SIZE · iShares MSCI USA Size Factor ETF ETF

Alerts for SIZE

$182.84 -0.60 (-0.33%) At close · Sep 4

Options Chain

Underlying $182.84 · at close Sep 4, 2026 Options Calculator

Positioning

Sep 18, 2026 · 12 days to expiry · 72 contracts · mixed daily-bar sessions · Mar 11, 2026; 70 unknown

Put / call OI

0.00

Call-heavy positioning

Open interest

as of Sep 3, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$159.00

$23.84 below spot

ATM implied vol

19.6%

market's expected move

Open interest by strike · near the money

Calls Puts

105

110

115

120

125

130

135

140

145

150

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

180

185

190

195

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 12d Oct 16 40d Dec 18 103d Mar 19 194d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$76.00	$80.80	—		—	$0.00	$0.75	—	—	—	—
Call · $105 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:22.353 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $105 Daily-bar session Unknown Quote as of 2026-09-04 16:38:26.513 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$71.10	$75.90	—		—	$0.00	$0.75	—	—	—	—
Call · $110 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:22.254 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $110 Daily-bar session Unknown Quote as of 2026-09-04 16:53:16.293 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$66.10	$70.90	—		—	$0.00	$0.75	—	—	—	—
Call · $115 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:22.155 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $115 Daily-bar session Unknown Quote as of 2026-09-04 16:43:19.843 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$61.10	$65.90	—		—	$0.00	$0.75	—	—	—	—
Call · $120 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:22.053 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $120 Daily-bar session Unknown Quote as of 2026-09-04 16:33:49.069 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$56.10	$60.90	—		—	$0.00	$0.75	—	—	—	—
Call · $125 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:21.955 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $125 Daily-bar session Unknown Quote as of 2026-09-04 16:33:49.069 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$51.10	$55.90	—		—	$0.00	$0.75	—	—	—	—
Call · $130 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:21.852 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $130 Daily-bar session Unknown Quote as of 2026-09-04 19:58:06.291 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$46.10	$51.00	—		—	$0.00	$0.75	—	—	—	—
Call · $135 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:21.718 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $135 Daily-bar session Unknown Quote as of 2026-09-04 19:57:47.077 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	84.2%	0.961	$41.10	$45.90	—		—	$0.00	$0.75	—	—	—	—
Call · $140 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:21.501 UTC Last — Breakeven — Implied vol 84.2% Delta 0.961 ≈96% ITM Gamma 0.003 Theta -0.107 Vega 0.029 Open interest — OI effective date — Model this call Put · $140 Daily-bar session Unknown Quote as of 2026-09-04 19:55:16.661 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	74.8%	0.958	$36.10	$40.90	—		—	$0.00	$0.75	—	—	—	—
Call · $145 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:21.195 UTC Last — Breakeven — Implied vol 74.8% Delta 0.958 ≈96% ITM Gamma 0.004 Theta -0.104 Vega 0.031 Open interest — OI effective date — Model this call Put · $145 Daily-bar session Unknown Quote as of 2026-09-04 19:57:23.408 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	65.6%	0.953	$31.10	$35.90	—		—	$0.00	$0.75	—	—	—	—
Call · $150 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:20.482 UTC Last — Breakeven — Implied vol 65.6% Delta 0.953 ≈95% ITM Gamma 0.004 Theta -0.1 Vega 0.034 Open interest — OI effective date — Model this call Put · $150 Daily-bar session Unknown Quote as of 2026-09-04 19:59:32.943 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	56.6%	0.947	$26.10	$30.90	—		—	$0.00	$0.75	—	—	—	—
Call · $155 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:19.714 UTC Last — Breakeven — Implied vol 56.6% Delta 0.947 ≈95% ITM Gamma 0.006 Theta -0.096 Vega 0.038 Open interest — OI effective date — Model this call Put · $155 Daily-bar session Unknown Quote as of 2026-09-04 19:55:13.722 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	54.8%	0.945	$25.10	$29.90	—		—	$0.00	$0.75	—	—	—	—
Call · $156 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:19.541 UTC Last — Breakeven — Implied vol 54.8% Delta 0.945 ≈95% ITM Gamma 0.006 Theta -0.095 Vega 0.038 Open interest — OI effective date — Model this call Put · $156 Daily-bar session Unknown Quote as of 2026-09-04 19:55:49.088 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	53%	0.944	$24.10	$28.90	—		—	$0.00	$0.75	—	—	—	—
