Columbia Banking System (COLB) Options Chain

NASDAQ: COLBFinanceMajor BanksUSD

28.37-0.16 (-0.56%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $28.37
Put/call ratio (OI): 0.13
Put/call ratio (volume): 0.18
ATM implied volatility: 35.9%
Expected move: ±$3.37
Open interest (C / P): 3.11K / 419

COLB options summary

The COLB options chain for the November 20, 2026 expiration lists 6 call and 6 put contracts, with 40 days until expiration. Open interest stands at 3,110 calls and 419 puts, a put/call ratio of 0.13, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $30.00 strike is 35.9%, which implies the market expects a move of about ±$3.37 (11.9%) in Columbia Banking System stock by expiration.

The most open interest sits at the $35.00 call (1.66K contracts) and the $25.00 put (283 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

COLB options chain · November 20, 2026

COLB calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
1	1	152.9%	14.20	12.20	15.60	15.00	—	—	—	—	—	—
—	—	—	—	—	—	17.50	0.00	1.75	0.40	143.8%	3	34
12	1	163.6%	10.01	8.60	12.20	20.00	0.00	1.70	0.35	112.6%	1	6
—	—	—	—	—	—	22.50	0.00	1.70	0.40	85.5%	10	7
82	17	55.5%	3.40	3.40	4.10	25.00	0.00	0.35	0.09	40.8%	1	283
COLB $28.37
573	19	30.6%	0.30	0.10	0.55	30.00	1.30	2.55	2.04	41.2%	1	89
1,662	44	39.5%	0.10	0.05	0.10	35.00	0.00	0.00	4.53	—	5	0
780	34	70.0%	0.05	0.00	0.50	40.00	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the COLB put/call ratio?

For the November 20, 2026 expiration, the COLB put/call ratio based on open interest is 0.13 (419 puts vs 3,110 calls), and 0.18 based on today's volume. A ratio above 1 means more puts than calls.

What is COLB's implied volatility?

At-the-money implied volatility for COLB options expiring November 20, 2026 is about 35.9%, an annualized estimate of how much the market expects Columbia Banking System stock to move.

How many COLB option expiration dates are there?

COLB has 4 listed expiration dates, from Oct 16, 2026 to May 21, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.