The Zacks Analyst Blog Highlights: ConocoPhillips, HollyFrontier, Occidental Petroleum and PDC Energy Posted byZacks Equity Research December 10, 2021 Leave a comment on The Zacks Analyst Blog Highlights: ConocoPhillips, HollyFrontier, Occidental Petroleum and PDC Energy The Zacks Analyst Blog Highlights: ConocoPhillips, HollyFrontier, Occidental Petroleum and PDC Energy