OSBC · Old Second Bancorp Inc

Track OSBC — free

$25.91 +0.10 (+0.39%) At close · Aug 14

Market Cap

$1.32B

50.88M

Options Chain

Underlying $25.91 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 14 contracts · mixed snapshot sessions · Jul 24, 2026–Aug 11, 2026; 9 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 5d Sep 18 33d Dec 18 124d Mar 19 215d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
1	1	—	—	$12.90		—	—	—	—	0
Call · $12.5 In the money Snapshot session Jul 30, 2026 Last $12.90 Breakeven $25.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $12.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	2	339.4%	0.939	$10.44		—	—	—	—	0
Call · $15 In the money Snapshot session Jul 29, 2026 Last $10.44 Breakeven $25.44 Implied vol 339.4% Delta 0.939 ≈94% ITM Gamma 0.011 Theta -0.122 Vega 0.004 Open interest 1 Model this call Put · $15 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $17.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $17.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	-0.119	205.9%	—	0
Call · $20 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $20 Snapshot session Unknown Last — Breakeven — Implied vol 205.9% Delta -0.119 ≈12% ITM Gamma 0.031 Theta -0.122 Vega 0.007 Open interest 0 Model this put
40	1	—	—	$2.81		$0.55	-0.195	155.2%	1	48
Call · $22.5 In the money Snapshot session Aug 11, 2026 Last $2.81 Breakeven $25.31 Implied vol — Delta — Gamma — Theta — Vega — Open interest 40 Model this call Put · $22.5 Snapshot session Aug 7, 2026 Last $0.55 Breakeven $21.95 Implied vol 155.2% Delta -0.195 ≈20% ITM Gamma 0.058 Theta -0.129 Vega 0.008 Open interest 48 Model this put
4	6	136.2%	0.619	$0.30		—	-0.309	65.4%	—	0
Call · $25 In the money Snapshot session Jul 24, 2026 Last $0.30 Breakeven $25.30 Implied vol 136.2% Delta 0.619 ≈62% ITM Gamma 0.09 Theta -0.155 Vega 0.012 Open interest 4 Model this call Put · $25 Snapshot session Unknown Last — Breakeven — Implied vol 65.4% Delta -0.309 ≈31% ITM Gamma 0.175 Theta -0.068 Vega 0.011 Open interest 0 Model this put
Underlying $25.91
0	—	130.8%	0.198	—		—	—	—	—	0
Call · $30 Snapshot session Unknown Last — Breakeven — Implied vol 130.8% Delta 0.198 ≈20% ITM Gamma 0.069 Theta -0.108 Vega 0.009 Open interest 0 Model this call Put · $30 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — 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 · Jul 24, 2026–Aug 11, 2026; 9 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 357173 CUSIP 680277100 13F (30d) 173 filings 172 filers Visit website Investor relations