Why is ANNX Down Today?

ANNX
$3.99
▼ -3.74% ($-0.15)
Last updated: Sep 11, 2026 8:33 PM ET

About Annexon, Inc. Common Stock

Annexon Inc is a clinical-stage biopharmaceutical company developing a pipeline of novel therapies for patients with classical complement-mediated disorders of the body, brain, and eye. Its pipeline is based on its platform technology addressing well-researched classical complement-mediated autoimmu...

Sector: PHARMACEUTICAL PREPARATIONS
Market Cap: $332.96M
Forward P/E: -2.3
52-Week Range: $2.32 - $7.18
Employees: 103

Overall Confidence: 68%

68% Confident

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

OPTIONS 75% Confidence
🎯 Unusual PUT buying detected
Options traders are heavily buying puts on ANNX, with 86% of volume in puts. This suggests bearish institutional positioning.
SYMPATHY 60% Confidence
Outperforming sector by 3.2%
This stock is significantly underperforming its PHARMACEUTICAL PREPARATIONS sector peers, suggesting a stock-specific catalyst.

✅ Move Confirmation

MODERATE VOLUME 1.1x average volume

NORMAL - This move is backed by significant volume and appears sustainable.

📍 Sector Context

PHARMACEUTICAL PREPARATIONS sector: -0.5%

ANNX is outperforming its sector by -3.2%. This suggests a stock-specific catalyst.

Market Comparison

ANNX is significantly underperforming the market (-4.6% vs SPY)
S&P 500
SPY
+0.85%
Nasdaq 100
QQQ
+0.87%
ANNX
This Stock
-3.74%
vs S&P 500: -4.59%
vs Nasdaq: -4.61%

📊 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, ANNX is expected to trade between:
$3.87 - $4.06

Key Level to Watch

$3.79 support
Watch for breakdown below $3.98

🔔 Get ANNX Alerts

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

Last updated: Sep 11, 2026 8:33 PM (-250 minutes ago)
Data refreshes every 30 minutes during market hours

Options Market Insight

Neutral
Options Sentiment
0.91
Put/Call Ratio
188.3%
Implied Volatility
Call Volume: 24,485
Put Volume: 22,375
Total: 46,860
Unusual Activity: $5 PUT (4,370 vol) $4 PUT (4,370 vol) $5 CALL (2,159 vol)

Historical Context

ANNX has moved more than 3.0% down on 55 occasions in the past year.

50.9%
Continuation Rate
28/55 times continued down
+0.54%
Avg Next Day Change
After similar down moves
Last similar move: Sep 10, 2026 (-5.3%) → Next day: -3.7%

Frequently Asked Questions

Why is ANNX stock down today?

Options traders are heavily buying puts on ANNX, with 86% of volume in puts. This suggests bearish institutional positioning.

Is ANNX stock a buy or sell right now?

Based on current analysis, ANNX shows 68% confidence in today's move. Volume is moderate which supports the trend. View full buy/sell analysis →

What is the ANNX stock price target?

ANNX is currently trading at $3.99. Based on today's momentum, the expected short-term range is $3.87 - $4.06. See long-term price prediction →

Will ANNX stock continue falling?

Our analysis shows a 45% probability that ANNX's move continues in the next 1-3 days. Key level to watch: $3.79 (support).

Is ANNX stock oversold or overbought?

ANNX's RSI (Relative Strength Index) is currently at 26.1. This indicates oversold conditions - the stock may be due for a bounce as selling pressure appears exhausted.

What is the momentum for ANNX stock?

ANNX's 10-day momentum indicator is at -1.26. Negative momentum - the stock has mild downward pressure which may continue short-term.

Is ANNX outperforming or underperforming the market?

ANNX (-3.74%) is currently significantly underperforming the market (-4.6% vs SPY). Today, the S&P 500 (SPY) is up 0.85%, and Nasdaq (QQQ) is up 0.87%.

What does MACD indicate for ANNX?

ANNX's MACD (-0.26) is currently below the signal line (-0.16), indicating a bearish trend. This technical signal suggests selling pressure is dominant. The trend strength (ADX: 18.8) is weak.

Is ANNX in an uptrend or downtrend?

Based on moving average analysis, ANNX is in a bearish trend. The price ($3.99) is trading below both the 20-day SMA ($4.93) and 50-day SMA ($5.27). This alignment typically indicates sustained downward pressure.

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