How are TNDM 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 TNDM butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 72.80%), the computed maximum profit is $50.00 per contract and the computed maximum loss is -$50.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a TNDM butterfly?

The breakeven for the TNDM butterfly priced on this page is roughly $12.50 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 TNDM market-implied 1-standard-deviation expected move is approximately 20.87%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current TNDM implied volatility affect this butterfly?

TNDM ATM IV is at 72.80% with IV rank near 19.86%, 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.

TNDM Butterfly Strategy

TNDM (Tandem Diabetes Care, Inc.), in the Healthcare sector, (Medical - Devices industry), listed on NASDAQ.

Tandem Diabetes Care, Inc., a medical device company, designs, develops, and commercializes various products for people with insulin-dependent diabetes in the United States and internationally. The company's flagship product is the t:slim X2 insulin delivery system, a pump platform that comprises t:slim X2 pump, its 300-unit disposable insulin cartridge, and an infusion set. It also provides t:slim X2 insulin with Basal-IQ and control IQ technology; t:slim X2 with G5 Integration; and Tandem Device Updater, a tool that allows users to update their pump's software. In addition, the company offers t:connect, a web-based data management application, which provides a visual way to display diabetes therapy management data from the pump, continuous glucose monitoring, and supported blood glucose meters for users, their caregivers, and their healthcare providers; and Sugarmate, a mobile app for people with diabetes who use insulin. It has development and commercialization agreements with Dexcom, Inc. and Abbott Laboratories. The company was formerly known as Phluid Inc. and changed its name to Tandem Diabetes Care, Inc. in January 2008.

TNDM (Tandem Diabetes Care, Inc.) trades in the Healthcare sector, specifically Medical - Devices, with a market capitalization of approximately $966.9M, a beta of 1.64 versus the broader market, a 52-week range of 9.98-29.65, average daily share volume of 2.4M, a public-listing history dating back to 2013, approximately 3K full-time employees. These structural characteristics shape how TNDM stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 1.64 indicates TNDM has historically moved more than the broader market, amplifying both the directional payoff and the realized volatility relative to an index-equivalent position.

What is a butterfly on TNDM?

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.

Current TNDM snapshot

As of May 15, 2026, spot at $12.59, ATM IV 72.80%, IV rank 19.86%, expected move 20.87%. The butterfly on TNDM 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 34-day expiry.

Why this butterfly structure on TNDM specifically: TNDM IV at 72.80% is on the cheap side of its 1-year range, which favors premium-buying structures like a TNDM butterfly, with a market-implied 1-standard-deviation move of approximately 20.87% (roughly $2.63 on the underlying). The 34-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated TNDM expiries trade a higher absolute premium for lower per-day decay. Position sizing on TNDM should anchor to the underlying notional of $12.59 per share and to the trader's directional view on TNDM stock.

TNDM butterfly setup

The TNDM butterfly below is built from the end-of-day chain, with each option leg priced at the bid/ask midpoint of its listed strike. With TNDM near $12.59, the first option leg uses a $12.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed TNDM chain at a 34-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 TNDM shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$12.00	$1.50
Sell 2	Call	$13.00	$1.00
Buy 1	Call	$13.00	$1.00

TNDM butterfly risk and reward

Net Premium / Debit: -$50.00
Max Profit (per contract): $50.00
Max Loss (per contract): -$50.00
Breakeven(s): $12.50
Risk / Reward Ratio: 1.000

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.

TNDM butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on TNDM. 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	-99.9%	-$50.00
$2.79	-77.8%	-$50.00
$5.58	-55.7%	-$50.00
$8.36	-33.6%	-$50.00
$11.14	-11.5%	-$50.00
$13.92	+10.6%	+$50.00
$16.71	+32.7%	+$50.00
$19.49	+54.8%	+$50.00
$22.27	+76.9%	+$50.00
$25.05	+99.0%	+$50.00

When traders use butterfly on TNDM

Butterflies on TNDM are pinning bets - traders use them when they expect TNDM 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.

TNDM thesis for this butterfly

The market-implied 1-standard-deviation range for TNDM extends from approximately $9.96 on the downside to $15.22 on the upside. A TNDM long call butterfly is a pinning play: it pays maximum at the middle strike if TNDM settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current TNDM IV rank near 19.86% 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 TNDM at 72.80%. As a Healthcare name, TNDM options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to TNDM-specific events.

TNDM 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. TNDM positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move TNDM alongside the broader basket even when TNDM-specific fundamentals are unchanged. Always rebuild the position from current TNDM chain quotes before placing a trade.

Frequently asked questions

What is a butterfly on TNDM?: A butterfly on TNDM is the butterfly strategy applied to TNDM (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 TNDM stock trading near $12.59, the strikes shown on this page are snapped to the nearest listed TNDM chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are TNDM 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 TNDM butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 72.80%), the computed maximum profit is $50.00 per contract and the computed maximum loss is -$50.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a TNDM butterfly?: The breakeven for the TNDM butterfly priced on this page is roughly $12.50 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 TNDM market-implied 1-standard-deviation expected move is approximately 20.87%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on TNDM?: Butterflies on TNDM are pinning bets - traders use them when they expect TNDM 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 TNDM implied volatility affect this butterfly?: TNDM ATM IV is at 72.80% with IV rank near 19.86%, 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.