MUB · iShares National Muni Bond ETF ETF

Alerts for MUB

$104.03 +0.03 (+0.03%) At close · Sep 4

Options Chain

Underlying $104.03 · at close Sep 4, 2026 Options Calculator

Positioning

Sep 18, 2026 · 13 days to expiry · 58 contracts · mixed daily-bar sessions · Jul 23, 2026–Sep 4, 2026; 44 unknown

Put / call OI

0.94

Balanced positioning

Open interest

20,951

as of Sep 3, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$105.00

$0.97 above spot

ATM implied vol

17.4%

market's expected move

Open interest by strike · near the money

Calls Puts

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 13d Oct 16 41d Nov 20 76d Jan 15 132d Feb 19 167d Jan 21 503d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
2	2	41.3%	0.932	$9.60	$13.20	$12.45		—	$0.00	$0.05	—	—	—	—
Call · $93 In the money Daily-bar session Jul 23, 2026 Quote as of 2026-09-04 19:59:59.286 UTC Last $12.45 Breakeven $105.45 Implied vol 41.3% Delta 0.932 ≈93% ITM Gamma 0.016 Theta -0.049 Vega 0.026 Open interest 2 OI effective date Sep 3, 2026 Model this call Put · $93 Daily-bar session Unknown Quote as of 2026-09-04 14:18:31.717 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	34%	0.949	$9.90	$10.70	—		—	$0.00	$0.10	—	—	—	—
Call · $94 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.005 UTC Last — Breakeven — Implied vol 34% Delta 0.949 ≈95% ITM Gamma 0.016 Theta -0.036 Vega 0.021 Open interest — OI effective date — Model this call Put · $94 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	25.1%	0.975	$8.90	$9.50	—		—	$0.00	$0.10	—	—	—	—
Call · $95 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:27.356 UTC Last — Breakeven — Implied vol 25.1% Delta 0.975 ≈98% ITM Gamma 0.012 Theta -0.02 Vega 0.011 Open interest — OI effective date — Model this call Put · $95 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	25.9%	0.955	$7.90	$8.60	—		—	$0.00	$0.10	—	—	—	—
Call · $96 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:02.295 UTC Last — Breakeven — Implied vol 25.9% Delta 0.955 ≈96% ITM Gamma 0.019 Theta -0.028 Vega 0.019 Open interest — OI effective date — Model this call Put · $96 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	23.1%	0.951	$6.90	$7.60	—		—	$0.00	$0.10	—	—	—	—
Call · $97 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:02.155 UTC Last — Breakeven — Implied vol 23.1% Delta 0.951 ≈95% ITM Gamma 0.022 Theta -0.027 Vega 0.02 Open interest — OI effective date — Model this call Put · $97 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	24.2%	0.913	$5.90	$6.80	—		—	$0.00	$0.10	—	—	—	—
Call · $98 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:02.051 UTC Last — Breakeven — Implied vol 24.2% Delta 0.913 ≈91% ITM Gamma 0.033 Theta -0.038 Vega 0.031 Open interest — OI effective date — Model this call Put · $98 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	19.5%	0.92	$4.80	$5.80	—		—	$0.00	$0.10	—	—	—	—
Call · $99 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.299 UTC Last — Breakeven — Implied vol 19.5% Delta 0.92 ≈92% ITM Gamma 0.039 Theta -0.031 Vega 0.029 Open interest — OI effective date — Model this call Put · $99 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	19.2%	0.874	$3.90	$4.90	—		—	$0.00	$0.10	—	—	—	—
Call · $100 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.305 UTC Last — Breakeven — Implied vol 19.2% Delta 0.874 ≈87% ITM Gamma 0.055 Theta -0.039 Vega 0.041 Open interest — OI effective date — Model this call Put · $100 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	12.7%	0.904	$2.95	$3.60	—		$0.08	$0.00	$0.10	—	—	4	4
Call · $101 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.314 UTC Last — Breakeven — Implied vol 12.7% Delta 0.904 ≈90% ITM Gamma 0.069 Theta -0.025 Vega 0.034 Open interest — OI effective date — Model this call Put · $101 Daily-bar session Aug 20, 2026 Quote as of 2026-09-04 19:59:57.318 UTC Last $0.08 Breakeven $100.92 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 OI effective date Sep 3, 2026 Model this put
—	—	11.3%	0.841	$1.95	$2.75	—		$0.10	$0.00	$0.10	—	—	4	20
