TGEN · Tecogen Inc.

Track TGEN — free Ask ALVIS about TGEN

$3.23 -0.17 (-5.00%) At close · Jul 24

Market Cap

$101.72M

29.92M

Options Chain

15-min delayed Underlying $3.23 · today Options Calculator

Positioning

Aug 21, 2026 · 27 days to expiry · 8 contracts

Put / call OI

0.44

Call-heavy positioning

Open interest

588

contracts outstanding

Volume

traded today

Max pain

$5.00

$1.77 above spot

ATM implied vol

220.6%

market's expected move

Open interest by strike

Calls Puts

2.5

7.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 27d Sep 18 55d Oct 16 83d Jan 15 174d May 21 300d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
29	1	249.4%	0.764	$1.31		$0.30	-0.227	191.7%	61	150
Call · $2.5 In the money Last $1.31 Breakeven $3.81 Implied vol 249.4% Delta 0.764 ≈76% ITM Gamma 0.142 Theta -0.013 Vega 0.003 Open interest 29 Model this call Put · $2.5 Last $0.30 Breakeven $2.20 Implied vol 191.7% Delta -0.227 ≈23% ITM Gamma 0.179 Theta -0.009 Vega 0.003 Open interest 150 Model this put
Underlying $3.23
352	24	187.2%	0.277	$0.22		$2.01	-0.738	180.4%	1	27
Call · $5 Last $0.22 Breakeven $5.22 Implied vol 187.2% Delta 0.277 ≈28% ITM Gamma 0.203 Theta -0.01 Vega 0.003 Open interest 352 Model this call Put · $5 In the money Last $2.01 Breakeven $2.99 Implied vol 180.4% Delta -0.738 ≈74% ITM Gamma 0.206 Theta -0.009 Vega 0.003 Open interest 27 Model this put
23	1	261.6%	0.206	$0.20		$3.54	—	—	3	3
Call · $7.5 Last $0.20 Breakeven $7.70 Implied vol 261.6% Delta 0.206 ≈21% ITM Gamma 0.123 Theta -0.012 Vega 0.002 Open interest 23 Model this call Put · $7.5 In the money Last $3.54 Breakeven $3.96 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this put
3	1	394.1%	0.304	$0.43		$6.50	—	—	1	1
Call · $10 Last $0.43 Breakeven $10.43 Implied vol 394.1% Delta 0.304 ≈30% ITM Gamma 0.099 Theta -0.022 Vega 0.004 Open interest 3 Model this call Put · $10 In the money Last $6.50 Breakeven $3.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1537435 CUSIP 87876P201 13F (30d) 7 filings 7 filers Visit website Investor relations