Energy Recovery (ERII) options traded 2,024 contracts on November 4, 2026 (24 calls and 2,000 puts, a put/call ratio of 83.33), compared with a 30-day average of 82. Options price a move of about ±4.5% by the nearest expiration.

Key numbers

30-day implied volatility (IV30): 62.9%
Implied move by the nearest expiration: ±4.5%
Option volume: 2,024 contracts (24 calls, 2,000 puts); 30-day average 82

Data as of November 4, 2026.

ERII Option Breakdown

A breakdown of key statistics for each option expiration listed for ERII. View implied volatility, volatility skew, volume, open interest, straddle premiums, and liquidity -- including bid/ask spread and NBBO bid/ask sizes. Includes links to the option chain, as well as numerous detailed charts.

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