Call · $102 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.314 UTC Last — Breakeven — Implied vol 11.3% Delta 0.841 ≈84% ITM Gamma 0.11 Theta -0.029 Vega 0.048 Open interest — OI effective date — Model this call Put · $102 Daily-bar session Jul 29, 2026 Quote as of 2026-09-04 19:59:59.277 UTC Last $0.10 Breakeven $101.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 20 OI effective date Sep 3, 2026 Model this put
40	20	—	—	$0.05	$1.85	$1.25		$0.10	$0.00	$0.15	—	—	2	15
Call · $103 In the money Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:59:26.494 UTC Last $1.25 Breakeven $104.25 Implied vol — Delta — Gamma — Theta — Vega — Open interest 40 OI effective date Sep 3, 2026 Model this call Put · $103 Daily-bar session Sep 2, 2026 Quote as of 2026-09-04 19:55:29.690 UTC Last $0.10 Breakeven $102.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 15 OI effective date Sep 3, 2026 Model this put
—	20	—	—	$0.00	$1.60	$2.00		$0.15	$0.00	$0.40	—	—	1	77
Call · $104 In the money Daily-bar session Jul 28, 2026 Quote as of 2026-09-04 19:59:59.287 UTC Last $2.00 Breakeven $106.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $104 Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 19:58:37.252 UTC Last $0.15 Breakeven $103.85 Implied vol — Delta — Gamma — Theta — Vega — Open interest 77 OI effective date Sep 3, 2026 Model this put
Underlying $104.03
923	2	—	—	$0.00	$0.15	$0.11		$0.75	$0.85	$2.80	-0.59	17.4%	2	10k
Call · $105 Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 19:59:59.286 UTC Last $0.11 Breakeven $105.11 Implied vol — Delta — Gamma — Theta — Vega — Open interest 923 OI effective date Sep 3, 2026 Model this call Put · $105 In the money Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 19:59:59.286 UTC Last $0.75 Breakeven $104.25 Implied vol 17.4% Delta -0.59 ≈59% ITM Gamma 0.114 Theta -0.045 Vega 0.076 Open interest 10k OI effective date Sep 3, 2026 Model this put
9.8k	1	—	—	$0.00	$0.05	$0.03		$1.79	$1.80	$2.15	-0.845	9%	4	33
Call · $106 Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 13:30:58.554 UTC Last $0.03 Breakeven $106.03 Implied vol — Delta — Gamma — Theta — Vega — Open interest 9.8k OI effective date Sep 3, 2026 Model this call Put · $106 In the money Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 19:59:59.286 UTC Last $1.79 Breakeven $104.21 Implied vol 9% Delta -0.845 ≈84% ITM Gamma 0.134 Theta -0.007 Vega 0.047 Open interest 33 OI effective date Sep 3, 2026 Model this put
12	2	—	—	$0.00	$0.10	$0.06		$2.92	$2.75	$3.20	-0.877	12.2%	1	5
Call · $107 Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 19:59:59.277 UTC Last $0.06 Breakeven $107.06 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 OI effective date Sep 3, 2026 Model this call Put · $107 In the money Daily-bar session Sep 3, 2026 Quote as of 2026-09-04 19:55:03.131 UTC Last $2.92 Breakeven $104.08 Implied vol 12.2% Delta -0.877 ≈88% ITM Gamma 0.085 Theta -0.009 Vega 0.04 Open interest 5 OI effective date Sep 3, 2026 Model this put
—	—	—	—	$0.00	$0.10	—		—	$3.70	$4.20	-0.907	14.3%	—	—
Call · $108 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $108 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.298 UTC Last — Breakeven — Implied vol 14.3% Delta -0.907 ≈91% ITM Gamma 0.059 Theta -0.008 Vega 0.033 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$4.70	$5.20	-0.919	17%	—	—
Call · $109 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $109 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.296 UTC Last — Breakeven — Implied vol 17% Delta -0.919 ≈92% ITM Gamma 0.045 Theta -0.009 Vega 0.03 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$5.70	$6.20	-0.927	19.6%	—	—
Call · $110 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $110 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.298 UTC Last — Breakeven — Implied vol 19.6% Delta -0.927 ≈93% ITM Gamma 0.036 Theta -0.01 Vega 0.027 Open interest — OI effective date — Model this put
3	3	—	—	$0.00	$0.10	$0.05		—	$6.70	$7.20	-0.934	22.1%	—	—
