GOVZ · iShares 25+ Year Treasury STRIPS Bond ETF ETF

Alerts for GOVZ

$33.74 +0.17 (+0.51%) At close · Sep 4

Options Chain

Underlying $33.74 · at close Sep 4, 2026 Options Calculator

Positioning

Sep 18, 2026 · 13 days to expiry · 22 contracts · mixed daily-bar sessions · Aug 24, 2026–Aug 27, 2026; 19 unknown

Put / call OI

0.04

Call-heavy positioning

Open interest

as of Sep 3, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$34.00

$0.26 above spot

ATM implied vol

13.8%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 13d Oct 16 41d Nov 20 76d Feb 19 167d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	47.3%	0.916	$2.60	$5.20	—		—	$0.00	$1.25	—	—	—	—
Call · $30 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.238 UTC Last — Breakeven — Implied vol 47.3% Delta 0.916 ≈92% ITM Gamma 0.051 Theta -0.021 Vega 0.01 Open interest — OI effective date — Model this call Put · $30 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.631 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	37.1%	0.897	$1.60	$4.20	—		$0.05	$0.00	$1.25	—	—	1	1
Call · $31 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.242 UTC Last — Breakeven — Implied vol 37.1% Delta 0.897 ≈90% ITM Gamma 0.076 Theta -0.019 Vega 0.011 Open interest — OI effective date — Model this call Put · $31 Daily-bar session Aug 27, 2026 Quote as of 2026-09-04 19:59:32.512 UTC Last $0.05 Breakeven $30.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 3, 2026 Model this put
—	—	28.4%	0.851	$0.65	$3.20	—		—	$0.00	$1.25	—	—	—	—
Call · $32 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:36.731 UTC Last — Breakeven — Implied vol 28.4% Delta 0.851 ≈85% ITM Gamma 0.129 Theta -0.019 Vega 0.015 Open interest — OI effective date — Model this call Put · $32 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.412 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$2.15	—		—	$0.00	$1.35	—	—	—	—
Call · $33 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.349 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $33 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.311 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
Underlying $33.74
6	8	—	—	$0.00	$1.50	$0.40		—	$0.00	$1.75	—	—	—	—
Call · $34 Daily-bar session Aug 24, 2026 Quote as of 2026-09-04 19:59:32.283 UTC Last $0.40 Breakeven $34.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 6 OI effective date Sep 3, 2026 Model this call Put · $34 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.291 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
20	20	—	—	$0.00	$1.30	$0.35		—	$0.05	$2.45	-0.911	13.8%	—	—
Call · $35 Daily-bar session Aug 27, 2026 Quote as of 2026-09-04 19:59:32.383 UTC Last $0.35 Breakeven $35.35 Implied vol — Delta — Gamma — Theta — Vega — Open interest 20 OI effective date Sep 3, 2026 Model this call Put · $35 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:40.344 UTC Last — Breakeven — Implied vol 13.8% Delta -0.911 ≈91% ITM Gamma 0.183 Theta -0.002 Vega 0.01 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$1.00	$3.40	—	—	—	—
Call · $36 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.483 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $36 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.614 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$2.00	$4.40	—	—	—	—
Call · $37 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.595 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $37 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.756 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$2.90	$5.40	—	—	—	—
Call · $38 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.714 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $38 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.916 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$3.90	$6.40	—	—	—	—
Call · $39 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.814 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $39 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:33.159 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$5.00	$7.50	-0.965	48.4%	—	—
Call · $40 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.895 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $40 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:33.318 UTC Last — Breakeven — Implied vol 48.4% Delta -0.965 ≈96% ITM Gamma 0.025 Theta -0.005 Vega 0.005 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 · Aug 24, 2026–Aug 27, 2026; 19 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. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.