Aemetis initiated with a Buy at Stifel 16:13 AMTX, DVN Stifel analyst Derrick Whitfield initiated coverage of Aemetis (AMTX) with a Buy rating and $25 price target. He also added the stock to the firm's Select List and removed Devon Energy (DVN). He is constructive on the fundamentals of renewable natural gas, or RNG, and views Aemetis as "the best vehicle to express a bullish view on low carbon intensity RNG," Whitfield tells investors. He argues that the premium for RNG projects with negative carbon intensity profiles, such as those at Aemetis, "will only increase over time," the analyst added.