Though natural gas prices seem to have been in a slump during the past year they could rebound as early as winter, according to equity research firm C.K. Cooper & Co. The firm originally estimated that natural gas in storage would reach its full capacity by winter, which would send prices plummeting. However, the firm recently changed its bearish tune in a new report, saying, “It has become evident that gas injections are much less than the historical trend would predict.”