STE Butterfly Strategy
STE (STERIS plc), in the Healthcare sector, (Medical - Specialties industry), listed on NYSE.
STERIS plc provides infection prevention products and services in the United States, Ireland, and internationally. The company operates through three segments: Healthcare, Applied Sterilization Technologies, and Life Sciences. It offers a range of products including cleaning chemistries, sterility assurance products, automated endoscope reprocessing systems, surgical tables, lights, and connectivity solutions. It also provides services such as equipment maintenance, instrument repair, and contract sterilization for medical device and pharmaceutical manufacturers.
STE (STERIS plc) trades in the Healthcare sector, specifically Medical - Specialties, with a market capitalization of approximately $22.73B, a trailing P/E of 28.28, a beta of 0.91 versus the broader market, a 52-week range of 195.14-269.44, average daily share volume of 787K, a public-listing history dating back to 1992, approximately 18K full-time employees. These structural characteristics shape how STE stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 0.91 places STE roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. STE pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.
What is a butterfly on STE?
A long call butterfly buys one lower-strike call, sells two ATM calls, and buys one higher-strike call, paying a small net debit for a defined-risk position that maxes out if the underlying pins the middle strike at expiration.
STE snapshot
As of August 14, 2026, spot at $233.12, ATM IV 22.70%, IV rank 4.35%, expected move 6.51%. The butterfly on STE below is built from the August 14, 2026 end-of-day chain, with strikes snapped to listed contracts and premiums pulled from the bid/ask midpoint at a 35-day expiry.
Why this butterfly structure on STE specifically: STE IV at 22.70% is on the cheap side of its 1-year range, which favors premium-buying structures like a STE butterfly, with a market-implied 1-standard-deviation move of approximately 6.51% (roughly $15.17 on the underlying). The 35-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated STE expiries trade a higher absolute premium for lower per-day decay. Position sizing on STE should anchor to the underlying notional of $233.12 per share and to the trader's directional view on STE stock.
STE butterfly setup
The STE butterfly below is built from the August 14, 2026 end-of-day chain, with each option leg priced at the bid/ask midpoint of its listed strike. With STE at $233.12 on that close, the first option leg uses a $220.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed STE chain at a 35-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 STE shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $220.00 | $15.95 |
| Sell 2 | Call | $230.00 | $8.40 |
| Buy 1 | Call | $240.00 | $3.30 |
STE butterfly risk and reward
- Net Premium / Debit
- -$245.00
- Max Profit (per contract)
- $716.07
- Max Loss (per contract)
- -$245.00
- Breakeven(s)
- $222.45, $237.55
- Risk / Reward Ratio
- 2.923
Max profit equals the wing width minus net debit times 100 (reached when the underlying pins the middle strike); max loss equals the net debit times 100. Two breakevens at lower-wing plus debit and upper-wing minus debit.
STE butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on STE. 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% | -$245.00 |
| $51.55 | -77.9% | -$245.00 |
| $103.10 | -55.8% | -$245.00 |
| $154.64 | -33.7% | -$245.00 |
| $206.18 | -11.6% | -$245.00 |
| $257.73 | +10.6% | -$245.00 |
| $309.27 | +32.7% | -$245.00 |
| $360.81 | +54.8% | -$245.00 |
| $412.35 | +76.9% | -$245.00 |
| $463.90 | +99.0% | -$245.00 |
When traders use butterfly on STE
Butterflies on STE are pinning bets - traders use them when they expect STE to settle near a specific level at expiration (often the prior close, a round number, or the max-pain strike) and want defined-risk exposure to that outcome.
STE thesis for this butterfly
The market-implied 1-standard-deviation range for STE extends from approximately $217.95 on the downside to $248.29 on the upside. A STE long call butterfly is a pinning play: it pays maximum at the middle strike if STE settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current STE IV rank near 4.35% 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 STE at 22.70%. As a Healthcare name, STE options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to STE-specific events.
STE butterfly positions are structurally neutral / pin (limited-risk, limited-reward); 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. STE positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move STE alongside the broader basket even when STE-specific fundamentals are unchanged. Always rebuild the position from current STE chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on STE?
- A butterfly on STE is the butterfly strategy applied to STE (stock). The strategy is structurally neutral / pin (limited-risk, limited-reward): A long call butterfly buys one lower-strike call, sells two ATM calls, and buys one higher-strike call, paying a small net debit for a defined-risk position that maxes out if the underlying pins the middle strike at expiration. With STE stock at $233.12 on the August 14, 2026 close, the strikes shown on this page are snapped to the nearest listed STE chain strike and the premiums come straight from that session's bid/ask midpoint.
- How are STE butterfly max profit and max loss calculated?
- Max profit equals the wing width minus net debit times 100 (reached when the underlying pins the middle strike); max loss equals the net debit times 100. Two breakevens at lower-wing plus debit and upper-wing minus debit. For the STE butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 22.70%), the computed maximum profit is $716.07 per contract and the computed maximum loss is -$245.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
- What is the breakeven for a STE butterfly?
- The breakeven for the STE butterfly priced on this page is roughly $222.45 and $237.55 at expiration, derived from the August 14, 2026 end-of-day chain's premiums. Breakeven is the underlying price at which the strategy's P&L crosses zero ignoring transaction costs and assignment risk. The STE market-implied 1-standard-deviation expected move in the same options snapshot is approximately 6.51%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on STE?
- Butterflies on STE are pinning bets - traders use them when they expect STE to settle near a specific level at expiration (often the prior close, a round number, or the max-pain strike) and want defined-risk exposure to that outcome.
- How does current STE implied volatility affect this butterfly?
- STE ATM IV is at 22.70% with IV rank near 4.35%, 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.