Call · $157 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:19.185 UTC Last — Breakeven — Implied vol 53% Delta 0.944 ≈94% ITM Gamma 0.006 Theta -0.094 Vega 0.039 Open interest — OI effective date — Model this call Put · $157 Daily-bar session Unknown Quote as of 2026-09-04 19:55:13.209 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	52.4%	0.938	$23.10	$28.00	—		—	$0.00	$0.75	—	—	—	—
Call · $158 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:18.842 UTC Last — Breakeven — Implied vol 52.4% Delta 0.938 ≈94% ITM Gamma 0.007 Theta -0.1 Vega 0.042 Open interest — OI effective date — Model this call Put · $158 Daily-bar session Unknown Quote as of 2026-09-04 19:55:32.383 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	2	49.4%	0.94	$22.10	$26.90	$11.50		—	$0.00	$0.75	—	—	—	—
Call · $159 In the money Daily-bar session Mar 11, 2026 Quote as of 2026-09-04 19:55:18.439 UTC Last $11.50 Breakeven $170.50 Implied vol 49.4% Delta 0.94 ≈94% ITM Gamma 0.007 Theta -0.093 Vega 0.041 Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $159 Daily-bar session Unknown Quote as of 2026-09-04 19:55:12.809 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	47.7%	0.939	$21.10	$25.90	—		—	$0.00	$0.75	—	—	—	—
Call · $160 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:17.947 UTC Last — Breakeven — Implied vol 47.7% Delta 0.939 ≈94% ITM Gamma 0.007 Theta -0.092 Vega 0.042 Open interest — OI effective date — Model this call Put · $160 Daily-bar session Unknown Quote as of 2026-09-04 19:59:52.458 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	45.9%	0.937	$20.10	$24.90	—		—	$0.00	$0.75	—	—	—	—
Call · $161 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:17.675 UTC Last — Breakeven — Implied vol 45.9% Delta 0.937 ≈94% ITM Gamma 0.008 Theta -0.091 Vega 0.043 Open interest — OI effective date — Model this call Put · $161 Daily-bar session Unknown Quote as of 2026-09-04 19:59:56.583 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	51%	0.907	$19.40	$24.30	—		—	$0.00	$0.75	—	—	—	—
Call · $162 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:17.444 UTC Last — Breakeven — Implied vol 51% Delta 0.907 ≈91% ITM Gamma 0.01 Theta -0.127 Vega 0.058 Open interest — OI effective date — Model this call Put · $162 Daily-bar session Unknown Quote as of 2026-09-04 19:55:11.923 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	49%	0.904	$18.40	$23.30	—		—	$0.00	$0.75	—	—	—	—
Call · $163 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:17.161 UTC Last — Breakeven — Implied vol 49% Delta 0.904 ≈90% ITM Gamma 0.01 Theta -0.126 Vega 0.059 Open interest — OI effective date — Model this call Put · $163 Daily-bar session Unknown Quote as of 2026-09-04 19:55:11.439 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	47.1%	0.9	$17.40	$22.30	—		—	$0.00	$0.75	—	—	—	—
Call · $164 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:16.814 UTC Last — Breakeven — Implied vol 47.1% Delta 0.9 ≈90% ITM Gamma 0.011 Theta -0.124 Vega 0.061 Open interest — OI effective date — Model this call Put · $164 Daily-bar session Unknown Quote as of 2026-09-04 19:55:44.168 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	2	45.2%	0.897	$16.40	$21.30	$7.96		—	$0.00	$0.75	—	—	—	—
Call · $165 In the money Daily-bar session Mar 11, 2026 Quote as of 2026-09-04 19:55:16.313 UTC Last $7.96 Breakeven $172.96 Implied vol 45.2% Delta 0.897 ≈90% ITM Gamma 0.012 Theta -0.122 Vega 0.062 Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $165 Daily-bar session Unknown Quote as of 2026-09-04 19:55:50.918 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	43.2%	0.893	$15.40	$20.30	—		—	$0.00	$0.75	—	—	—	—
Call · $166 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:15.826 UTC Last — Breakeven — Implied vol 43.2% Delta 0.893 ≈89% ITM Gamma 0.012 Theta -0.12 Vega 0.064 Open interest — OI effective date — Model this call Put · $166 Daily-bar session Unknown Quote as of 2026-09-04 19:55:10.366 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	41.3%	0.889	$14.40	$19.30	—		—	$0.00	$0.75	—	—	—	—
Call · $167 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:15.419 UTC Last — Breakeven — Implied vol 41.3% Delta 0.889 ≈89% ITM Gamma 0.013 Theta -0.118 Vega 0.065 Open interest — OI effective date — Model this call Put · $167 Daily-bar session Unknown Quote as of 2026-09-04 19:55:55.193 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	39.3%	0.884	$13.40	$18.30	—		—	$0.00	$0.75	—	—	—	—
