Why is ALDX Down Today?

ALDX
$1.40
▼ -4.11% ($-0.06)
Last updated: Sep 11, 2026 8:32 PM ET (148 min ago)

About Aldeyra Therapeutics, Inc.

Aldeyra Therapeutics Inc is a biotechnology company engaged in developing and commercializing next-generation medicines to improve the lives of patients with immune-mediated and metabolic diseases. The company's product candidate, Reproxalap, is a treatment in late-stage development for dry eye dise...

Sector: PHARMACEUTICAL PREPARATIONS
Market Cap: $314.64M
Forward P/E: 8.9
52-Week Range: $1.07 - $5.93
Employees: 8

Overall Confidence: 65%

65% Confident

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

SYMPATHY 60% Confidence
🎯 Outperforming sector by 3.6%
This stock is significantly underperforming its PHARMACEUTICAL PREPARATIONS sector peers, suggesting a stock-specific catalyst.

✅ Move Confirmation

MODERATE VOLUME 2.0x average volume

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

📍 Sector Context

PHARMACEUTICAL PREPARATIONS sector: -0.5%

ALDX is outperforming its sector by -3.6%. This suggests a stock-specific catalyst.

Market Comparison

ALDX is significantly underperforming the market (-5.0% vs SPY)
S&P 500
SPY
+0.85%
Nasdaq 100
QQQ
+0.87%
ALDX
This Stock
-4.11%
vs S&P 500: -4.96%
vs Nasdaq: -4.98%

📊 What Happens Next?

Probability Analysis

55% chance this move continues in the next 1-3 days

Expected Range

Based on historical patterns and options pricing, ALDX is expected to trade between:
$1.36 - $1.43

Key Level to Watch

$1.33 support
Watch for breakdown below $1.40

🔔 Get ALDX Alerts

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

Last updated: Sep 11, 2026 8:32 PM (148 minutes ago)
Data refreshes every 30 minutes during market hours

Options Market Insight

Bullish
Options Sentiment
0.34
Put/Call Ratio
293.3%
Implied Volatility
Call Volume: 33,141
Put Volume: 11,284
Total: 44,425
Unusual Activity: $1.5 CALL (2,904 vol) $1.5 CALL (2,894 vol) $1.5 CALL (2,400 vol)

Historical Context

ALDX has moved more than 3.0% down on 50 occasions in the past year.

50.0%
Continuation Rate
25/50 times continued down
+0.35%
Avg Next Day Change
After similar down moves
Last similar move: Aug 28, 2026 (-3.6%) → Next day: -0.3%

Frequently Asked Questions

Why is ALDX stock down today?

This stock is significantly underperforming its PHARMACEUTICAL PREPARATIONS sector peers, suggesting a stock-specific catalyst.

Is ALDX stock a buy or sell right now?

Based on current analysis, ALDX shows 65% confidence in today's move. Volume is moderate which supports the trend. View full buy/sell analysis →

What is the ALDX stock price target?

ALDX is currently trading at $1.40. Based on today's momentum, the expected short-term range is $1.36 - $1.43. See long-term price prediction →

Will ALDX stock continue falling?

Our analysis shows a 55% probability that ALDX's move continues in the next 1-3 days. Key level to watch: $1.33 (support).

Is ALDX stock oversold or overbought?

ALDX's RSI (Relative Strength Index) is currently at 31.4. This shows bearish momentum - the stock has negative momentum but isn't oversold yet.

What is the momentum for ALDX stock?

ALDX's 10-day momentum indicator is at -0.2. Negative momentum - the stock has mild downward pressure which may continue short-term.

Is ALDX outperforming or underperforming the market?

ALDX (-4.11%) is currently significantly underperforming the market (-5.0% vs SPY). Today, the S&P 500 (SPY) is up 0.85%, and Nasdaq (QQQ) is up 0.87%.

What does MACD indicate for ALDX?

ALDX's MACD (-0.05) is currently below the signal line (-0.04), indicating a bearish trend. This technical signal suggests selling pressure is dominant. The trend strength (ADX: 21.5) is moderate.

Is ALDX in an uptrend or downtrend?

Based on moving average analysis, ALDX is in a bearish trend. The price ($1.40) is trading below both the 20-day SMA ($1.51) and 50-day SMA ($1.65). This alignment typically indicates sustained downward pressure.

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