Columbia Banking System, Inc. (COLB) Gamma Exposure (GEX) & Greeks
Gamma exposure (GEX) analysis shows how options positioning creates dealer hedging pressure across strikes. Includes delta, vanna, charm, vomma, and vega exposure by strike price.
Columbia Banking System, Inc. (COLB) operates in the Financial Services sector, specifically the Banks - Regional industry, with a market capitalization near $6.83B, listed on NASDAQ, employing roughly 4,721 people, carrying a beta of 0.68 to the broader market. Columbia Banking System, Inc. Led by Clinton E. Stein, public since 1992-06-16.
Snapshot as of May 15, 2026.
- Spot Price
- $28.84
- Net Gamma
- $41.2K
- Net Delta
- -$9.0M
- Net Vega
- -$13.0K
- Gamma Concentration
- 0.36
As of May 15, 2026, Columbia Banking System, Inc. (COLB) has positive net gamma exposure of $41.2K under the standard dealer-hedging convention. Net delta exposure is -$9.0M. Positive GEX means dealers are net long gamma: they buy into dips and sell into rallies, damping realized volatility and often causing price to pin near heavy open-interest strikes.
COLB Strategy Sizing in the Current GEX Regime
Columbia Banking System, Inc. is in a positive dealer-gamma regime ($41.2K). Net dealer delta of -$9.0M sets the size of the directional hedging flow that fires as spot moves. In this regime, mean-reverting strategies fit the regime: credit spreads, iron condors, covered calls near established ranges. Realized volatility tends to undershoot implied during positive-gamma stretches, supporting the short-vol structures. The gamma-flip level - the spot price at which net dealer gamma changes sign - is the most actionable anchor for sizing: through-flip moves trigger qualitatively different hedging behavior than within-regime moves, so risk-defined structures sized to the current spot may not stay sized correctly if a flip is near.
Learn how gamma exposure is reported and how to read the data →
Frequently asked COLB gamma exposure (gex) & greeks questions
- What is the current COLB gamma exposure (GEX)?
- As of May 15, 2026, Columbia Banking System, Inc. (COLB) net gamma exposure is positive at $41.2K under the standard dealer-hedging convention. Net dealer delta exposure is -$9.0M. GEX aggregates the gamma sitting on dealer books across all listed strikes and expirations.
- Is COLB in positive or negative dealer gamma right now?
- COLB is currently in positive dealer gamma. Dealers net long gamma buy underlying weakness and sell into rallies to maintain delta-neutrality, which dampens realized volatility and tends to pin price near heavy open-interest strikes.
- What does COLB GEX tell options traders?
- GEX is a regime indicator: positive-gamma regimes favor mean-reverting strategies (premium-selling near established ranges); negative-gamma regimes favor momentum and breakout strategies. The same options-strategy structure can be appropriate or inappropriate depending on the dealer-gamma regime, so reading the sign and magnitude of net GEX before sizing positions is standard practice.