REPLIGEN CORP (RGEN) Options Volume
172 REPLIGEN CORP (RGEN) option contracts changed hands in the latest session, at a put/call volume ratio of 0.04. This page tracks how actively RGEN options trade — contracts and dollars — and flags individual contracts running far above their own 30-day average volume.
Data as of Oct 9, 2026, 3:55 PM ET · OPRA data 15 minutes delayed · For information only — not investment advice.
Options Volume & Premium Flow
| Total options volume | 172 |
| Call volume | 165 |
| Put volume | 7 |
| Put/call volume ratio | 0.04 |
| Listed contracts | 460 |
| Call premium traded | $173.03K |
| Put premium traded | $3.84K |
| Premium put/call ratio | 0.02 |
| Open interest rank (31 day) | 95 / 100 |
| Skew rank (31 day) | 64 / 100 |
RGEN Options Volume Trend
RGEN total options volume per session, past year.
RGEN put/call volume ratio, past year.
RGEN Unusual Options Activity
No RGEN contract currently trades at 3× its 30-day average volume with at least 500 contracts — nothing clears OptiView's unusual-activity bar today.
With a put/call volume ratio of 0.04, today's trading is tilted toward calls. Measured in dollars rather than contracts, $173.03K of call premium and $3.84K of put premium changed hands — the larger premium flow is on the call side.
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RGEN Options FAQ
How many RGEN options traded today?
172 RGEN option contracts traded as of Oct 9, 2026 — 165 calls and 7 puts.
Is there unusual options activity in RGEN today?
No RGEN contract currently clears OptiView's unusual-activity bar as of Oct 9, 2026, which requires at least 3× the contract's 30-day average volume and 500 contracts traded.
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.