A gas storage swap is a financial derivative that allows market participants to trade the value of natural gas storage capacity and seasonal price spreads without owning physical storage facilities. These swaps typically exchange fixed payments for floating payments based on storage injection and withdrawal spreads, providing exposure to seasonal natural gas price volatility.

Gas storage swaps enable utilities, producers, and traders to monetize or hedge the value of seasonal price differences that make storage operations profitable. The instruments help manage risks associated with natural gas storage operations while providing investment opportunities for those seeking exposure to seasonal energy price patterns without physical infrastructure requirements.

Real-world example: A financial firm enters a gas storage swap paying $2.50 per MMBtu fixed rate while receiving winter-summer price spreads, profiting when seasonal spreads exceed $2.50 due to strong winter demand and tight storage inventories.