Key Takeaways EPD says fee-based earnings remained its largest gross operating margin contributor in recent years.Midstream assets booked long-term help Enterprise Products maintain predictable cash flows.EPD units gained 4.7% over the past year while trading slightly below the industry's EV/EBITDA average.With West Texas Intermediate (WTI) oil prices currently trading below $60 per barrel, according to data from Oilprice.com, which is significantly lower than a year ago, the overall energy business is now ...