The 'Change in Natural Gas Inventories' measures the weekly variation in stored natural gas volumes in the U.S., reported by the Energy Information Administration (EIA). It reflects supply-demand balance and storage levels. Traders watch it closely as higher inventories can signal lower prices, while draws may indicate rising demand or supply constraints, impacting USD and energy markets. Market reactions often include volatility in natural gas prices and related currencies. Historically, unexpected inventory changes have triggered sharp market moves.