Spero Therapeutics (SPRO) Options Chain
NASDAQ: SPROHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Jan 15, 2027
- Days to expiration
- 96
- Share price
- $1.20
- Put/call ratio (OI)
- 0.05
- Put/call ratio (volume)
- 14.84
- ATM implied volatility
- 199.2%
- Expected move
- ±$1.23
- Open interest (C / P)
- 2.41K / 110
SPRO options summary
The SPRO options chain for the January 15, 2027 expiration lists 5 call and 6 put contracts, with 96 days until expiration. Open interest stands at 2,411 calls and 110 puts, a put/call ratio of 0.05, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $1.00 strike is 199.2%, which implies the market expects a move of about ±$1.23 (102.2%) in Spero Therapeutics stock by expiration.
The most open interest sits at the $2.50 call (2.10K contracts) and the $2.50 put (108 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
SPRO options chain · January 15, 2027
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 0.50 | 0.00 | 0.00 | 0.06 | |||||
| 0.45 | 0.00 | 1.00 | 1.00 | 0.00 | 0.75 | 0.10 | |||||
| 0.05 | 0.00 | 0.30 | 1.50 | 0.00 | 0.00 | 0.51 | |||||
| — | — | — | 2.00 | 0.50 | 1.50 | 0.78 | |||||
| 0.04 | 0.00 | 0.05 | 2.50 | 1.25 | 1.55 | 1.30 | |||||
| 0.05 | 0.00 | 0.15 | 5.00 | 3.20 | 4.20 | 3.40 | |||||
| 0.05 | 0.00 | 0.10 | 7.50 | — | — | — | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the SPRO put/call ratio?
For the January 15, 2027 expiration, the SPRO put/call ratio based on open interest is 0.05 (110 puts vs 2,411 calls), and 14.84 based on today's volume. A ratio above 1 means more puts than calls.
What is SPRO's implied volatility?
At-the-money implied volatility for SPRO options expiring January 15, 2027 is about 199.2%, an annualized estimate of how much the market expects Spero Therapeutics stock to move.
How many SPRO option expiration dates are there?
SPRO has 4 listed expiration dates, from Oct 16, 2026 to Apr 16, 2027.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.