Natural-gas prices posted their biggest gains in nearly three months on Tuesday as technical traders pushed the rally into a second day. Natural gas for October delivery briefly topped $4 a million British thermal units before ending the day up 10.8 cents, or 2.8%, at $3.984/mmBtu on the New York Mercantile Exchange. It was the largest one-day rise since June 12. Prices have gained 5% in two days, surprising many analysts and traders who struggled to pinpoint the spark for so much buying at a time when production is overwhelming demand. “I didn’t really see a whole lot of reason for it to go up this much,” said Kyle Cooper, managing director of research for gas firm Cypress Energy in Houston. “The market really seems comfortable in the $3.80 to $4 range. And the market really seems to want to test each […]