Image Source: Zacks Investment Research Zacks Recommendation Upgrade Drive Aemetis, ProFrac Higher Shares of Aemetis, Inc. AMTX and ProFrac Holding Corp. PFHC gained 32.97% and 18.3%, respectively, since their Zacks Recommendation was upgraded to Outperform on August 8. Aemetis, Inc (AMTX): Free Stock Analysis Report Most importantly, signs of easing inflation now could compel the Federal Reserve to curtail the pace of its monetary tightening measures that resulted in a lot of volatility in the stock market throughout this year.