Photronics Inc

PLABNASDAQ · USD
29.10USD+0.59 (+2.07%)
997

Photronics Inc (PLAB) Historical Volatility

PLAB 30-day historical volatility is 46%. This ranks in the 10th percentile of readings over the past year.

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Tracking PLAB historical volatility helps you see how much Photronics 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, Photronics Inc's HV tells you what really happened. Use our scanner to monitor PLAB 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 PLAB 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Photronics 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.

Photronics, Inc., together with its subsidiaries, engages in the manufacture and sale of photomask products and services in the United States, Taiwan, Korea, Europe, China, and internationally. The company offers photomasks that are used in the manufacture of integrated circuits and flat panel displays (FPDs); and to transfer circuit patterns onto semiconductor wafers, FDP substrates, and other types of electrical and optical components. It sells its products to semiconductor and FPD manufacturers, designers, and foundries, as well as to other high-performance electronics manufacturers through its sales personnel and customer service representatives.

The company was formerly known as Photronic Labs, Inc. and changed its name to Photronics, Inc. in 1990. Photronics, Inc. was incorporated in 1969 and is based in Brookfield, Connecticut.

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 Photronics Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where PLAB HV is running hot, cold, or in line. Make the PLAB 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 17, 2026

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

As of September 17, 2026

See how volatility has moved over time

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

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