FireSide 
Market Watch

Sold as a commodity on the New York Mercantile Exchange (NYMEX), natural gas is known to be one of the most volatile commodities currently on the market. The price of natural gas is set by market forces; the buying and selling by market players based on supply and demand, determines the average price of natural gas. The markets for natural gas can be broken into two distinct categories, spot pricing and the futures market. Spot pricing is the daily market cost for gas to be bought and sold right now, whereas future contracts allow for pricing to be locked in up to 36 months in advance.