As average prices of U.S. natural gas fell in 2023, natural gas prices also became less volatile compared with 2022. Historical volatility, a measure of daily price changes relative to average prices, eased from the recent highs reached in 2022. The measure of historical volatility we use here, which relates short-term price movements to average prices over a defined period, reached 171% for U.S. wholesale natural gas in February 2022, the most volatile since at least 1994. This 30-day historical volatility of U.S. natural gas prices is based on the U.S. benchmark Henry Hub front-month futures price. It averaged 69% in 2023 compared with 91% across all of 2022.