Tecogen (TGEN) Options Chain
NYSE: TGENIndustrialsIndustrial Machinery/ComponentsUSD
Market open · Delayed 15 min · as of Oct 9, 9:38 AM ET
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $2.52
- Put/call ratio (OI)
- 0.47
- Put/call ratio (volume)
- 4.49
- Expected move
- ±$0.0109
- Open interest (C / P)
- 2.90K / 1.37K
TGEN options summary
The TGEN options chain for the October 16, 2026 expiration lists 5 call and 4 put contracts, with 7 days until expiration. Open interest stands at 2,902 calls and 1,368 puts, a put/call ratio of 0.47, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 3.1%, which implies the market expects a move of about ±$0.0109 (0.4%) in Tecogen stock by expiration.
The most open interest sits at the $5.00 call (2.10K contracts) and the $2.50 put (1.30K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
TGEN options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.45 | 0.00 | 0.00 | 2.50 | 0.00 | 0.00 | 0.06 | |||||
| 0.03 | 0.00 | 0.00 | 5.00 | 0.00 | 0.00 | 2.55 | |||||
| 0.05 | 0.00 | 0.00 | 7.50 | 3.90 | 5.00 | 4.50 | |||||
| 0.19 | 0.00 | 0.20 | 10.00 | 4.60 | 5.80 | 5.06 | |||||
| 0.10 | 0.00 | 0.00 | 12.50 | — | — | — | |||||
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 TGEN put/call ratio?
For the October 16, 2026 expiration, the TGEN put/call ratio based on open interest is 0.47 (1,368 puts vs 2,902 calls), and 4.49 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 October 16, 2026 is about 3.1%, 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.