BY · Byline Bancorp, Inc.

Track BY — free Ask ALVIS about BY

$38.46 -0.14 (-0.35%)

Market Cap

$1.75B

45.41M

Options Chain

15-min delayed Underlying $38.46 · today Options Calculator

Positioning

Aug 21, 2026 · 25 days to expiry · 10 contracts

Put / call OI

0.17

Call-heavy positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$35.00

$3.46 below spot

ATM implied vol

66.9%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 25d Sep 18 53d Dec 18 144d Mar 19 235d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	96.1%	0.967	—		—	—	—	—	0
Call · $25 In the money Last — Breakeven — Implied vol 96.1% Delta 0.967 ≈97% ITM Gamma 0.007 Theta -0.015 Vega 0.008 Open interest 0 Model this call Put · $25 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	1	68.3%	0.931	$7.24		$0.07	—	—	1	1
Call · $30 In the money Last $7.24 Breakeven $37.24 Implied vol 68.3% Delta 0.931 ≈93% ITM Gamma 0.019 Theta -0.019 Vega 0.016 Open interest 0 Model this call Put · $30 Last $0.07 Breakeven $29.93 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
5	2	59.7%	0.755	$5.50		—	—	—	—	0
Call · $35 In the money Last $5.50 Breakeven $40.50 Implied vol 59.7% Delta 0.755 ≈75% ITM Gamma 0.052 Theta -0.039 Vega 0.033 Open interest 5 Model this call Put · $35 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
Underlying $38.46
1	1	75.9%	0.466	$0.65		—	-0.567	57.9%	—	0
Call · $40 Last $0.65 Breakeven $40.65 Implied vol 75.9% Delta 0.466 ≈47% ITM Gamma 0.052 Theta -0.062 Vega 0.041 Open interest 1 Model this call Put · $40 In the money Last — Breakeven — Implied vol 57.9% Delta -0.567 ≈57% ITM Gamma 0.068 Theta -0.045 Vega 0.041 Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $45 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $45 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. 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. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1702750 CUSIP 124411109 13F (30d) 25 filings 25 filers Visit website Investor relations