RGEN Long Put Strategy
RGEN (Repligen Corporation), in the Healthcare sector, (Medical - Instruments & Supplies industry), listed on NASDAQ.
Repligen Corporation specializes in the creation and distribution of advanced bioprocessing technologies and integrated systems. These solutions are vital for various stages of biological drug production, serving clients across North America, Europe, the Asia Pacific region, and other international markets. The company's diverse product portfolio includes crucial components for biomanufacturing. This encompasses Protein A ligands, which serve as the key binding elements within Protein A affinity chromatography resins, as well as specialized cell culture growth factors. In the realm of chromatography, Repligen offers a range of products: Its OPUS line features pre-packed chromatography columns, instrumental in purifying biologics, alongside smaller-scale OPUS columns designed for high-throughput process development screening, viral clearance validation studies, and the scaling-down of chromatography processes. Additionally, the company supplies ELISA test kits and chromatography resins marketed under the CaptivA brand.
RGEN (Repligen Corporation) trades in the Healthcare sector, specifically Medical - Instruments & Supplies, with a market capitalization of approximately $8.29B, a trailing P/E of 161.19, a beta of 1.08 versus the broader market, a 52-week range of 100.99-175.77, average daily share volume of 1.1M, a public-listing history dating back to 1986, approximately 2K full-time employees. These structural characteristics shape how RGEN stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 1.08 places RGEN roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. The trailing P/E of 161.19 is on the rich side, which tends to correlate with higher earnings-window IV expansion as the market debates whether forward growth supports the multiple.
What is a long put on RGEN?
A long put buys downside exposure with a fixed maximum loss equal to the premium paid; profit accrues if the underlying closes below the strike minus premium at expiration.
Current RGEN snapshot
As of June 30, 2026, spot at $136.87, ATM IV 54.30%, IV rank 4.63%, expected move 15.57%. The long put on RGEN below is built from the same end-of-day chain, with strikes snapped to listed contracts and premiums pulled from the bid/ask midpoint at a 17-day expiry.
Why this long put structure on RGEN specifically: RGEN IV at 54.30% is on the cheap side of its 1-year range, which favors premium-buying structures like a RGEN long put, with a market-implied 1-standard-deviation move of approximately 15.57% (roughly $21.31 on the underlying). The 17-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated RGEN expiries trade a higher absolute premium for lower per-day decay. Position sizing on RGEN should anchor to the underlying notional of $136.87 per share and to the trader's directional view on RGEN stock.
RGEN long put setup
The RGEN long put below is built from the end-of-day chain, with each option leg priced at the bid/ask midpoint of its listed strike. With RGEN near $136.87, the first option leg uses a $135.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed RGEN chain at a 17-day expiry; the cross-strike IV skew is reflected directly in the per-leg values rather than approximated. Quantity sizing assumes one contract per option leg (or 100 RGEN shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Put | $135.00 | $5.40 |
RGEN long put risk and reward
- Net Premium / Debit
- -$540.00
- Max Profit (per contract)
- $12,959.00
- Max Loss (per contract)
- -$540.00
- Breakeven(s)
- $129.60
- Risk / Reward Ratio
- 23.998
Max profit equals the strike minus premium times 100 (reached at zero); max loss equals the premium times 100. Breakeven is strike minus premium.
RGEN long put payoff curve
Modeled P&L at expiration across a range of underlying prices for the long put on RGEN. Each row is one sampled price point from the computed payoff curve; the full curve uses 200 price points internally before being summarized into 10 rows here.
| Underlying Price | % From Spot | P&L at Expiration |
|---|---|---|
| $0.01 | -100.0% | +$12,959.00 |
| $30.27 | -77.9% | +$9,932.84 |
| $60.53 | -55.8% | +$6,906.68 |
| $90.79 | -33.7% | +$3,880.52 |
| $121.06 | -11.6% | +$854.36 |
| $151.32 | +10.6% | -$540.00 |
| $181.58 | +32.7% | -$540.00 |
| $211.84 | +54.8% | -$540.00 |
| $242.10 | +76.9% | -$540.00 |
| $272.36 | +99.0% | -$540.00 |
When traders use long put on RGEN
Long puts on RGEN hedge an existing long RGEN stock position or express a bearish view with defined risk; position sizing typically scales the put notional to the underlying RGEN exposure being hedged.
RGEN thesis for this long put
The market-implied 1-standard-deviation range for RGEN extends from approximately $115.56 on the downside to $158.18 on the upside. A RGEN long put expresses a directional view that the underlying closes below the strike minus premium at expiration, frequently sized to hedge an existing long RGEN position with one put per 100 shares held. Current RGEN IV rank near 4.63% sits in the lower third of its 1-year distribution, where IV often re-expands toward the mean; this favors premium-buying structures and disadvantages premium-selling structures on RGEN at 54.30%. As a Healthcare name, RGEN options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to RGEN-specific events.
RGEN long put positions are structurally bearish; the modeled P&L assumes European-style exercise at expiration and ignores early assignment, transaction costs, dividends paid before expiry on the stock leg (when present), and the bid-ask spread on the listed chain. RGEN positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move RGEN alongside the broader basket even when RGEN-specific fundamentals are unchanged. Long-premium structures like a long put on RGEN are particularly exposed to IV-crush risk through scheduled events (earnings, FDA decisions, central-bank meetings) where IV typically contracts post-event regardless of the directional outcome. Always rebuild the position from current RGEN chain quotes before placing a trade.
Frequently asked questions
- What is a long put on RGEN?
- A long put on RGEN is the long put strategy applied to RGEN (stock). The strategy is structurally bearish: A long put buys downside exposure with a fixed maximum loss equal to the premium paid; profit accrues if the underlying closes below the strike minus premium at expiration. With RGEN stock trading near $136.87, the strikes shown on this page are snapped to the nearest listed RGEN chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are RGEN long put max profit and max loss calculated?
- Max profit equals the strike minus premium times 100 (reached at zero); max loss equals the premium times 100. Breakeven is strike minus premium. For the RGEN long put priced from the end-of-day chain at a 30-day expiry (ATM IV 54.30%), the computed maximum profit is $12,959.00 per contract and the computed maximum loss is -$540.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
- What is the breakeven for a RGEN long put?
- The breakeven for the RGEN long put priced on this page is roughly $129.60 at expiration, derived from end-of-day chain premiums. Breakeven is the underlying price at which the strategy's P&L crosses zero ignoring transaction costs and assignment risk. The current RGEN market-implied 1-standard-deviation expected move is approximately 15.57%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a long put on RGEN?
- Long puts on RGEN hedge an existing long RGEN stock position or express a bearish view with defined risk; position sizing typically scales the put notional to the underlying RGEN exposure being hedged.
- How does current RGEN implied volatility affect this long put?
- RGEN ATM IV is at 54.30% with IV rank near 4.63%, which is on the low end of its 1-year range. Premium-buying structures (long call, long put, debit spreads) are relatively cheap in this regime; premium-selling structures collect less credit per unit risk.