Alector (ALEC) Options Chain
NASDAQ: ALECHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
After hours: 2.02 0.00%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $2.02
- Put/call ratio (OI)
- 0.13
- Put/call ratio (volume)
- 0.15
- Expected move
- ±$0.2687
- Open interest (C / P)
- 6.42K / 856
ALEC options summary
The ALEC options chain for the October 16, 2026 expiration lists 7 call and 5 put contracts, with 8 days until expiration. Open interest stands at 6,416 calls and 856 puts, a put/call ratio of 0.13, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 89.8%, which implies the market expects a move of about ±$0.2687 (13.3%) in Alector stock by expiration.
The most open interest sits at the $2.50 call (3.97K contracts) and the $2.00 put (693 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ALEC options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.45 | 1.10 | 2.10 | 0.50 | 0.00 | 0.00 | 0.21 | |||||
| 1.16 | 0.50 | 1.50 | 1.00 | 0.00 | 0.00 | 0.23 | |||||
| 1.00 | 0.00 | 1.00 | 1.50 | 0.00 | 0.10 | 0.04 | |||||
| 0.12 | 0.00 | 0.20 | 2.00 | 0.05 | 0.20 | 0.10 | |||||
| 0.05 | 0.00 | 0.05 | 2.50 | 0.00 | 0.85 | 0.05 | |||||
| 0.05 | 0.00 | 0.05 | 5.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.20 | 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 ALEC put/call ratio?
For the October 16, 2026 expiration, the ALEC put/call ratio based on open interest is 0.13 (856 puts vs 6,416 calls), and 0.15 based on today's volume. A ratio above 1 means more puts than calls.
What is ALEC's implied volatility?
At-the-money implied volatility for ALEC options expiring October 16, 2026 is about 89.8%, an annualized estimate of how much the market expects Alector stock to move.
How many ALEC option expiration dates are there?
ALEC 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.