Tecogen (TGEN) Options Chain
NYSE: TGENIndustrialsIndustrial Machinery/ComponentsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $2.42
- Put/call ratio (OI)
- 0.33
- Put/call ratio (volume)
- 13.00
- ATM implied volatility
- 153.5%
- Expected move
- ±$1.23
- Open interest (C / P)
- 52 / 17
TGEN options summary
The TGEN options chain for the November 20, 2026 expiration lists 2 call and 2 put contracts, with 40 days until expiration. Open interest stands at 52 calls and 17 puts, a put/call ratio of 0.33, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 153.5%, which implies the market expects a move of about ±$1.23 (50.8%) in Tecogen stock by expiration.
The most open interest sits at the $5.00 call (37 contracts) and the $2.50 put (10 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
TGEN options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.70 | 0.15 | 1.05 | 2.50 | 0.10 | 0.70 | 0.50 | |||||
| 0.05 | 0.00 | 0.10 | 5.00 | 2.15 | 2.85 | 2.21 | |||||
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 TGEN put/call ratio?
For the November 20, 2026 expiration, the TGEN put/call ratio based on open interest is 0.33 (17 puts vs 52 calls), and 13.00 based on today's volume. A ratio above 1 means more puts than calls.
What is TGEN's implied volatility?
At-the-money implied volatility for TGEN options expiring November 20, 2026 is about 153.5%, an annualized estimate of how much the market expects Tecogen stock to move.
How many TGEN option expiration dates are there?
TGEN has 5 listed expiration dates, from Oct 16, 2026 to May 21, 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.