Finally, the most compelling part about APA is its strong cash flow generation which is likely to be prioritized in an inflationary environment with rising rates. Therefore, investors should consider buying these undervalued energy stocks: TransGlobe Energy (NASDAQ:TGA) Apache (NASDAQ:APA) Ovintiv (NYSE:OVV) Undervalued Energy Stocks: TransGlobe Energy (TGA) Source: Shutterstock TGA and its subsidiaries acquire, explore, produce, and develop crude oil and natural gas in Egypt and Canada. Apache (APA) Source: JHVEPhoto / Shutterstock.com APA through its subsidiaries explores for and produces oil and gas properties.