Call · $168 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:15.106 UTC Last — Breakeven — Implied vol 39.3% Delta 0.884 ≈88% ITM Gamma 0.014 Theta -0.116 Vega 0.067 Open interest — OI effective date — Model this call Put · $168 Daily-bar session Unknown Quote as of 2026-09-04 19:55:09.210 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	37.3%	0.879	$12.40	$17.30	—		—	$0.00	$0.75	—	—	—	—
Call · $169 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:14.476 UTC Last — Breakeven — Implied vol 37.3% Delta 0.879 ≈88% ITM Gamma 0.016 Theta -0.114 Vega 0.069 Open interest — OI effective date — Model this call Put · $169 Daily-bar session Unknown Quote as of 2026-09-04 19:55:08.696 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	34.6%	0.878	$11.40	$16.20	—		—	$0.00	$0.75	—	—	—	—
Call · $170 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:14.233 UTC Last — Breakeven — Implied vol 34.6% Delta 0.878 ≈88% ITM Gamma 0.017 Theta -0.108 Vega 0.07 Open interest — OI effective date — Model this call Put · $170 Daily-bar session Unknown Quote as of 2026-09-04 19:59:22.638 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	32.7%	0.872	$10.40	$15.20	—		—	$0.00	$0.75	—	—	—	—
Call · $171 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:13.534 UTC Last — Breakeven — Implied vol 32.7% Delta 0.872 ≈87% ITM Gamma 0.019 Theta -0.105 Vega 0.072 Open interest — OI effective date — Model this call Put · $171 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.364 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$8.50	$13.30	—		—	$0.00	$0.75	—	—	—	—
Call · $172 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:12.945 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $172 Daily-bar session Unknown Quote as of 2026-09-04 19:57:00.698 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$7.50	$11.40	—		—	$0.00	$0.75	—	—	—	—
Call · $173 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:12.390 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $173 Daily-bar session Unknown Quote as of 2026-09-04 19:58:57.493 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$6.50	$10.40	—		—	$0.00	$0.75	—	—	—	—
Call · $174 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:01.184 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $174 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.721 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$5.60	$10.30	—		—	$0.00	$0.75	—	—	—	—
Call · $175 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:10.602 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $175 Daily-bar session Unknown Quote as of 2026-09-04 19:55:01.343 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$4.50	$9.30	—		—	$0.00	$0.75	—	—	—	—
Call · $176 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:09.542 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $176 Daily-bar session Unknown Quote as of 2026-09-04 19:59:41.200 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	13.7%	0.748	$2.20	$5.40	—		—	$0.15	$2.20	-0.299	17.6%	—	—
Call · $180 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:03.880 UTC Last — Breakeven — Implied vol 13.7% Delta 0.748 ≈75% ITM Gamma 0.067 Theta -0.072 Vega 0.11 Open interest — OI effective date — Model this call Put · $180 Daily-bar session Unknown Quote as of 2026-09-04 19:59:02.666 UTC Last — Breakeven — Implied vol 17.6% Delta -0.299 ≈30% ITM Gamma 0.057 Theta -0.076 Vega 0.12 Open interest — OI effective date — Model this put
Underlying $182.84
—	—	—	—	$0.00	$1.95	—		—	$1.65	$5.90	-0.604	19.6%	—	—
Call · $185 Daily-bar session Unknown Quote as of 2026-09-04 19:58:18.108 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $185 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:49:58.287 UTC Last — Breakeven — Implied vol 19.6% Delta -0.604 ≈60% ITM Gamma 0.057 Theta -0.089 Vega 0.133 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.75	—		—	$6.30	$9.70	-0.777	25.1%	—	—
Call · $190 Daily-bar session Unknown Quote as of 2026-09-04 19:55:38.963 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $190 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:50:00.633 UTC Last — Breakeven — Implied vol 25.1% Delta -0.777 ≈78% ITM Gamma 0.035 Theta -0.084 Vega 0.103 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.75	—		—	$11.40	$14.20	-0.843	32.3%	—	—
Call · $195 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.828 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $195 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:49:58.591 UTC Last — Breakeven — Implied vol 32.3% Delta -0.843 ≈84% ITM Gamma 0.022 Theta -0.086 Vega 0.083 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 · Mar 11, 2026; 70 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 15 strikes around the money are shown by default — switch to "All 36" for the wings. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.