BILS · State Street(R) SPDR(R) Bloomberg 3-12 Month T-Bill ETF ETF

Alerts for BILS

$99.19 +0.03 (+0.03%) At close · Sep 4

Options Chain

Underlying $99.19 · at close Sep 4, 2026 Options Calculator

Positioning

Sep 18, 2026 · 13 days to expiry · 38 contracts · mixed daily-bar sessions · Sep 4, 2026; 35 unknown

Put / call OI

—

No open interest

Open interest

as of Sep 3, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$102.00

$2.81 above spot

ATM implied vol

19.1%

market's expected move

Open interest by strike

Calls Puts

100

101

102

103

104

105

106

107

108

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 13d Oct 16 41d Jan 15 132d Apr 16 223d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$4.50	$13.90	—		—	$0.00	$4.30	—	—	—	—
Call · $90 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:09.809 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $90 Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.305 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$3.50	$12.90	—		—	$0.00	$4.30	—	—	—	—
Call · $91 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:09.183 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $91 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.801 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$2.55	$11.90	—		—	$0.00	$4.30	—	—	—	—
Call · $92 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.862 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $92 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.285 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$1.70	$10.90	—		—	$0.00	$4.30	—	—	—	—
Call · $93 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.536 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $93 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.725 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	22.5%	0.906	$1.10	$9.90	—		—	$0.00	$4.30	—	—	—	—
Call · $94 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.872 UTC Last — Breakeven — Implied vol 22.5% Delta 0.906 ≈91% ITM Gamma 0.04 Theta -0.036 Vega 0.031 Open interest — OI effective date — Model this call Put · $94 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.414 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	28.3%	0.805	$0.90	$8.90	—		—	$0.00	$4.30	—	—	—	—
Call · $95 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.192 UTC Last — Breakeven — Implied vol 28.3% Delta 0.805 ≈81% ITM Gamma 0.052 Theta -0.064 Vega 0.052 Open interest — OI effective date — Model this call Put · $95 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.807 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	26.7%	0.758	$0.20	$7.90	—		—	$0.00	$4.30	—	—	—	—
Call · $96 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:05.507 UTC Last — Breakeven — Implied vol 26.7% Delta 0.758 ≈76% ITM Gamma 0.062 Theta -0.067 Vega 0.059 Open interest — OI effective date — Model this call Put · $96 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.477 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	29.1%	0.677	$0.10	$6.90	—		—	$0.00	$4.30	—	—	—	—
Call · $97 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.093 UTC Last — Breakeven — Implied vol 29.1% Delta 0.677 ≈68% ITM Gamma 0.066 Theta -0.082 Vega 0.067 Open interest — OI effective date — Model this call Put · $97 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.140 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$0.00	$4.30	—	—	—	—
Call · $98 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.263 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $98 Daily-bar session Unknown Quote as of 2026-09-04 19:55:03.837 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$0.00	$4.40	—	—	—	—
Call · $99 In the money Daily-bar session Unknown Quote as of 2026-09-04 16:30:01.320 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $99 Daily-bar session Unknown Quote as of 2026-09-04 16:43:00.590 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
Underlying $99.19
—	—	—	—	$0.00	$0.10	—		$1.90	$0.80	$2.80	-0.568	19.1%	6	—
Call · $100 Daily-bar session Unknown Quote as of 2026-09-04 16:30:01.322 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $100 In the money Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:55:02.790 UTC Last $1.90 Breakeven $98.10 Implied vol 19.1% Delta -0.568 ≈57% ITM Gamma 0.11 Theta -0.048 Vega 0.074 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.30	—		$1.80	$1.80	$4.80	-0.6	31.4%	6	1
Call · $101 Daily-bar session Unknown Quote as of 2026-09-04 19:55:03.668 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $101 In the money Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:55:03.699 UTC Last $1.80 Breakeven $99.20 Implied vol 31.4% Delta -0.6 ≈60% ITM Gamma 0.066 Theta -0.081 Vega 0.072 Open interest 1 OI effective date Sep 3, 2026 Model this put
—	—	—	—	$0.00	$4.30	—		$2.80	$2.80	$5.40	-0.651	33.6%	5	2
Call · $102 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.382 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $102 In the money Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:55:04.783 UTC Last $2.80 Breakeven $99.20 Implied vol 33.6% Delta -0.651 ≈65% ITM Gamma 0.059 Theta -0.083 Vega 0.069 Open interest 2 OI effective date Sep 3, 2026 Model this put
—	—	—	—	$0.00	$4.30	—		—	$0.40	$8.50	-0.747	27.9%	—	—
Call · $103 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.612 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $103 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.488 UTC Last — Breakeven — Implied vol 27.9% Delta -0.747 ≈75% ITM Gamma 0.061 Theta -0.057 Vega 0.06 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.30	—		—	$0.90	$9.50	-0.808	27.2%	—	—
Call · $104 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.895 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $104 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.538 UTC Last — Breakeven — Implied vol 27.2% Delta -0.808 ≈81% ITM Gamma 0.054 Theta -0.045 Vega 0.051 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.30	—		—	$1.40	$10.50	-0.877	24.9%	—	—
Call · $105 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.635 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $105 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.292 UTC Last — Breakeven — Implied vol 24.9% Delta -0.877 ≈88% ITM Gamma 0.044 Theta -0.027 Vega 0.038 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.30	—		—	$2.15	$11.50	-0.923	23.9%	—	—
Call · $106 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.108 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $106 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.700 UTC Last — Breakeven — Implied vol 23.9% Delta -0.923 ≈92% ITM Gamma 0.032 Theta -0.015 Vega 0.027 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.30	—		—	$3.10	$12.50	-0.937	25.5%	—	—
Call · $107 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.711 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $107 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:09.022 UTC Last — Breakeven — Implied vol 25.5% Delta -0.937 ≈94% ITM Gamma 0.026 Theta -0.013 Vega 0.023 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.30	—		—	$4.10	$13.50	-0.941	28%	—	—
Call · $108 Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.221 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 19:55:09.498 UTC Last — Breakeven — Implied vol 28% Delta -0.941 ≈94% ITM Gamma 0.023 Theta -0.014 Vega 0.022 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 · Sep 4, 2026; 35 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.