WSBF · Waterstone Financial, Inc.

Track WSBF — free

$21.01 -0.03 (-0.14%)

Market Cap

$378.24M

17.98M

Options Chain

Underlying $21.01 · today Options Calculator

Positioning

Aug 21, 2026 · expires today · 22 contracts · mixed snapshot sessions · Mar 3, 2026–Aug 19, 2026; 16 unknown

Put / call OI

—

dated and unknown snapshot sessions

Open interest

—

dated and unknown snapshot sessions

Volume

—

dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 0d Sep 18 28d Oct 16 56d Nov 20 91d Feb 19 182d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
2	2	0%	1	$18.78		—	—	—	—	0
Call · $2.5 In the money Snapshot session Aug 19, 2026 Last $18.78 Breakeven $21.28 Implied vol 0% Delta 1 ≈100% ITM Gamma 0 Theta 0 Vega 0 Open interest 2 Model this call Put · $2.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	17	0%	1	$15.07		$0.18	—	—	1	1
Call · $5 In the money Snapshot session Jul 7, 2026 Last $15.07 Breakeven $20.07 Implied vol 0% Delta 1 ≈100% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this call Put · $5 Snapshot session Jul 24, 2026 Last $0.18 Breakeven $4.82 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
0	—	0%	1	—		—	—	—	—	0
Call · $7.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 0% Delta 1 ≈100% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this call Put · $7.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	1263.4%	0.976	—		—	—	—	—	0
Call · $10 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1263.4% Delta 0.976 ≈98% ITM Gamma 0.006 Theta -0.618 Vega 0 Open interest 0 Model this call Put · $10 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	823.8%	0.979	—		—	—	—	—	0
Call · $12.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 823.8% Delta 0.979 ≈98% ITM Gamma 0.008 Theta -0.351 Vega 0 Open interest 0 Model this call Put · $12.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
6	5	566.3%	0.971	$5.60		—	—	—	—	0
Call · $15 In the money Snapshot session Jul 29, 2026 Last $5.60 Breakeven $20.60 Implied vol 566.3% Delta 0.971 ≈97% ITM Gamma 0.016 Theta -0.322 Vega 0.001 Open interest 6 Model this call Put · $15 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	399.4%	0.927	—		—	-0.161	622.5%	—	0
Call · $17.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 399.4% Delta 0.927 ≈93% ITM Gamma 0.049 Theta -0.473 Vega 0.001 Open interest 0 Model this call Put · $17.5 Snapshot session Unknown Last — Breakeven — Implied vol 622.5% Delta -0.161 ≈16% ITM Gamma 0.055 Theta -1.303 Vega 0.002 Open interest 0 Model this put
6	4	148.1%	0.865	$0.50		$1.01	-0.27	277.9%	10	10
Call · $20 In the money Snapshot session Mar 3, 2026 Last $0.50 Breakeven $20.50 Implied vol 148.1% Delta 0.865 ≈86% ITM Gamma 0.208 Theta -0.278 Vega 0.002 Open interest 6 Model this call Put · $20 Snapshot session Jul 31, 2026 Last $1.01 Breakeven $18.99 Implied vol 277.9% Delta -0.27 ≈27% ITM Gamma 0.167 Theta -0.787 Vega 0.002 Open interest 10 Model this put
Underlying $21.01
0	—	—	—	—		—	-0.675	364.6%	—	0
Call · $22.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $22.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 364.6% Delta -0.675 ≈68% ITM Gamma 0.139 Theta -1.124 Vega 0.003 Open interest 0 Model this put
0	—	—	—	—		—	-1	143.2%	—	0
Call · $25 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $25 In the money Snapshot session Unknown Last — Breakeven — Implied vol 143.2% Delta -1 ≈100% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this put
0	—	—	—	—		—	-0.966	548.9%	—	0
Call · $30 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $30 In the money Snapshot session Unknown Last — Breakeven — Implied vol 548.9% Delta -0.966 ≈97% ITM Gamma 0.019 Theta -0.354 Vega 0 Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Mar 3, 2026–Aug 19, 2026; 16 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown.

Key facts CIK 1569994 CUSIP 94188P101 13F (30d) 111 filings 111 filers Visit website