Why is SPRO Down Today?

SPRO
$1.20
▼ -4.76% ($-0.06)
Last updated: Oct 02, 2026 8:32 PM ET

About Spero Therapeutics, Inc. Common Stock

Spero Therapeutics Inc is a clinical-stage biopharmaceutical firm. It focuses on identifying, developing, and commercializing novel treatments for MDR (Multi-drug-resistant) bacterial infections and rare diseases. The company's product candidate, tebipenem pivoxil hydrobromide or tebipenem HBr, is d...

Sector: PHARMACEUTICAL PREPARATIONS
Market Cap: $110.30M
Forward P/E: 3.7
52-Week Range: $1.08 - $3.08
Employees: 32

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 0.9x 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

SPRO is significantly underperforming the market (-5.5% vs SPY)
S&P 500
SPY
+0.74%
Nasdaq 100
QQQ
+1.02%
SPRO
This Stock
-4.76%
vs S&P 500: -5.5%
vs Nasdaq: -5.78%

📊 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, SPRO is expected to trade between:
$1.16 - $1.22

Key Level to Watch

$1.14 support
Watch for breakdown below $1.20

🔔 Get SPRO Alerts

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

Last updated: Oct 02, 2026 8:32 PM (-9 minutes ago)
Data refreshes every 30 minutes during market hours

Options Market Insight

Bullish
Options Sentiment
0.25
Put/Call Ratio
194.6%
Implied Volatility
Call Volume: 30,119
Put Volume: 7,678
Total: 37,797
Unusual Activity: $2.5 CALL (4,449 vol) $2.5 CALL (1,430 vol) $2.5 PUT (1,214 vol)

Historical Context

SPRO has moved more than 3.0% down on 40 occasions in the past year.

42.5%
Continuation Rate
17/40 times continued down
-0.14%
Avg Next Day Change
After similar down moves
Last similar move: Sep 28, 2026 (-3.3%) → Next day: +0.8%

Frequently Asked Questions

Why is SPRO stock down today?

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

Is SPRO stock a buy or sell right now?

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

What is the SPRO stock price target?

SPRO is currently trading at $1.20. Based on today's momentum, the expected short-term range is $1.16 - $1.22. See long-term price prediction →

Will SPRO stock continue falling?

Our analysis shows a 45% probability that SPRO's move continues in the next 1-3 days. Key level to watch: $1.14 (support).

Is SPRO stock oversold or overbought?

SPRO's RSI (Relative Strength Index) is currently at 47.2. This shows bearish momentum - the stock has negative momentum but isn't oversold yet.

What is the momentum for SPRO stock?

SPRO's 10-day momentum indicator is at 0.06. Positive momentum - the stock has mild upward pressure supporting the current trend.

Is SPRO outperforming or underperforming the market?

SPRO (-4.76%) is currently significantly underperforming the market (-5.5% vs SPY). Today, the S&P 500 (SPY) is up 0.74%, and Nasdaq (QQQ) is up 1.02%.

What does MACD indicate for SPRO?

SPRO's MACD (-0.01) is currently above the signal line (-0.02), indicating a bullish trend. This technical signal suggests buying pressure is dominant. The trend strength (ADX: 30.2) is strong.

Is SPRO in an uptrend or downtrend?

Based on moving average analysis, SPRO is in a mixed/transitional trend. The price and moving averages are not clearly aligned, suggesting a potential trend change or consolidation phase. 20-day SMA: $1.19, 50-day SMA: $1.2.

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