
This appears to be a sector-wide move. The PHARMACEUTICAL PREPARATIONS sector is down 1.6% on average.

✅ Move Confirmation

LOW VOLUME 0.6x average volume

UNCONFIRMED - Low volume suggests this move may not be sustainable.

📍 Sector Context

PHARMACEUTICAL PREPARATIONS sector: -1.6%

This appears to be a sector-wide move. Most PHARMACEUTICAL PREPARATIONS stocks are moving in the same direction.

Market Comparison

SION is significantly underperforming the market (-4.9% vs SPY)
S&P 500
SPY
+0.74%
Nasdaq 100
QQQ
+1.02%
SION
This Stock
-4.12%
vs S&P 500: -4.86%
vs Nasdaq: -5.14%

📊 What Happens Next?

Probability Analysis

45% chance this move continues in the next 1-3 days

Expected Range

Based on historical patterns and options pricing, SION is expected to trade between:
$4.74 - $4.99

Key Level to Watch

$4.65 support
Watch for breakdown below $4.89

🔔 Get SION Alerts

We'll notify you when SION's trend changes or a new signal fires.

Last updated: Oct 02, 2026 8:33 PM (361 minutes ago)
Data refreshes every 30 minutes during market hours

Options Market Insight

Bullish
Options Sentiment
0.56
Put/Call Ratio
215.4%
Implied Volatility
Call Volume: 10,946
Put Volume: 6,078
Total: 17,024

Historical Context

SION has moved more than 3.0% down on 51 occasions in the past year.

29.4%
Continuation Rate
15/51 times continued down
+1.28%
Avg Next Day Change
After similar down moves
Last similar move: Oct 01, 2026 (-3.0%) → Next day: -4.1%

Frequently Asked Questions

Why is SION stock down today?

This appears to be a sector-wide move. The PHARMACEUTICAL PREPARATIONS sector is down 1.6% on average.

Is SION stock a buy or sell right now?

Based on current analysis, SION shows 65% confidence in today's move. Volume is low which does not confirm the trend. View full buy/sell analysis →

What is the SION stock price target?

SION is currently trading at $4.89. Based on today's momentum, the expected short-term range is $4.74 - $4.99. See long-term price prediction →

Will SION stock continue falling?

Our analysis shows a 45% probability that SION's move continues in the next 1-3 days. Key level to watch: $4.65 (support).

Is SION stock oversold or overbought?

SION's RSI (Relative Strength Index) is currently at 27.0. This indicates oversold conditions - the stock may be due for a bounce as selling pressure appears exhausted.

What is the momentum for SION stock?

SION's 10-day momentum indicator is at -1.05. Negative momentum - the stock has mild downward pressure which may continue short-term.

Is SION outperforming or underperforming the market?

SION (-4.12%) is currently significantly underperforming the market (-4.9% vs SPY). Today, the S&P 500 (SPY) is up 0.74%, and Nasdaq (QQQ) is up 1.02%.

What does MACD indicate for SION?

SION's MACD (-2.34) is currently above the signal line (-2.94), indicating a bullish trend. This technical signal suggests buying pressure is dominant. The trend strength (ADX: 43.0) is strong.

Is SION in an uptrend or downtrend?

Based on moving average analysis, SION is in a bearish trend. The price ($4.89) is trading below both the 20-day SMA ($6.31) and 50-day SMA ($15.28). This alignment typically indicates sustained downward pressure.

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