How are MBX bear put spread max profit and max loss calculated?

Max profit equals strike width minus net debit times 100; max loss equals net debit times 100. Breakeven is long-put strike minus net debit. For the MBX bear put spread priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 73.70%), the computed maximum profit is $225.00 per contract and the computed maximum loss is -$275.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a MBX bear put spread?

The breakeven for the MBX bear put spread priced on this page is roughly $67.25 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 MBX market-implied 1-standard-deviation expected move in the same options snapshot is approximately 21.13%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current MBX implied volatility affect this bear put spread?

MBX ATM IV is at 73.70% with IV rank near 1.07%, 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.

MBX Bear Put Spread Strategy

MBX (MBX Biosciences, Inc. Common Stock), in the Healthcare sector, (Biotechnology industry), listed on NASDAQ.

MBX Biosciences, Inc. is a biopharmaceutical company in its clinical development phase, dedicated to pioneering precise peptide-based therapies for endocrine and metabolic conditions. Its most advanced drug candidate, MBX 2109, is a parathyroid hormone peptide prodrug currently in Phase 2 clinical trials. This medication is being evaluated as a long-duration hormone replacement treatment for individuals suffering from chronic hypoparathyroidism. The company is also progressing with MBX 1416, a prolonged-action glucagon-like peptide-1 (GLP-1) receptor antagonist, which is undergoing Phase 1 clinical assessment. The aim of this therapy is to address post-bariatric hypoglycemia, a persistent complication often seen after weight-loss surgery. Furthermore, MBX Biosciences is developing MBX 4291, a key candidate for obesity treatment.

MBX (MBX Biosciences, Inc. Common Stock) trades in the Healthcare sector, specifically Biotechnology, with a market capitalization of approximately $3.26B, a beta of 0.10 versus the broader market, a 52-week range of 9.63-72.64, average daily share volume of 723K, a public-listing history dating back to 2024, approximately 63 full-time employees. These structural characteristics shape how MBX stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 0.10 indicates MBX has historically moved less than the broader market, dampening realized volatility and producing tighter expected-move bands per unit of dollar exposure.

What is a bear put spread on MBX?

A bear put spread buys an at-the-money put and sells an out-of-the-money put at a lower strike for defined risk and defined reward bounded by the strike width.

MBX snapshot

As of August 14, 2026, spot at $68.17, ATM IV 73.70%, IV rank 1.07%, expected move 21.13%. The bear put spread on MBX 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 63-day expiry.

Why this bear put spread structure on MBX specifically: MBX IV at 73.70% is on the cheap side of its 1-year range, which favors premium-buying structures like a MBX bear put spread, with a market-implied 1-standard-deviation move of approximately 21.13% (roughly $14.40 on the underlying). The 63-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated MBX expiries trade a higher absolute premium for lower per-day decay. Position sizing on MBX should anchor to the underlying notional of $68.17 per share and to the trader's directional view on MBX stock.

MBX bear put spread setup

The MBX bear put spread 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 MBX at $68.17 on that close, the first option leg uses a $70.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed MBX chain at a 63-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 MBX shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Put	$70.00	$9.75
Sell 1	Put	$65.00	$7.00

MBX bear put spread risk and reward

Net Premium / Debit: -$275.00
Max Profit (per contract): $225.00
Max Loss (per contract): -$275.00
Breakeven(s): $67.25
Risk / Reward Ratio: 0.818

Max profit equals strike width minus net debit times 100; max loss equals net debit times 100. Breakeven is long-put strike minus net debit.

MBX bear put spread payoff curve

Modeled P&L at expiration across a range of underlying prices for the bear put spread on MBX. 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.

P&L at expiration across the modeled underlying-price range. Green shading marks profitable regions, red shading marks loss regions. Dotted purple verticals mark breakevens; the solid dark vertical marks current spot.

Underlying Price	% From Spot	P&L at Expiration
$0.01	-100.0%	+$225.00
$15.08	-77.9%	+$225.00
$30.15	-55.8%	+$225.00
$45.22	-33.7%	+$225.00
$60.30	-11.5%	+$225.00
$75.37	+10.6%	-$275.00
$90.44	+32.7%	-$275.00
$105.51	+54.8%	-$275.00
$120.58	+76.9%	-$275.00
$135.65	+99.0%	-$275.00

When traders use bear put spread on MBX

Bear put spreads on MBX reduce the cost of a bearish MBX stock position by selling a lower-strike put; suited to moderate-decline theses where price reaches but does not vastly exceed the short strike.

MBX thesis for this bear put spread

The market-implied 1-standard-deviation range for MBX extends from approximately $53.77 on the downside to $82.57 on the upside. A MBX bear put spread caps both the risk and the reward of a bearish position; relative to an outright long put on MBX, the spread reduces the cost basis but limits the maximum profit to the strike width minus net debit. Current MBX IV rank near 1.07% 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 MBX at 73.70%. As a Healthcare name, MBX options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to MBX-specific events.

MBX bear put spread positions are structurally moderately 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. MBX positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move MBX alongside the broader basket even when MBX-specific fundamentals are unchanged. Long-premium structures like a bear put spread on MBX 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 MBX chain quotes before placing a trade.

Frequently asked questions

What is a bear put spread on MBX?: A bear put spread on MBX is the bear put spread strategy applied to MBX (stock). The strategy is structurally moderately bearish: A bear put spread buys an at-the-money put and sells an out-of-the-money put at a lower strike for defined risk and defined reward bounded by the strike width. With MBX stock at $68.17 on the August 14, 2026 close, the strikes shown on this page are snapped to the nearest listed MBX chain strike and the premiums come straight from that session's bid/ask midpoint.
How are MBX bear put spread max profit and max loss calculated?: Max profit equals strike width minus net debit times 100; max loss equals net debit times 100. Breakeven is long-put strike minus net debit. For the MBX bear put spread priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 73.70%), the computed maximum profit is $225.00 per contract and the computed maximum loss is -$275.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a MBX bear put spread?: The breakeven for the MBX bear put spread priced on this page is roughly $67.25 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 MBX market-implied 1-standard-deviation expected move in the same options snapshot is approximately 21.13%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a bear put spread on MBX?: Bear put spreads on MBX reduce the cost of a bearish MBX stock position by selling a lower-strike put; suited to moderate-decline theses where price reaches but does not vastly exceed the short strike.
How does current MBX implied volatility affect this bear put spread?: MBX ATM IV is at 73.70% with IV rank near 1.07%, 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.