Energy Recovery, Inc. (ERII) Implied Volatility
Energy Recovery, Inc. (ERII) options trade at a 30-day at-the-money implied volatility of 353.9%, an IV rank of 100 out of 100 over the past year. This page breaks down ERII'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 Jul 10, 2026, 8:00 PM ET · OPRA data 15 minutes delayed · For information only — not investment advice.
Implied Volatility & Expected Move
ERII 30-day at-the-money implied volatility, past year.
| ATM IV — front expiration | 353.9% |
| ATM IV — 2 month | 81.3% |
| IV rank (1 year) | 100 / 100 |
| IV percentile (1 year) | 99% |
| Expected move (front expiration) | ±$4.26 (±49.0%) |
| Historical volatility — 10 day | 70.6% |
| Historical volatility — 21 day | 113.4% |
| Historical volatility — 30 day | 122.5% |
| Historical volatility — 60 day | 97.9% |
| IV / HV ratio | 2.89 |
| Term slope (front − 3M) | +272.6 pts |
| 25Δ skew (front) | -73.6 pts |
An IV rank of 100 places current implied volatility near the top of its 52-week range. With an IV/HV ratio of 2.89, options currently price in more movement than the stock has recently realized. The term structure is in backwardation — front-month IV exceeds 3-month IV, a pattern often seen around near-term events.
ERII IV Rank History
ERII IV rank (0–100), past year.
IV rank has risen from 26 in Feb '26 to 100 today. An IV percentile of 99% means implied volatility was lower than today on 99% of trading days in the past year.
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ERII Options FAQ
What is the implied volatility of ERII options?
ERII options trade at a 30-day at-the-money implied volatility of 353.9% as of Jul 10, 2026. That is an IV rank of 100 out of 100, meaning implied volatility is elevated relative to its own 52-week range.
Is ERII implied volatility high or low right now?
By its own 52-week standards, ERII implied volatility is currently high: IV rank is 100 out of 100 as of Jul 10, 2026. Compared with realized movement, the IV/HV ratio of 2.89 shows options pricing more movement than the stock has recently delivered.
What move do ERII options imply before the next expiration?
Front-expiration ERII options imply a one-standard-deviation move of ±$4.26 (±49.0%) as of Jul 10, 2026, derived from at-the-money option prices.
What is the difference between ERII's IV rank and IV percentile?
IV rank (currently 100) measures where today's implied volatility sits between its 52-week low and high. IV percentile (currently 99%) 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.