Call · $111 Daily-bar session Aug 17, 2026 Quote as of 2026-09-04 19:59:57.318 UTC Last $0.05 Breakeven $111.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 OI effective date Sep 3, 2026 Model this call Put · $111 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:57:52.129 UTC Last — Breakeven — Implied vol 22.1% Delta -0.934 ≈93% ITM Gamma 0.03 Theta -0.011 Vega 0.025 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$7.70	$8.20	-0.939	24.5%	—	—
Call · $112 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $112 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:27.356 UTC Last — Breakeven — Implied vol 24.5% Delta -0.939 ≈94% ITM Gamma 0.025 Theta -0.012 Vega 0.024 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$8.70	$9.30	-0.928	28.9%	—	—
Call · $113 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.286 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $113 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:02.330 UTC Last — Breakeven — Implied vol 28.9% Delta -0.928 ≈93% ITM Gamma 0.024 Theta -0.019 Vega 0.027 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$9.70	$10.20	-0.946	29.2%	—	—
Call · $114 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $114 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:27.356 UTC Last — Breakeven — Implied vol 29.2% Delta -0.946 ≈95% ITM Gamma 0.019 Theta -0.013 Vega 0.022 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$10.70	$11.20	-0.949	31.5%	—	—
Call · $115 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $115 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:58:21.468 UTC Last — Breakeven — Implied vol 31.5% Delta -0.949 ≈95% ITM Gamma 0.017 Theta -0.014 Vega 0.021 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$11.70	$12.20	-0.951	33.7%	—	—
Call · $116 Daily-bar session Unknown Quote as of 2026-09-04 19:59:57.318 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $116 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:43:22.293 UTC Last — Breakeven — Implied vol 33.7% Delta -0.951 ≈95% ITM Gamma 0.015 Theta -0.015 Vega 0.02 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$12.70	$13.20	-0.954	35.9%	—	—
Call · $117 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.286 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $117 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:27.356 UTC Last — Breakeven — Implied vol 35.9% Delta -0.954 ≈95% ITM Gamma 0.014 Theta -0.015 Vega 0.019 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$13.70	$14.20	-0.955	38.1%	—	—
Call · $118 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.286 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $118 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:03.437 UTC Last — Breakeven — Implied vol 38.1% Delta -0.955 ≈96% ITM Gamma 0.013 Theta -0.016 Vega 0.019 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$14.70	$15.20	-0.957	40.2%	—	—
Call · $119 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.286 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $119 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:03.778 UTC Last — Breakeven — Implied vol 40.2% Delta -0.957 ≈96% ITM Gamma 0.012 Theta -0.016 Vega 0.018 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$15.70	$16.20	-0.959	42.3%	—	—
Call · $120 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.285 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $120 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:02.993 UTC Last — Breakeven — Implied vol 42.3% Delta -0.959 ≈96% ITM Gamma 0.011 Theta -0.017 Vega 0.017 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$16.70	$17.20	-0.96	44.4%	—	—
Call · $121 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.286 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $121 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:02.993 UTC Last — Breakeven — Implied vol 44.4% Delta -0.96 ≈96% ITM Gamma 0.01 Theta -0.017 Vega 0.017 Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Jul 23, 2026–Sep 4, 2026; 44 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. The 24 strikes around the money are shown by default — switch to "All 29" for the wings. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.