MUB Butterfly Strategy
MUB (iShares National Muni Bond ETF), in the Financial Services sector, (Asset Management industry), listed on AMEX.
The iShares National Muni Bond ETF seeks to track the investment results of an index composed of investment-grade U.S. municipal bonds.
MUB (iShares National Muni Bond ETF) trades in the Financial Services sector, specifically Asset Management, with a market capitalization of approximately $43.66B, a beta of 0.90 versus the broader market, a 52-week range of 103.14-109, average daily share volume of 3.6M, a public-listing history dating back to 2007. These structural characteristics shape how MUB etf options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 0.90 places MUB roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. MUB pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.
What is a butterfly on MUB?
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 MUB snapshot
As of May 15, 2026, spot at $106.09, ATM IV 4.70%, IV rank 0.49%, expected move 1.35%. The butterfly on MUB 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 MUB specifically: MUB IV at 4.70% is on the cheap side of its 1-year range, which favors premium-buying structures like a MUB butterfly, with a market-implied 1-standard-deviation move of approximately 1.35% (roughly $1.43 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 MUB expiries trade a higher absolute premium for lower per-day decay. Position sizing on MUB should anchor to the underlying notional of $106.09 per share and to the trader's directional view on MUB etf.
MUB butterfly setup
The MUB 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 MUB near $106.09, the first option leg uses a $100.79 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed MUB 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 MUB shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $100.79 | N/A |
| Sell 2 | Call | $106.09 | N/A |
| Buy 1 | Call | $111.39 | N/A |
MUB butterfly risk and reward
- Net Premium / Debit
- N/A
- Max Profit (per contract)
- Unbounded
- Max Loss (per contract)
- Unbounded
- Breakeven(s)
- None on modeled curve
- Risk / Reward Ratio
- N/A
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.
MUB butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on MUB. 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.
When traders use butterfly on MUB
Butterflies on MUB are pinning bets - traders use them when they expect MUB 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.
MUB thesis for this butterfly
The market-implied 1-standard-deviation range for MUB extends from approximately $104.66 on the downside to $107.52 on the upside. A MUB long call butterfly is a pinning play: it pays maximum at the middle strike if MUB settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current MUB IV rank near 0.49% 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 MUB at 4.70%. As a Financial Services name, MUB options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to MUB-specific events.
MUB 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. MUB positions also carry Financial Services sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move MUB alongside the broader basket even when MUB-specific fundamentals are unchanged. Always rebuild the position from current MUB chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on MUB?
- A butterfly on MUB is the butterfly strategy applied to MUB (etf). 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 MUB etf trading near $106.09, the strikes shown on this page are snapped to the nearest listed MUB chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are MUB 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 MUB butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 4.70%), the computed maximum profit is unbounded per contract and the computed maximum loss is unbounded per contract. Live intraday quotes will differ as the chain moves through the trading session.
- What is the breakeven for a MUB butterfly?
- The breakeven for the MUB butterfly priced on this page is no defined breakeven on the modeled curve 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 MUB market-implied 1-standard-deviation expected move is approximately 1.35%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on MUB?
- Butterflies on MUB are pinning bets - traders use them when they expect MUB 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 MUB implied volatility affect this butterfly?
- MUB ATM IV is at 4.70% with IV rank near 0.49%, 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.