Tecogen Inc

TGENAMEX · USD
2.95USD0.00 (-6.65%)
212

Tecogen Inc (TGEN) Historical Volatility

TGEN 30-day historical volatility is 58%. This ranks in the 1th percentile of readings over the past year.

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Tracking TGEN historical volatility helps you see how much Tecogen Inc's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Tecogen Inc's HV tells you what really happened. Use our scanner to monitor TGEN 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The TGEN 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Tecogen Inc's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.

Tecogen Inc. designs, manufactures, markets, and maintains industrial and commercial cogeneration systems for residential, commercial, recreational, and industrial use in the United States and internationally. It operates through three segments: Products, Services, and Energy Production. The company offers InVerde e+ and TecoPower, a cogeneration product that supplies electricity and hot water; TECOCHILL air-conditioning and refrigeration chillers; Tecofrost gas engine-driven refrigeration compressors; and water heaters under the Ilios brand name, as well as emissions control technology under the Ultera brand name.

It also provides long-term maintenance contracts, parts sales, and turnkey installation services through a network of eleven field service centers in California, the Midwest, the Northeast, and the Southeast, as well as in Ontario, Canada. In addition, the company installs, owns, operates, and maintains distributed generation of electricity, energy, and other complementary systems. It serves hospitals and nursing homes, colleges, universities, health clubs, spas, hotels, motels, office and retail buildings, food and beverage processors, multi-unit residential buildings, laundries, ice rinks, swimming pools, factories, municipal buildings, military installations, and indoor growing facilities. The company was incorporated in 2000 and is headquartered in Waltham, Massachusetts.

Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Tecogen Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where TGEN HV is running hot, cold, or in line. Make the TGEN 30 day historical volatility — and every other window — work for your edge instead of against it.

IV vs HV
Implied Volatility (IV) vs Historical Volatility (HV) over the past month.

As of September 29, 2026

IV - HV Difference
Difference between IV and HV over time. Positive values indicate IV > HV.

As of September 29, 2026

See how volatility has moved over time

Track TGEN historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.

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