REPLIGEN CORP (RGEN) Implied Volatility
REPLIGEN CORP (RGEN) options trade at a 30-day at-the-money implied volatility of 45.8%, an IV rank of 42 out of 100 over the past year. This page breaks down RGEN's implied volatility in plain English: where it sits versus its own history, how it compares with realized movement, and what the term structure and skew are saying.
Data as of Aug 24, 2026, 3:55 PM ET · OPRA data 15 minutes delayed · For information only — not investment advice.
Implied Volatility & Expected Move
RGEN 30-day at-the-money implied volatility, past year.
| ATM IV — front expiration | 45.8% |
| ATM IV — 2 month | 40.8% |
| IV rank (1 year) | 42 / 100 |
| IV percentile (1 year) | 15% |
| Expected move (front expiration) | ±$21.72 (±12.0%) |
| Historical volatility — 10 day | 31.3% |
| Historical volatility — 21 day | 52.8% |
| Historical volatility — 30 day | 50.7% |
| Historical volatility — 60 day | 51.4% |
| IV / HV ratio | 0.90 |
| Term slope (front − 3M) | +5.0 pts |
An IV rank of 42 places current implied volatility in the middle of its 52-week range. An IV/HV ratio of 0.90 means implied volatility is roughly in line with recent realized volatility. The term structure is in backwardation — front-month IV exceeds 3-month IV, a pattern often seen around near-term events.
RGEN IV Rank History
RGEN IV rank (0–100), past year.
IV rank has fallen from 54 in Feb '26 to 42 today. An IV percentile of 15% means implied volatility was lower than today on 15% of trading days in the past year.
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RGEN Options FAQ
What is the implied volatility of RGEN options?
RGEN options trade at a 30-day at-the-money implied volatility of 45.8% as of Aug 24, 2026. That is an IV rank of 42 out of 100, meaning implied volatility is subdued relative to its own 52-week range.
Is RGEN implied volatility high or low right now?
By its own 52-week standards, RGEN implied volatility is currently moderate: IV rank is 42 out of 100 as of Aug 24, 2026. Compared with realized movement, the IV/HV ratio of 0.90 shows options pricing less movement than the stock has recently delivered.
What move do RGEN options imply before the next expiration?
Front-expiration RGEN options imply a one-standard-deviation move of ±$21.72 (±12.0%) as of Aug 24, 2026, derived from at-the-money option prices.
What is the difference between RGEN's IV rank and IV percentile?
IV rank (currently 42) measures where today's implied volatility sits between its 52-week low and high. IV percentile (currently 15%) counts the share of trading days in the past year with lower implied volatility than today. Percentile is less distorted by one-off volatility spikes.
Methodology. IV rank compares the current 30-day at-the-money implied volatility with its highest and lowest values over the past 52 weeks. Max pain is the strike that minimizes the total payout to option holders at expiration. The call and put walls are the strikes carrying the largest call and put open interest across all expirations. Net gamma exposure (GEX) is measured from the dealer perspective. All statistics are derived from delayed OPRA options data.
Options trading involves significant risk, and losses can exceed your initial investment. Always consult a licensed financial professional before making investment decisions. OptiView does not provide financial advice; all figures on this page are descriptive statistics, not recommendations.